diff --git a/CHANGELOG.md b/CHANGELOG.md
index b9e6b4c5..45f8b27c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,16 @@
 # offline-editor-js - Changelog
 
+## Version 3.4.0 - September 13, 2016
+
+Possible breaking changes.
+
+**Enhancements**
+* Added base64 re-encoding to the tile database that results in a 2.7x (16/6) reduction in storage size.
+
+**Known Issues**
+* Firefox v48.x is showing tiles as hidden when they should be visible. This issue existed at v3.3.2.
+
+
 ## Version 3.3.2 - August 24, 2016
 
 No breaking changes. 
diff --git a/Gruntfile.js b/Gruntfile.js
index 505a392e..72e505ee 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -33,6 +33,7 @@ module.exports = function(grunt) {
                     'lib/tiles/OfflineTilesNS.js',
                     'lib/tiles/TilesCore.js',
                     'lib/tiles/TilesStore.js',
+                    'lib/tiles/base64string.js',
                     'lib/tiles/tilingScheme.js',
                     'lib/tpk/autoCenterMap.js',
                     'lib/tpk/OfflineTpkNS.js',
@@ -74,6 +75,7 @@ module.exports = function(grunt) {
                     'lib/tiles/OfflineTilesBasic.js',
                     'lib/tiles/OfflineTilesNS.js',
                     'lib/tiles/base64utils.js',
+                    'lib/tiles/base64string.js',
                     'lib/tiles/FileSaver.js',
                     'lib/tiles/TilesCore.js',
                     'lib/tiles/TilesStore.js',
@@ -87,6 +89,7 @@ module.exports = function(grunt) {
                     'lib/tiles/OfflineTilesAdvanced.js',
                     'lib/tiles/OfflineTilesNS.js',
                     'lib/tiles/base64utils.js',
+                    'lib/tiles/base64string.js',
                     'lib/tiles/FileSaver.js',
                     'lib/tiles/TilesCore.js',
                     'lib/tiles/TilesStore.js',
diff --git a/dist/offline-edit-advanced-src.js b/dist/offline-edit-advanced-src.js
index eb953c22..cc5dd9e0 100644
--- a/dist/offline-edit-advanced-src.js
+++ b/dist/offline-edit-advanced-src.js
@@ -1,4 +1,4 @@
-/*! esri-offline-maps - v3.3.0 - 2016-07-12
+/*! esri-offline-maps - v3.4.0 - 2016-09-13
 *   Copyright (c) 2016 Environmental Systems Research Institute, Inc.
 *   Apache License*/
 // Configure offline/online detection
diff --git a/dist/offline-edit-basic-src.js b/dist/offline-edit-basic-src.js
index 3205403e..c38cd2c6 100644
--- a/dist/offline-edit-basic-src.js
+++ b/dist/offline-edit-basic-src.js
@@ -1,4 +1,4 @@
-/*! esri-offline-maps - v3.3.0 - 2016-07-12
+/*! esri-offline-maps - v3.4.0 - 2016-09-13
 *   Copyright (c) 2016 Environmental Systems Research Institute, Inc.
 *   Apache License*/
 // Configure offline/online detection
diff --git a/dist/offline-tiles-advanced-min.js b/dist/offline-tiles-advanced-min.js
index a94b1e23..dee7390c 100644
--- a/dist/offline-tiles-advanced-min.js
+++ b/dist/offline-tiles-advanced-min.js
@@ -30,7 +30,69 @@ return d<<16|65535&c},O.esri.Tiles.Base64Utils.stringToWord=function(a){for(var
 return d},O.esri.Tiles.Base64Utils.wordToString=function(a){for(var b=8,c=(1<<b)-1,d=[],e=0,f=32*a.length;f>e;e+=b)d.push(String.fromCharCode(a[e>>5]>>>e%32&c))
 return d.join("")},O.esri.Tiles.Base64Utils.wordToHex=function(a){for(var b="0123456789abcdef",c=[],d=0,e=4*a.length;e>d;d++)c.push(b.charAt(a[d>>2]>>d%4*8+4&15)+b.charAt(a[d>>2]>>d%4*8&15))
 return c.join("")},O.esri.Tiles.Base64Utils.wordToBase64=function(a){for(var b="=",c="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",d=[],e=0,f=4*a.length;f>e;e+=3)for(var g=(a[e>>2]>>8*(e%4)&255)<<16|(a[e+1>>2]>>8*((e+1)%4)&255)<<8|a[e+2>>2]>>8*((e+2)%4)&255,h=0;4>h;h++)8*e+6*h>32*a.length?d.push(b):d.push(c.charAt(g>>6*(3-h)&63))
-return d.join("")},O.esri.Tiles.saveAs=function(a){"use strict"
+return d.join("")},O.esri.Tiles.Base64String={compressToUTF16:function(a){var b,c,d,e=[],f=0
+for(a=this.compress(a),b=0;b<a.length;b++)switch(c=a.charCodeAt(b),f++){case 0:e.push(String.fromCharCode((c>>1)+32)),d=(1&c)<<14
+break
+case 1:e.push(String.fromCharCode(d+(c>>2)+32)),d=(3&c)<<13
+break
+case 2:e.push(String.fromCharCode(d+(c>>3)+32)),d=(7&c)<<12
+break
+case 3:e.push(String.fromCharCode(d+(c>>4)+32)),d=(15&c)<<11
+break
+case 4:e.push(String.fromCharCode(d+(c>>5)+32)),d=(31&c)<<10
+break
+case 5:e.push(String.fromCharCode(d+(c>>6)+32)),d=(63&c)<<9
+break
+case 6:e.push(String.fromCharCode(d+(c>>7)+32)),d=(127&c)<<8
+break
+case 7:e.push(String.fromCharCode(d+(c>>8)+32)),d=(255&c)<<7
+break
+case 8:e.push(String.fromCharCode(d+(c>>9)+32)),d=(511&c)<<6
+break
+case 9:e.push(String.fromCharCode(d+(c>>10)+32)),d=(1023&c)<<5
+break
+case 10:e.push(String.fromCharCode(d+(c>>11)+32)),d=(2047&c)<<4
+break
+case 11:e.push(String.fromCharCode(d+(c>>12)+32)),d=(4095&c)<<3
+break
+case 12:e.push(String.fromCharCode(d+(c>>13)+32)),d=(8191&c)<<2
+break
+case 13:e.push(String.fromCharCode(d+(c>>14)+32)),d=(16383&c)<<1
+break
+case 14:e.push(String.fromCharCode(d+(c>>15)+32,(32767&c)+32)),f=0}return e.push(String.fromCharCode(d+32)),e.join("")},decompressFromUTF16:function(a){for(var b,c,d=[],e=0,f=0;f<a.length;){switch(c=a.charCodeAt(f)-32,e++){case 0:b=c<<1
+break
+case 1:d.push(String.fromCharCode(b|c>>14)),b=(16383&c)<<2
+break
+case 2:d.push(String.fromCharCode(b|c>>13)),b=(8191&c)<<3
+break
+case 3:d.push(String.fromCharCode(b|c>>12)),b=(4095&c)<<4
+break
+case 4:d.push(String.fromCharCode(b|c>>11)),b=(2047&c)<<5
+break
+case 5:d.push(String.fromCharCode(b|c>>10)),b=(1023&c)<<6
+break
+case 6:d.push(String.fromCharCode(b|c>>9)),b=(511&c)<<7
+break
+case 7:d.push(String.fromCharCode(b|c>>8)),b=(255&c)<<8
+break
+case 8:d.push(String.fromCharCode(b|c>>7)),b=(127&c)<<9
+break
+case 9:d.push(String.fromCharCode(b|c>>6)),b=(63&c)<<10
+break
+case 10:d.push(String.fromCharCode(b|c>>5)),b=(31&c)<<11
+break
+case 11:d.push(String.fromCharCode(b|c>>4)),b=(15&c)<<12
+break
+case 12:d.push(String.fromCharCode(b|c>>3)),b=(7&c)<<13
+break
+case 13:d.push(String.fromCharCode(b|c>>2)),b=(3&c)<<14
+break
+case 14:d.push(String.fromCharCode(b|c>>1)),b=(1&c)<<15
+break
+case 15:d.push(String.fromCharCode(b|c)),e=0}f++}return this.decompress(d.join(""))},_keyStr:"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",decompress:function(a){for(var b,c,d,e,f,g,h,i=[],j=1,k=a.charCodeAt(0)>>8;j<2*a.length&&(j<2*a.length-1||0===k);)j%2===0?(b=a.charCodeAt(j/2)>>8,c=255&a.charCodeAt(j/2),d=j/2+1<a.length?a.charCodeAt(j/2+1)>>8:NaN):(b=255&a.charCodeAt((j-1)/2),(j+1)/2<a.length?(c=a.charCodeAt((j+1)/2)>>8,d=255&a.charCodeAt((j+1)/2)):c=d=NaN),j+=3,e=b>>2,f=(3&b)<<4|c>>4,g=(15&c)<<2|d>>6,h=63&d,isNaN(c)||j==2*a.length+1&&k?g=h=64:(isNaN(d)||j==2*a.length&&k)&&(h=64),i.push(this._keyStr.charAt(e)),i.push(this._keyStr.charAt(f)),i.push(this._keyStr.charAt(g)),i.push(this._keyStr.charAt(h))
+return i.join("")},compress:function(a){var b,c,d,e,f,g,h,i,j=[],k=1,l=0,m=!1
+for(a=a.replace(/[^A-Za-z0-9\+\/\=]/g,"");l<a.length;)f=this._keyStr.indexOf(a.charAt(l++)),g=this._keyStr.indexOf(a.charAt(l++)),h=this._keyStr.indexOf(a.charAt(l++)),i=this._keyStr.indexOf(a.charAt(l++)),c=f<<2|g>>4,d=(15&g)<<4|h>>2,e=(3&h)<<6|i,k%2===0?(b=c<<8,m=!0,64!=h&&(j.push(String.fromCharCode(b|d)),m=!1),64!=i&&(b=e<<8,m=!0)):(j.push(String.fromCharCode(b|c)),m=!1,64!=h&&(b=d<<8,m=!0),64!=i&&(j.push(String.fromCharCode(b|e)),m=!1)),k+=3
+return m?(j.push(String.fromCharCode(b)),j=j.join(""),j=String.fromCharCode(256|j.charCodeAt(0))+j.substring(1)):j=j.join(""),j}},O.esri.Tiles.saveAs=function(a){"use strict"
 var b=a.document,c=function(){return a.URL||a.webkitURL||a},d=a.URL||a.webkitURL||a,e=b.createElementNS("http://www.w3.org/1999/xhtml","a"),f=!a.externalHost&&"download"in e,g=a.webkitRequestFileSystem,h=a.requestFileSystem||g||a.mozRequestFileSystem,i=function(b){(a.setImmediate||a.setTimeout)(function(){throw b},0)},j="application/octet-stream",k=0,l=[],m=function(){for(var a=l.length;a--;){var b=l[a]
 "string"==typeof b?d.revokeObjectURL(b):b.remove()}l.length=0},n=function(a,b,c){b=[].concat(b)
 for(var d=b.length;d--;){var e=a["on"+b[d]]
@@ -69,10 +131,12 @@ return c.level=b.level,c.resolution=b.resolution,c.scale=b.scale,b.hasOwnPropert
 var k=new f(parseFloat(d.initialExtent.xmin),parseFloat(d.initialExtent.ymin),parseFloat(d.initialExtent.xmax),parseFloat(d.initialExtent.ymax),i),l=new f(parseFloat(d.fullExtent.xmin),parseFloat(d.fullExtent.ymin),parseFloat(d.fullExtent.xmax),parseFloat(d.fullExtent.ymax),i),m=new g(d.tileInfo),n=new h(m.origin.x,m.origin.y,i)
 m.origin=n,m.lods=j,b({initExtent:k,fullExtent:l,tileInfo:m,resultObj:d})})}},O.esri.Tiles.TilesStore=function(){this._db=null,this.dbName="offline_tile_store",this.objectStoreName="tilepath",this.isSupported=function(){return!(!window.indexedDB&&!window.openDatabase)},this.store=function(a,b){try{var c=this._db.transaction([this.objectStoreName],"readwrite")
 c.oncomplete=function(){b(!0)},c.onerror=function(a){b(!1,a.target.error.message)}
-var d=c.objectStore(this.objectStoreName),e=d.put(a)
+var d=c.objectStore(this.objectStoreName)
+a.img=O.esri.Tiles.Base64String.compress(a.img)
+var e=d.put(a)
 e.onsuccess=function(){}}catch(f){b(!1,f.stack)}},this.retrieve=function(a,b){if(null!==this._db){var c=this._db.transaction([this.objectStoreName]).objectStore(this.objectStoreName),d=c.get(a)
 d.onsuccess=function(a){var c=a.target.result
-void 0===c?b(!1,"not found"):b(!0,c)},d.onerror=function(a){b(!1,a)}}},this.deleteAll=function(a){if(null!==this._db){var b=this._db.transaction([this.objectStoreName],"readwrite").objectStore(this.objectStoreName).clear()
+void 0===c?b(!1,"not found"):(c.img=O.esri.Tiles.Base64String.decompress(c.img),b(!0,c))},d.onerror=function(a){b(!1,a)}}},this.deleteAll=function(a){if(null!==this._db){var b=this._db.transaction([this.objectStoreName],"readwrite").objectStore(this.objectStoreName).clear()
 b.onsuccess=function(){a(!0)},b.onerror=function(b){a(!1,b)}}else a(!1,null)},this["delete"]=function(a,b){if(null!==this._db){var c=this._db.transaction([this.objectStoreName],"readwrite").objectStore(this.objectStoreName)["delete"](a)
 c.onsuccess=function(){b(!0)},c.onerror=function(a){b(!1,a)}}else b(!1,null)},this.getAllTiles=function(a){if(null!==this._db){var b=this._db.transaction([this.objectStoreName]).objectStore(this.objectStoreName).openCursor()
 b.onsuccess=function(b){var c=b.target.result
diff --git a/dist/offline-tiles-advanced-src.js b/dist/offline-tiles-advanced-src.js
index fcfa5609..f9bcd488 100644
--- a/dist/offline-tiles-advanced-src.js
+++ b/dist/offline-tiles-advanced-src.js
@@ -1,4 +1,4 @@
-/*! esri-offline-maps - v3.3.0 - 2016-07-12
+/*! esri-offline-maps - v3.4.0 - 2016-09-13
 *   Copyright (c) 2016 Environmental Systems Research Institute, Inc.
 *   Apache License*/
 define([
@@ -661,6 +661,299 @@ O.esri.Tiles.Base64Utils.wordToBase64=function(/* word[] */wa){
 };
 
 /*jslint bitwise: false */
+// Copyright (c) 2013 Pieroxy <pieroxy@pieroxy.net>
+// This work is free. You can redistribute it and/or modify it
+// under the terms of the WTFPL, Version 2
+// For more information see LICENSE.txt or http://www.wtfpl.net/
+//
+// This lib is part of the lz-string project.
+// For more information, the home page:
+// http://pieroxy.net/blog/pages/lz-string/index.html
+//
+// Base64 compression / decompression for already compressed content (gif, png, jpg, mp3, ...)
+// version 1.4.1
+
+/*jslint bitwise: true */
+O.esri.Tiles.Base64String = {
+
+    compressToUTF16 : function (input) {
+        var output = [],
+            i,c,
+            current,
+            status = 0;
+
+        input = this.compress(input);
+
+        for (i=0 ; i<input.length ; i++) {
+            c = input.charCodeAt(i);
+            switch (status++) {
+                case 0:
+                    output.push(String.fromCharCode((c >> 1)+32));
+                    current = (c & 1) << 14;
+                    break;
+                case 1:
+                    output.push(String.fromCharCode((current + (c >> 2))+32));
+                    current = (c & 3) << 13;
+                    break;
+                case 2:
+                    output.push(String.fromCharCode((current + (c >> 3))+32));
+                    current = (c & 7) << 12;
+                    break;
+                case 3:
+                    output.push(String.fromCharCode((current + (c >> 4))+32));
+                    current = (c & 15) << 11;
+                    break;
+                case 4:
+                    output.push(String.fromCharCode((current + (c >> 5))+32));
+                    current = (c & 31) << 10;
+                    break;
+                case 5:
+                    output.push(String.fromCharCode((current + (c >> 6))+32));
+                    current = (c & 63) << 9;
+                    break;
+                case 6:
+                    output.push(String.fromCharCode((current + (c >> 7))+32));
+                    current = (c & 127) << 8;
+                    break;
+                case 7:
+                    output.push(String.fromCharCode((current + (c >> 8))+32));
+                    current = (c & 255) << 7;
+                    break;
+                case 8:
+                    output.push(String.fromCharCode((current + (c >> 9))+32));
+                    current = (c & 511) << 6;
+                    break;
+                case 9:
+                    output.push(String.fromCharCode((current + (c >> 10))+32));
+                    current = (c & 1023) << 5;
+                    break;
+                case 10:
+                    output.push(String.fromCharCode((current + (c >> 11))+32));
+                    current = (c & 2047) << 4;
+                    break;
+                case 11:
+                    output.push(String.fromCharCode((current + (c >> 12))+32));
+                    current = (c & 4095) << 3;
+                    break;
+                case 12:
+                    output.push(String.fromCharCode((current + (c >> 13))+32));
+                    current = (c & 8191) << 2;
+                    break;
+                case 13:
+                    output.push(String.fromCharCode((current + (c >> 14))+32));
+                    current = (c & 16383) << 1;
+                    break;
+                case 14:
+                    output.push(String.fromCharCode((current + (c >> 15))+32, (c & 32767)+32));
+                    status = 0;
+                    break;
+            }
+        }
+        output.push(String.fromCharCode(current + 32));
+        return output.join('');
+    },
+
+
+    decompressFromUTF16 : function (input) {
+        var output = [],
+            current,c,
+            status=0,
+            i = 0;
+
+        while (i < input.length) {
+            c = input.charCodeAt(i) - 32;
+
+            switch (status++) {
+                case 0:
+                    current = c << 1;
+                    break;
+                case 1:
+                    output.push(String.fromCharCode(current | (c >> 14)));
+                    current = (c&16383) << 2;
+                    break;
+                case 2:
+                    output.push(String.fromCharCode(current | (c >> 13)));
+                    current = (c&8191) << 3;
+                    break;
+                case 3:
+                    output.push(String.fromCharCode(current | (c >> 12)));
+                    current = (c&4095) << 4;
+                    break;
+                case 4:
+                    output.push(String.fromCharCode(current | (c >> 11)));
+                    current = (c&2047) << 5;
+                    break;
+                case 5:
+                    output.push(String.fromCharCode(current | (c >> 10)));
+                    current = (c&1023) << 6;
+                    break;
+                case 6:
+                    output.push(String.fromCharCode(current | (c >> 9)));
+                    current = (c&511) << 7;
+                    break;
+                case 7:
+                    output.push(String.fromCharCode(current | (c >> 8)));
+                    current = (c&255) << 8;
+                    break;
+                case 8:
+                    output.push(String.fromCharCode(current | (c >> 7)));
+                    current = (c&127) << 9;
+                    break;
+                case 9:
+                    output.push(String.fromCharCode(current | (c >> 6)));
+                    current = (c&63) << 10;
+                    break;
+                case 10:
+                    output.push(String.fromCharCode(current | (c >> 5)));
+                    current = (c&31) << 11;
+                    break;
+                case 11:
+                    output.push(String.fromCharCode(current | (c >> 4)));
+                    current = (c&15) << 12;
+                    break;
+                case 12:
+                    output.push(String.fromCharCode(current | (c >> 3)));
+                    current = (c&7) << 13;
+                    break;
+                case 13:
+                    output.push(String.fromCharCode(current | (c >> 2)));
+                    current = (c&3) << 14;
+                    break;
+                case 14:
+                    output.push(String.fromCharCode(current | (c >> 1)));
+                    current = (c&1) << 15;
+                    break;
+                case 15:
+                    output.push(String.fromCharCode(current | c));
+                    status=0;
+                    break;
+            }
+
+
+            i++;
+        }
+
+        return this.decompress(output.join(''));
+        //return output;
+
+    },
+
+
+    // private property
+    _keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=", // jshint ignore:line
+
+    decompress : function (input) {
+        var output = [];
+        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
+        var i = 1;
+        var odd = input.charCodeAt(0) >> 8;
+
+        while (i < input.length*2 && (i < input.length*2-1 || odd===0)) {
+
+            if (i%2===0) {
+                chr1 = input.charCodeAt(i/2) >> 8;
+                chr2 = input.charCodeAt(i/2) & 255;
+                if (i/2+1 < input.length) {
+                    chr3 = input.charCodeAt(i / 2 + 1) >> 8;
+                }
+                else {
+                    chr3 = NaN;
+                }
+            } else {
+                chr1 = input.charCodeAt((i-1)/2) & 255;
+                if ((i+1)/2 < input.length) {
+                    chr2 = input.charCodeAt((i+1)/2) >> 8;
+                    chr3 = input.charCodeAt((i+1)/2) & 255;
+                } else {
+                    chr2 = chr3 = NaN;
+                }
+            }
+            i+=3;
+
+            enc1 = chr1 >> 2;
+            enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
+            enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
+            enc4 = chr3 & 63;
+
+            if (isNaN(chr2) || (i==input.length*2+1 && odd)) {
+                enc3 = enc4 = 64;
+            } else if (isNaN(chr3) || (i==input.length*2 && odd)) {
+                enc4 = 64;
+            }
+
+            output.push(this._keyStr.charAt(enc1));
+            output.push(this._keyStr.charAt(enc2));
+            output.push(this._keyStr.charAt(enc3));
+            output.push(this._keyStr.charAt(enc4));
+        }
+
+        return output.join('');
+    },
+
+    compress : function (input) {
+        var output = [],
+            ol = 1,
+            output_,
+            chr1, chr2, chr3,
+            enc1, enc2, enc3, enc4,
+            i = 0, flush=false;
+
+        input = input.replace(/[^A-Za-z0-9\+\/\=]/g, ""); // jshint ignore:line
+
+        while (i < input.length) {
+
+            enc1 = this._keyStr.indexOf(input.charAt(i++));
+            enc2 = this._keyStr.indexOf(input.charAt(i++));
+            enc3 = this._keyStr.indexOf(input.charAt(i++));
+            enc4 = this._keyStr.indexOf(input.charAt(i++));
+
+            chr1 = (enc1 << 2) | (enc2 >> 4);
+            chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
+            chr3 = ((enc3 & 3) << 6) | enc4;
+
+            if (ol%2===0) {
+                output_ = chr1 << 8;
+                flush = true;
+
+                if (enc3 != 64) {
+                    output.push(String.fromCharCode(output_ | chr2));
+                    flush = false;
+                }
+                if (enc4 != 64) {
+                    output_ = chr3 << 8;
+                    flush = true;
+                }
+            } else {
+                output.push(String.fromCharCode(output_ | chr1));
+                flush = false;
+
+                if (enc3 != 64) {
+                    output_ = chr2 << 8;
+                    flush = true;
+                }
+                if (enc4 != 64) {
+                    output.push(String.fromCharCode(output_ | chr3));
+                    flush = false;
+                }
+            }
+            ol+=3;
+        }
+
+        if (flush) {
+            output.push(String.fromCharCode(output_));
+            output = output.join('');
+            output = String.fromCharCode(output.charCodeAt(0)|256) + output.substring(1);
+        } else {
+            output = output.join('');
+        }
+
+        return output;
+
+    }
+};
+
+/*jslint bitwise: false */
+
 /* FileSaver.js
  * A saveAs() FileSaver implementation.
  * 2013-10-21
@@ -918,7 +1211,7 @@ O.esri.Tiles.TilesCore = function(){
      */
     this._getTiles = function(image,imageType,url,tileid,store,query,showBlankTiles){
         store.retrieve(url, function(success, offlineTile)
-        { console.log("TILE RETURN " + success + ", " + offlineTile.url);
+        { console.log("TILE RETURN " + success + ", " + offlineTile.url + ", " + tileid);
             /* when the .getTileUrl() callback is triggered we replace the temporary URL originally returned by the data:image url */
             // search for the img with src="void:"+level+"-"+row+"-"+col and replace with actual url
             image = query("img[src="+tileid+"]")[0];
@@ -1348,6 +1641,7 @@ O.esri.Tiles.TilesStore = function(){
             };
 
             var objectStore = transaction.objectStore(this.objectStoreName);
+            urlDataPair.img = O.esri.Tiles.Base64String.compress(urlDataPair.img);
             var request = objectStore.put(urlDataPair);
             request.onsuccess = function()
             {
@@ -1381,6 +1675,7 @@ O.esri.Tiles.TilesStore = function(){
                 }
                 else
                 {
+                    result.img = O.esri.Tiles.Base64String.decompress(result.img);
                     callback(true,result);
                 }
             };
diff --git a/dist/offline-tiles-basic-min.js b/dist/offline-tiles-basic-min.js
index f83c8aa7..8201b180 100644
--- a/dist/offline-tiles-basic-min.js
+++ b/dist/offline-tiles-basic-min.js
@@ -19,7 +19,69 @@ return d<<16|65535&c},O.esri.Tiles.Base64Utils.stringToWord=function(a){for(var
 return d},O.esri.Tiles.Base64Utils.wordToString=function(a){for(var b=8,c=(1<<b)-1,d=[],e=0,f=32*a.length;f>e;e+=b)d.push(String.fromCharCode(a[e>>5]>>>e%32&c))
 return d.join("")},O.esri.Tiles.Base64Utils.wordToHex=function(a){for(var b="0123456789abcdef",c=[],d=0,e=4*a.length;e>d;d++)c.push(b.charAt(a[d>>2]>>d%4*8+4&15)+b.charAt(a[d>>2]>>d%4*8&15))
 return c.join("")},O.esri.Tiles.Base64Utils.wordToBase64=function(a){for(var b="=",c="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",d=[],e=0,f=4*a.length;f>e;e+=3)for(var g=(a[e>>2]>>8*(e%4)&255)<<16|(a[e+1>>2]>>8*((e+1)%4)&255)<<8|a[e+2>>2]>>8*((e+2)%4)&255,h=0;4>h;h++)8*e+6*h>32*a.length?d.push(b):d.push(c.charAt(g>>6*(3-h)&63))
-return d.join("")},O.esri.Tiles.saveAs=function(a){"use strict"
+return d.join("")},O.esri.Tiles.Base64String={compressToUTF16:function(a){var b,c,d,e=[],f=0
+for(a=this.compress(a),b=0;b<a.length;b++)switch(c=a.charCodeAt(b),f++){case 0:e.push(String.fromCharCode((c>>1)+32)),d=(1&c)<<14
+break
+case 1:e.push(String.fromCharCode(d+(c>>2)+32)),d=(3&c)<<13
+break
+case 2:e.push(String.fromCharCode(d+(c>>3)+32)),d=(7&c)<<12
+break
+case 3:e.push(String.fromCharCode(d+(c>>4)+32)),d=(15&c)<<11
+break
+case 4:e.push(String.fromCharCode(d+(c>>5)+32)),d=(31&c)<<10
+break
+case 5:e.push(String.fromCharCode(d+(c>>6)+32)),d=(63&c)<<9
+break
+case 6:e.push(String.fromCharCode(d+(c>>7)+32)),d=(127&c)<<8
+break
+case 7:e.push(String.fromCharCode(d+(c>>8)+32)),d=(255&c)<<7
+break
+case 8:e.push(String.fromCharCode(d+(c>>9)+32)),d=(511&c)<<6
+break
+case 9:e.push(String.fromCharCode(d+(c>>10)+32)),d=(1023&c)<<5
+break
+case 10:e.push(String.fromCharCode(d+(c>>11)+32)),d=(2047&c)<<4
+break
+case 11:e.push(String.fromCharCode(d+(c>>12)+32)),d=(4095&c)<<3
+break
+case 12:e.push(String.fromCharCode(d+(c>>13)+32)),d=(8191&c)<<2
+break
+case 13:e.push(String.fromCharCode(d+(c>>14)+32)),d=(16383&c)<<1
+break
+case 14:e.push(String.fromCharCode(d+(c>>15)+32,(32767&c)+32)),f=0}return e.push(String.fromCharCode(d+32)),e.join("")},decompressFromUTF16:function(a){for(var b,c,d=[],e=0,f=0;f<a.length;){switch(c=a.charCodeAt(f)-32,e++){case 0:b=c<<1
+break
+case 1:d.push(String.fromCharCode(b|c>>14)),b=(16383&c)<<2
+break
+case 2:d.push(String.fromCharCode(b|c>>13)),b=(8191&c)<<3
+break
+case 3:d.push(String.fromCharCode(b|c>>12)),b=(4095&c)<<4
+break
+case 4:d.push(String.fromCharCode(b|c>>11)),b=(2047&c)<<5
+break
+case 5:d.push(String.fromCharCode(b|c>>10)),b=(1023&c)<<6
+break
+case 6:d.push(String.fromCharCode(b|c>>9)),b=(511&c)<<7
+break
+case 7:d.push(String.fromCharCode(b|c>>8)),b=(255&c)<<8
+break
+case 8:d.push(String.fromCharCode(b|c>>7)),b=(127&c)<<9
+break
+case 9:d.push(String.fromCharCode(b|c>>6)),b=(63&c)<<10
+break
+case 10:d.push(String.fromCharCode(b|c>>5)),b=(31&c)<<11
+break
+case 11:d.push(String.fromCharCode(b|c>>4)),b=(15&c)<<12
+break
+case 12:d.push(String.fromCharCode(b|c>>3)),b=(7&c)<<13
+break
+case 13:d.push(String.fromCharCode(b|c>>2)),b=(3&c)<<14
+break
+case 14:d.push(String.fromCharCode(b|c>>1)),b=(1&c)<<15
+break
+case 15:d.push(String.fromCharCode(b|c)),e=0}f++}return this.decompress(d.join(""))},_keyStr:"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",decompress:function(a){for(var b,c,d,e,f,g,h,i=[],j=1,k=a.charCodeAt(0)>>8;j<2*a.length&&(j<2*a.length-1||0===k);)j%2===0?(b=a.charCodeAt(j/2)>>8,c=255&a.charCodeAt(j/2),d=j/2+1<a.length?a.charCodeAt(j/2+1)>>8:NaN):(b=255&a.charCodeAt((j-1)/2),(j+1)/2<a.length?(c=a.charCodeAt((j+1)/2)>>8,d=255&a.charCodeAt((j+1)/2)):c=d=NaN),j+=3,e=b>>2,f=(3&b)<<4|c>>4,g=(15&c)<<2|d>>6,h=63&d,isNaN(c)||j==2*a.length+1&&k?g=h=64:(isNaN(d)||j==2*a.length&&k)&&(h=64),i.push(this._keyStr.charAt(e)),i.push(this._keyStr.charAt(f)),i.push(this._keyStr.charAt(g)),i.push(this._keyStr.charAt(h))
+return i.join("")},compress:function(a){var b,c,d,e,f,g,h,i,j=[],k=1,l=0,m=!1
+for(a=a.replace(/[^A-Za-z0-9\+\/\=]/g,"");l<a.length;)f=this._keyStr.indexOf(a.charAt(l++)),g=this._keyStr.indexOf(a.charAt(l++)),h=this._keyStr.indexOf(a.charAt(l++)),i=this._keyStr.indexOf(a.charAt(l++)),c=f<<2|g>>4,d=(15&g)<<4|h>>2,e=(3&h)<<6|i,k%2===0?(b=c<<8,m=!0,64!=h&&(j.push(String.fromCharCode(b|d)),m=!1),64!=i&&(b=e<<8,m=!0)):(j.push(String.fromCharCode(b|c)),m=!1,64!=h&&(b=d<<8,m=!0),64!=i&&(j.push(String.fromCharCode(b|e)),m=!1)),k+=3
+return m?(j.push(String.fromCharCode(b)),j=j.join(""),j=String.fromCharCode(256|j.charCodeAt(0))+j.substring(1)):j=j.join(""),j}},O.esri.Tiles.saveAs=function(a){"use strict"
 var b=a.document,c=function(){return a.URL||a.webkitURL||a},d=a.URL||a.webkitURL||a,e=b.createElementNS("http://www.w3.org/1999/xhtml","a"),f=!a.externalHost&&"download"in e,g=a.webkitRequestFileSystem,h=a.requestFileSystem||g||a.mozRequestFileSystem,i=function(b){(a.setImmediate||a.setTimeout)(function(){throw b},0)},j="application/octet-stream",k=0,l=[],m=function(){for(var a=l.length;a--;){var b=l[a]
 "string"==typeof b?d.revokeObjectURL(b):b.remove()}l.length=0},n=function(a,b,c){b=[].concat(b)
 for(var d=b.length;d--;){var e=a["on"+b[d]]
@@ -58,10 +120,12 @@ return c.level=b.level,c.resolution=b.resolution,c.scale=b.scale,b.hasOwnPropert
 var k=new f(parseFloat(d.initialExtent.xmin),parseFloat(d.initialExtent.ymin),parseFloat(d.initialExtent.xmax),parseFloat(d.initialExtent.ymax),i),l=new f(parseFloat(d.fullExtent.xmin),parseFloat(d.fullExtent.ymin),parseFloat(d.fullExtent.xmax),parseFloat(d.fullExtent.ymax),i),m=new g(d.tileInfo),n=new h(m.origin.x,m.origin.y,i)
 m.origin=n,m.lods=j,b({initExtent:k,fullExtent:l,tileInfo:m,resultObj:d})})}},O.esri.Tiles.TilesStore=function(){this._db=null,this.dbName="offline_tile_store",this.objectStoreName="tilepath",this.isSupported=function(){return!(!window.indexedDB&&!window.openDatabase)},this.store=function(a,b){try{var c=this._db.transaction([this.objectStoreName],"readwrite")
 c.oncomplete=function(){b(!0)},c.onerror=function(a){b(!1,a.target.error.message)}
-var d=c.objectStore(this.objectStoreName),e=d.put(a)
+var d=c.objectStore(this.objectStoreName)
+a.img=O.esri.Tiles.Base64String.compress(a.img)
+var e=d.put(a)
 e.onsuccess=function(){}}catch(f){b(!1,f.stack)}},this.retrieve=function(a,b){if(null!==this._db){var c=this._db.transaction([this.objectStoreName]).objectStore(this.objectStoreName),d=c.get(a)
 d.onsuccess=function(a){var c=a.target.result
-void 0===c?b(!1,"not found"):b(!0,c)},d.onerror=function(a){b(!1,a)}}},this.deleteAll=function(a){if(null!==this._db){var b=this._db.transaction([this.objectStoreName],"readwrite").objectStore(this.objectStoreName).clear()
+void 0===c?b(!1,"not found"):(c.img=O.esri.Tiles.Base64String.decompress(c.img),b(!0,c))},d.onerror=function(a){b(!1,a)}}},this.deleteAll=function(a){if(null!==this._db){var b=this._db.transaction([this.objectStoreName],"readwrite").objectStore(this.objectStoreName).clear()
 b.onsuccess=function(){a(!0)},b.onerror=function(b){a(!1,b)}}else a(!1,null)},this["delete"]=function(a,b){if(null!==this._db){var c=this._db.transaction([this.objectStoreName],"readwrite").objectStore(this.objectStoreName)["delete"](a)
 c.onsuccess=function(){b(!0)},c.onerror=function(a){b(!1,a)}}else b(!1,null)},this.getAllTiles=function(a){if(null!==this._db){var b=this._db.transaction([this.objectStoreName]).objectStore(this.objectStoreName).openCursor()
 b.onsuccess=function(b){var c=b.target.result
diff --git a/dist/offline-tiles-basic-src.js b/dist/offline-tiles-basic-src.js
index 769fba4e..5ba52b58 100644
--- a/dist/offline-tiles-basic-src.js
+++ b/dist/offline-tiles-basic-src.js
@@ -1,4 +1,4 @@
-/*! esri-offline-maps - v3.3.0 - 2016-07-12
+/*! esri-offline-maps - v3.4.0 - 2016-09-13
 *   Copyright (c) 2016 Environmental Systems Research Institute, Inc.
 *   Apache License*/
 define([
@@ -492,6 +492,299 @@ O.esri.Tiles.Base64Utils.wordToBase64=function(/* word[] */wa){
 };
 
 /*jslint bitwise: false */
+// Copyright (c) 2013 Pieroxy <pieroxy@pieroxy.net>
+// This work is free. You can redistribute it and/or modify it
+// under the terms of the WTFPL, Version 2
+// For more information see LICENSE.txt or http://www.wtfpl.net/
+//
+// This lib is part of the lz-string project.
+// For more information, the home page:
+// http://pieroxy.net/blog/pages/lz-string/index.html
+//
+// Base64 compression / decompression for already compressed content (gif, png, jpg, mp3, ...)
+// version 1.4.1
+
+/*jslint bitwise: true */
+O.esri.Tiles.Base64String = {
+
+    compressToUTF16 : function (input) {
+        var output = [],
+            i,c,
+            current,
+            status = 0;
+
+        input = this.compress(input);
+
+        for (i=0 ; i<input.length ; i++) {
+            c = input.charCodeAt(i);
+            switch (status++) {
+                case 0:
+                    output.push(String.fromCharCode((c >> 1)+32));
+                    current = (c & 1) << 14;
+                    break;
+                case 1:
+                    output.push(String.fromCharCode((current + (c >> 2))+32));
+                    current = (c & 3) << 13;
+                    break;
+                case 2:
+                    output.push(String.fromCharCode((current + (c >> 3))+32));
+                    current = (c & 7) << 12;
+                    break;
+                case 3:
+                    output.push(String.fromCharCode((current + (c >> 4))+32));
+                    current = (c & 15) << 11;
+                    break;
+                case 4:
+                    output.push(String.fromCharCode((current + (c >> 5))+32));
+                    current = (c & 31) << 10;
+                    break;
+                case 5:
+                    output.push(String.fromCharCode((current + (c >> 6))+32));
+                    current = (c & 63) << 9;
+                    break;
+                case 6:
+                    output.push(String.fromCharCode((current + (c >> 7))+32));
+                    current = (c & 127) << 8;
+                    break;
+                case 7:
+                    output.push(String.fromCharCode((current + (c >> 8))+32));
+                    current = (c & 255) << 7;
+                    break;
+                case 8:
+                    output.push(String.fromCharCode((current + (c >> 9))+32));
+                    current = (c & 511) << 6;
+                    break;
+                case 9:
+                    output.push(String.fromCharCode((current + (c >> 10))+32));
+                    current = (c & 1023) << 5;
+                    break;
+                case 10:
+                    output.push(String.fromCharCode((current + (c >> 11))+32));
+                    current = (c & 2047) << 4;
+                    break;
+                case 11:
+                    output.push(String.fromCharCode((current + (c >> 12))+32));
+                    current = (c & 4095) << 3;
+                    break;
+                case 12:
+                    output.push(String.fromCharCode((current + (c >> 13))+32));
+                    current = (c & 8191) << 2;
+                    break;
+                case 13:
+                    output.push(String.fromCharCode((current + (c >> 14))+32));
+                    current = (c & 16383) << 1;
+                    break;
+                case 14:
+                    output.push(String.fromCharCode((current + (c >> 15))+32, (c & 32767)+32));
+                    status = 0;
+                    break;
+            }
+        }
+        output.push(String.fromCharCode(current + 32));
+        return output.join('');
+    },
+
+
+    decompressFromUTF16 : function (input) {
+        var output = [],
+            current,c,
+            status=0,
+            i = 0;
+
+        while (i < input.length) {
+            c = input.charCodeAt(i) - 32;
+
+            switch (status++) {
+                case 0:
+                    current = c << 1;
+                    break;
+                case 1:
+                    output.push(String.fromCharCode(current | (c >> 14)));
+                    current = (c&16383) << 2;
+                    break;
+                case 2:
+                    output.push(String.fromCharCode(current | (c >> 13)));
+                    current = (c&8191) << 3;
+                    break;
+                case 3:
+                    output.push(String.fromCharCode(current | (c >> 12)));
+                    current = (c&4095) << 4;
+                    break;
+                case 4:
+                    output.push(String.fromCharCode(current | (c >> 11)));
+                    current = (c&2047) << 5;
+                    break;
+                case 5:
+                    output.push(String.fromCharCode(current | (c >> 10)));
+                    current = (c&1023) << 6;
+                    break;
+                case 6:
+                    output.push(String.fromCharCode(current | (c >> 9)));
+                    current = (c&511) << 7;
+                    break;
+                case 7:
+                    output.push(String.fromCharCode(current | (c >> 8)));
+                    current = (c&255) << 8;
+                    break;
+                case 8:
+                    output.push(String.fromCharCode(current | (c >> 7)));
+                    current = (c&127) << 9;
+                    break;
+                case 9:
+                    output.push(String.fromCharCode(current | (c >> 6)));
+                    current = (c&63) << 10;
+                    break;
+                case 10:
+                    output.push(String.fromCharCode(current | (c >> 5)));
+                    current = (c&31) << 11;
+                    break;
+                case 11:
+                    output.push(String.fromCharCode(current | (c >> 4)));
+                    current = (c&15) << 12;
+                    break;
+                case 12:
+                    output.push(String.fromCharCode(current | (c >> 3)));
+                    current = (c&7) << 13;
+                    break;
+                case 13:
+                    output.push(String.fromCharCode(current | (c >> 2)));
+                    current = (c&3) << 14;
+                    break;
+                case 14:
+                    output.push(String.fromCharCode(current | (c >> 1)));
+                    current = (c&1) << 15;
+                    break;
+                case 15:
+                    output.push(String.fromCharCode(current | c));
+                    status=0;
+                    break;
+            }
+
+
+            i++;
+        }
+
+        return this.decompress(output.join(''));
+        //return output;
+
+    },
+
+
+    // private property
+    _keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=", // jshint ignore:line
+
+    decompress : function (input) {
+        var output = [];
+        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
+        var i = 1;
+        var odd = input.charCodeAt(0) >> 8;
+
+        while (i < input.length*2 && (i < input.length*2-1 || odd===0)) {
+
+            if (i%2===0) {
+                chr1 = input.charCodeAt(i/2) >> 8;
+                chr2 = input.charCodeAt(i/2) & 255;
+                if (i/2+1 < input.length) {
+                    chr3 = input.charCodeAt(i / 2 + 1) >> 8;
+                }
+                else {
+                    chr3 = NaN;
+                }
+            } else {
+                chr1 = input.charCodeAt((i-1)/2) & 255;
+                if ((i+1)/2 < input.length) {
+                    chr2 = input.charCodeAt((i+1)/2) >> 8;
+                    chr3 = input.charCodeAt((i+1)/2) & 255;
+                } else {
+                    chr2 = chr3 = NaN;
+                }
+            }
+            i+=3;
+
+            enc1 = chr1 >> 2;
+            enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
+            enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
+            enc4 = chr3 & 63;
+
+            if (isNaN(chr2) || (i==input.length*2+1 && odd)) {
+                enc3 = enc4 = 64;
+            } else if (isNaN(chr3) || (i==input.length*2 && odd)) {
+                enc4 = 64;
+            }
+
+            output.push(this._keyStr.charAt(enc1));
+            output.push(this._keyStr.charAt(enc2));
+            output.push(this._keyStr.charAt(enc3));
+            output.push(this._keyStr.charAt(enc4));
+        }
+
+        return output.join('');
+    },
+
+    compress : function (input) {
+        var output = [],
+            ol = 1,
+            output_,
+            chr1, chr2, chr3,
+            enc1, enc2, enc3, enc4,
+            i = 0, flush=false;
+
+        input = input.replace(/[^A-Za-z0-9\+\/\=]/g, ""); // jshint ignore:line
+
+        while (i < input.length) {
+
+            enc1 = this._keyStr.indexOf(input.charAt(i++));
+            enc2 = this._keyStr.indexOf(input.charAt(i++));
+            enc3 = this._keyStr.indexOf(input.charAt(i++));
+            enc4 = this._keyStr.indexOf(input.charAt(i++));
+
+            chr1 = (enc1 << 2) | (enc2 >> 4);
+            chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
+            chr3 = ((enc3 & 3) << 6) | enc4;
+
+            if (ol%2===0) {
+                output_ = chr1 << 8;
+                flush = true;
+
+                if (enc3 != 64) {
+                    output.push(String.fromCharCode(output_ | chr2));
+                    flush = false;
+                }
+                if (enc4 != 64) {
+                    output_ = chr3 << 8;
+                    flush = true;
+                }
+            } else {
+                output.push(String.fromCharCode(output_ | chr1));
+                flush = false;
+
+                if (enc3 != 64) {
+                    output_ = chr2 << 8;
+                    flush = true;
+                }
+                if (enc4 != 64) {
+                    output.push(String.fromCharCode(output_ | chr3));
+                    flush = false;
+                }
+            }
+            ol+=3;
+        }
+
+        if (flush) {
+            output.push(String.fromCharCode(output_));
+            output = output.join('');
+            output = String.fromCharCode(output.charCodeAt(0)|256) + output.substring(1);
+        } else {
+            output = output.join('');
+        }
+
+        return output;
+
+    }
+};
+
+/*jslint bitwise: false */
+
 /* FileSaver.js
  * A saveAs() FileSaver implementation.
  * 2013-10-21
@@ -749,7 +1042,7 @@ O.esri.Tiles.TilesCore = function(){
      */
     this._getTiles = function(image,imageType,url,tileid,store,query,showBlankTiles){
         store.retrieve(url, function(success, offlineTile)
-        { console.log("TILE RETURN " + success + ", " + offlineTile.url);
+        { console.log("TILE RETURN " + success + ", " + offlineTile.url + ", " + tileid);
             /* when the .getTileUrl() callback is triggered we replace the temporary URL originally returned by the data:image url */
             // search for the img with src="void:"+level+"-"+row+"-"+col and replace with actual url
             image = query("img[src="+tileid+"]")[0];
@@ -1179,6 +1472,7 @@ O.esri.Tiles.TilesStore = function(){
             };
 
             var objectStore = transaction.objectStore(this.objectStoreName);
+            urlDataPair.img = O.esri.Tiles.Base64String.compress(urlDataPair.img);
             var request = objectStore.put(urlDataPair);
             request.onsuccess = function()
             {
@@ -1212,6 +1506,7 @@ O.esri.Tiles.TilesStore = function(){
                 }
                 else
                 {
+                    result.img = O.esri.Tiles.Base64String.decompress(result.img);
                     callback(true,result);
                 }
             };
diff --git a/dist/offline-tpk-min.js b/dist/offline-tpk-min.js
index ae7c08a5..4b6e7381 100644
--- a/dist/offline-tpk-min.js
+++ b/dist/offline-tpk-min.js
@@ -51,10 +51,12 @@ return 1===b.length?"000"+b:2===b.length?"00"+b:3===b.length?"0"+b:b.substr(0,b.
 return 16+5*f},_getCacheFilePath:function(a,b,c,d){var e=[]
 return e.push(a),e.push("/"),e.push("L"),e.push(10>b?"0"+b:b),e.push("/"),e.push("R"),e.push(this._int2HexString(c)),e.push("C"),e.push(this._int2HexString(d)),e.join("")},_bytes2MBs:function(a){return(a>>>20)+"."+(2046&a)}})}),"undefined"!=typeof O?O.esri.TPK={}:(O={},O.esri={TPK:{},Tiles:{}}),O.esri.Tiles.TilesStore=function(){this._db=null,this.dbName="offline_tile_store",this.objectStoreName="tilepath",this.isSupported=function(){return!(!window.indexedDB&&!window.openDatabase)},this.store=function(a,b){try{var c=this._db.transaction([this.objectStoreName],"readwrite")
 c.oncomplete=function(){b(!0)},c.onerror=function(a){b(!1,a.target.error.message)}
-var d=c.objectStore(this.objectStoreName),e=d.put(a)
+var d=c.objectStore(this.objectStoreName)
+a.img=O.esri.Tiles.Base64String.compress(a.img)
+var e=d.put(a)
 e.onsuccess=function(){}}catch(f){b(!1,f.stack)}},this.retrieve=function(a,b){if(null!==this._db){var c=this._db.transaction([this.objectStoreName]).objectStore(this.objectStoreName),d=c.get(a)
 d.onsuccess=function(a){var c=a.target.result
-void 0===c?b(!1,"not found"):b(!0,c)},d.onerror=function(a){b(!1,a)}}},this.deleteAll=function(a){if(null!==this._db){var b=this._db.transaction([this.objectStoreName],"readwrite").objectStore(this.objectStoreName).clear()
+void 0===c?b(!1,"not found"):(c.img=O.esri.Tiles.Base64String.decompress(c.img),b(!0,c))},d.onerror=function(a){b(!1,a)}}},this.deleteAll=function(a){if(null!==this._db){var b=this._db.transaction([this.objectStoreName],"readwrite").objectStore(this.objectStoreName).clear()
 b.onsuccess=function(){a(!0)},b.onerror=function(b){a(!1,b)}}else a(!1,null)},this["delete"]=function(a,b){if(null!==this._db){var c=this._db.transaction([this.objectStoreName],"readwrite").objectStore(this.objectStoreName)["delete"](a)
 c.onsuccess=function(){b(!0)},c.onerror=function(a){b(!1,a)}}else b(!1,null)},this.getAllTiles=function(a){if(null!==this._db){var b=this._db.transaction([this.objectStoreName]).objectStore(this.objectStoreName).openCursor()
 b.onsuccess=function(b){var c=b.target.result
diff --git a/dist/offline-tpk-src.js b/dist/offline-tpk-src.js
index 6fd468f7..40a00a83 100644
--- a/dist/offline-tpk-src.js
+++ b/dist/offline-tpk-src.js
@@ -1,4 +1,4 @@
-/*! esri-offline-maps - v3.3.0 - 2016-07-12
+/*! esri-offline-maps - v3.4.0 - 2016-09-13
 *   Copyright (c) 2016 Environmental Systems Research Institute, Inc.
 *   Apache License*/
 /**
@@ -794,6 +794,7 @@ O.esri.Tiles.TilesStore = function(){
             };
 
             var objectStore = transaction.objectStore(this.objectStoreName);
+            urlDataPair.img = O.esri.Tiles.Base64String.compress(urlDataPair.img);
             var request = objectStore.put(urlDataPair);
             request.onsuccess = function()
             {
@@ -827,6 +828,7 @@ O.esri.Tiles.TilesStore = function(){
                 }
                 else
                 {
+                    result.img = O.esri.Tiles.Base64String.decompress(result.img);
                     callback(true,result);
                 }
             };
diff --git a/lib/tiles/LICENSE.md b/lib/tiles/LICENSE.md
index 5300273b..d2eadabf 100644
--- a/lib/tiles/LICENSE.md
+++ b/lib/tiles/LICENSE.md
@@ -1,11 +1,16 @@
+## base64String.js
+License for base64String.js is WTFPL, Version 2, http://www.wtfpl.net/ and provided courtesy and copyright of Pieroxy <pieroxy@pieroxy.net>.
+
+
+## FileSaver.js
+
 License for FileSaver.js
 
 This software is licensed under the MIT/X11 license.
 
 MIT/X11 license
----------------
 
-Copyright &copy; 2011 [Eli Grey][1].
+Copyright &copy; 2011 [Eli Grey] http://eligrey.com
 
 Permission is hereby granted, free of charge, to any person
 obtaining a copy of this software and associated documentation
@@ -26,7 +31,4 @@ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
-OTHER DEALINGS IN THE SOFTWARE.
-
-
-  [1]: http://eligrey.com
\ No newline at end of file
+OTHER DEALINGS IN THE SOFTWARE.
\ No newline at end of file
diff --git a/lib/tiles/TilesCore.js b/lib/tiles/TilesCore.js
index a9f88b92..185542fc 100644
--- a/lib/tiles/TilesCore.js
+++ b/lib/tiles/TilesCore.js
@@ -18,7 +18,7 @@ O.esri.Tiles.TilesCore = function(){
      */
     this._getTiles = function(image,imageType,url,tileid,store,query,showBlankTiles){
         store.retrieve(url, function(success, offlineTile)
-        { console.log("TILE RETURN " + success + ", " + offlineTile.url);
+        { console.log("TILE RETURN " + success + ", " + offlineTile.url + ", " + tileid);
             /* when the .getTileUrl() callback is triggered we replace the temporary URL originally returned by the data:image url */
             // search for the img with src="void:"+level+"-"+row+"-"+col and replace with actual url
             image = query("img[src="+tileid+"]")[0];
diff --git a/lib/tiles/TilesStore.js b/lib/tiles/TilesStore.js
index 08dd376a..861f1778 100644
--- a/lib/tiles/TilesStore.js
+++ b/lib/tiles/TilesStore.js
@@ -53,6 +53,7 @@ O.esri.Tiles.TilesStore = function(){
             };
 
             var objectStore = transaction.objectStore(this.objectStoreName);
+            urlDataPair.img = O.esri.Tiles.Base64String.compress(urlDataPair.img);
             var request = objectStore.put(urlDataPair);
             request.onsuccess = function()
             {
@@ -86,6 +87,7 @@ O.esri.Tiles.TilesStore = function(){
                 }
                 else
                 {
+                    result.img = O.esri.Tiles.Base64String.decompress(result.img);
                     callback(true,result);
                 }
             };
diff --git a/lib/tiles/base64string.js b/lib/tiles/base64string.js
new file mode 100644
index 00000000..7a4e8630
--- /dev/null
+++ b/lib/tiles/base64string.js
@@ -0,0 +1,292 @@
+// Copyright (c) 2013 Pieroxy <pieroxy@pieroxy.net>
+// This work is free. You can redistribute it and/or modify it
+// under the terms of the WTFPL, Version 2
+// For more information see LICENSE.txt or http://www.wtfpl.net/
+//
+// This lib is part of the lz-string project.
+// For more information, the home page:
+// http://pieroxy.net/blog/pages/lz-string/index.html
+//
+// Base64 compression / decompression for already compressed content (gif, png, jpg, mp3, ...)
+// version 1.4.1
+
+/*jslint bitwise: true */
+O.esri.Tiles.Base64String = {
+
+    compressToUTF16 : function (input) {
+        var output = [],
+            i,c,
+            current,
+            status = 0;
+
+        input = this.compress(input);
+
+        for (i=0 ; i<input.length ; i++) {
+            c = input.charCodeAt(i);
+            switch (status++) {
+                case 0:
+                    output.push(String.fromCharCode((c >> 1)+32));
+                    current = (c & 1) << 14;
+                    break;
+                case 1:
+                    output.push(String.fromCharCode((current + (c >> 2))+32));
+                    current = (c & 3) << 13;
+                    break;
+                case 2:
+                    output.push(String.fromCharCode((current + (c >> 3))+32));
+                    current = (c & 7) << 12;
+                    break;
+                case 3:
+                    output.push(String.fromCharCode((current + (c >> 4))+32));
+                    current = (c & 15) << 11;
+                    break;
+                case 4:
+                    output.push(String.fromCharCode((current + (c >> 5))+32));
+                    current = (c & 31) << 10;
+                    break;
+                case 5:
+                    output.push(String.fromCharCode((current + (c >> 6))+32));
+                    current = (c & 63) << 9;
+                    break;
+                case 6:
+                    output.push(String.fromCharCode((current + (c >> 7))+32));
+                    current = (c & 127) << 8;
+                    break;
+                case 7:
+                    output.push(String.fromCharCode((current + (c >> 8))+32));
+                    current = (c & 255) << 7;
+                    break;
+                case 8:
+                    output.push(String.fromCharCode((current + (c >> 9))+32));
+                    current = (c & 511) << 6;
+                    break;
+                case 9:
+                    output.push(String.fromCharCode((current + (c >> 10))+32));
+                    current = (c & 1023) << 5;
+                    break;
+                case 10:
+                    output.push(String.fromCharCode((current + (c >> 11))+32));
+                    current = (c & 2047) << 4;
+                    break;
+                case 11:
+                    output.push(String.fromCharCode((current + (c >> 12))+32));
+                    current = (c & 4095) << 3;
+                    break;
+                case 12:
+                    output.push(String.fromCharCode((current + (c >> 13))+32));
+                    current = (c & 8191) << 2;
+                    break;
+                case 13:
+                    output.push(String.fromCharCode((current + (c >> 14))+32));
+                    current = (c & 16383) << 1;
+                    break;
+                case 14:
+                    output.push(String.fromCharCode((current + (c >> 15))+32, (c & 32767)+32));
+                    status = 0;
+                    break;
+            }
+        }
+        output.push(String.fromCharCode(current + 32));
+        return output.join('');
+    },
+
+
+    decompressFromUTF16 : function (input) {
+        var output = [],
+            current,c,
+            status=0,
+            i = 0;
+
+        while (i < input.length) {
+            c = input.charCodeAt(i) - 32;
+
+            switch (status++) {
+                case 0:
+                    current = c << 1;
+                    break;
+                case 1:
+                    output.push(String.fromCharCode(current | (c >> 14)));
+                    current = (c&16383) << 2;
+                    break;
+                case 2:
+                    output.push(String.fromCharCode(current | (c >> 13)));
+                    current = (c&8191) << 3;
+                    break;
+                case 3:
+                    output.push(String.fromCharCode(current | (c >> 12)));
+                    current = (c&4095) << 4;
+                    break;
+                case 4:
+                    output.push(String.fromCharCode(current | (c >> 11)));
+                    current = (c&2047) << 5;
+                    break;
+                case 5:
+                    output.push(String.fromCharCode(current | (c >> 10)));
+                    current = (c&1023) << 6;
+                    break;
+                case 6:
+                    output.push(String.fromCharCode(current | (c >> 9)));
+                    current = (c&511) << 7;
+                    break;
+                case 7:
+                    output.push(String.fromCharCode(current | (c >> 8)));
+                    current = (c&255) << 8;
+                    break;
+                case 8:
+                    output.push(String.fromCharCode(current | (c >> 7)));
+                    current = (c&127) << 9;
+                    break;
+                case 9:
+                    output.push(String.fromCharCode(current | (c >> 6)));
+                    current = (c&63) << 10;
+                    break;
+                case 10:
+                    output.push(String.fromCharCode(current | (c >> 5)));
+                    current = (c&31) << 11;
+                    break;
+                case 11:
+                    output.push(String.fromCharCode(current | (c >> 4)));
+                    current = (c&15) << 12;
+                    break;
+                case 12:
+                    output.push(String.fromCharCode(current | (c >> 3)));
+                    current = (c&7) << 13;
+                    break;
+                case 13:
+                    output.push(String.fromCharCode(current | (c >> 2)));
+                    current = (c&3) << 14;
+                    break;
+                case 14:
+                    output.push(String.fromCharCode(current | (c >> 1)));
+                    current = (c&1) << 15;
+                    break;
+                case 15:
+                    output.push(String.fromCharCode(current | c));
+                    status=0;
+                    break;
+            }
+
+
+            i++;
+        }
+
+        return this.decompress(output.join(''));
+        //return output;
+
+    },
+
+
+    // private property
+    _keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=", // jshint ignore:line
+
+    decompress : function (input) {
+        var output = [];
+        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
+        var i = 1;
+        var odd = input.charCodeAt(0) >> 8;
+
+        while (i < input.length*2 && (i < input.length*2-1 || odd===0)) {
+
+            if (i%2===0) {
+                chr1 = input.charCodeAt(i/2) >> 8;
+                chr2 = input.charCodeAt(i/2) & 255;
+                if (i/2+1 < input.length) {
+                    chr3 = input.charCodeAt(i / 2 + 1) >> 8;
+                }
+                else {
+                    chr3 = NaN;
+                }
+            } else {
+                chr1 = input.charCodeAt((i-1)/2) & 255;
+                if ((i+1)/2 < input.length) {
+                    chr2 = input.charCodeAt((i+1)/2) >> 8;
+                    chr3 = input.charCodeAt((i+1)/2) & 255;
+                } else {
+                    chr2 = chr3 = NaN;
+                }
+            }
+            i+=3;
+
+            enc1 = chr1 >> 2;
+            enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
+            enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
+            enc4 = chr3 & 63;
+
+            if (isNaN(chr2) || (i==input.length*2+1 && odd)) {
+                enc3 = enc4 = 64;
+            } else if (isNaN(chr3) || (i==input.length*2 && odd)) {
+                enc4 = 64;
+            }
+
+            output.push(this._keyStr.charAt(enc1));
+            output.push(this._keyStr.charAt(enc2));
+            output.push(this._keyStr.charAt(enc3));
+            output.push(this._keyStr.charAt(enc4));
+        }
+
+        return output.join('');
+    },
+
+    compress : function (input) {
+        var output = [],
+            ol = 1,
+            output_,
+            chr1, chr2, chr3,
+            enc1, enc2, enc3, enc4,
+            i = 0, flush=false;
+
+        input = input.replace(/[^A-Za-z0-9\+\/\=]/g, ""); // jshint ignore:line
+
+        while (i < input.length) {
+
+            enc1 = this._keyStr.indexOf(input.charAt(i++));
+            enc2 = this._keyStr.indexOf(input.charAt(i++));
+            enc3 = this._keyStr.indexOf(input.charAt(i++));
+            enc4 = this._keyStr.indexOf(input.charAt(i++));
+
+            chr1 = (enc1 << 2) | (enc2 >> 4);
+            chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
+            chr3 = ((enc3 & 3) << 6) | enc4;
+
+            if (ol%2===0) {
+                output_ = chr1 << 8;
+                flush = true;
+
+                if (enc3 != 64) {
+                    output.push(String.fromCharCode(output_ | chr2));
+                    flush = false;
+                }
+                if (enc4 != 64) {
+                    output_ = chr3 << 8;
+                    flush = true;
+                }
+            } else {
+                output.push(String.fromCharCode(output_ | chr1));
+                flush = false;
+
+                if (enc3 != 64) {
+                    output_ = chr2 << 8;
+                    flush = true;
+                }
+                if (enc4 != 64) {
+                    output.push(String.fromCharCode(output_ | chr3));
+                    flush = false;
+                }
+            }
+            ol+=3;
+        }
+
+        if (flush) {
+            output.push(String.fromCharCode(output_));
+            output = output.join('');
+            output = String.fromCharCode(output.charCodeAt(0)|256) + output.substring(1);
+        } else {
+            output = output.join('');
+        }
+
+        return output;
+
+    }
+};
+
+/*jslint bitwise: false */
diff --git a/package.json b/package.json
index 0e59a8b8..315948da 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "esri-offline-maps",
-  "version": "3.3.2",
+  "version": "3.4.0",
   "description": "Lightweight set of libraries for working offline with map tiles and editing with ArcGIS feature services",
   "author": "Andy Gup <agup@esri.com> (http://blog.andygup.net)",
   "license": "Apache 2.0",
diff --git a/samples/package.json b/samples/package.json
index c9ffcdcc..02ba7340 100644
--- a/samples/package.json
+++ b/samples/package.json
@@ -9,7 +9,7 @@
   "appHomePage": "appcache-tiles.html",
   "optimizedApiURL": "../samples/jsolib",
   "arcGISBaseURL": "http://js.arcgis.com/3.14",
-  "version": "3.3.2",
+  "version": "3.4.0",
   "private": true,
   "description": "manifest generator project",
   "repository": {