diff --git a/.github/workflows/docker-publish.yml b/.github/workflows/docker-publish.yml
index c98fcc7..6175bba 100644
--- a/.github/workflows/docker-publish.yml
+++ b/.github/workflows/docker-publish.yml
@@ -36,6 +36,9 @@ jobs:
           - dockerfile: ./bin/pdf-page-extractor/Dockerfile
             context: ./bin/pdf-page-extractor
             image: ghcr.io/kduma-oss/cli-pdf-scan-splitter/pdf-page-extractor
+          - dockerfile: ./bin/pdf-page-joiner/Dockerfile
+            context: ./bin/pdf-page-joiner
+            image: ghcr.io/kduma-oss/cli-pdf-scan-splitter/pdf-page-joiner
 
     runs-on: ubuntu-latest
     permissions:
diff --git a/app/Actions/PdfPagesJoinerAction.php b/app/Actions/PdfPagesJoinerAction.php
new file mode 100644
index 0000000..a628e86
--- /dev/null
+++ b/app/Actions/PdfPagesJoinerAction.php
@@ -0,0 +1,62 @@
+<?php
+
+namespace App\Actions;
+
+use App\Actions\Tools\RunDockerContainerAction;
+use App\Actions\Tools\Exceptions\PdfPageContentsExtractorException;
+use App\Actions\Tools\TemporaryDirectoryCreatorAction;
+use Illuminate\Support\Collection;
+use Illuminate\Support\Str;
+use SplFileInfo;
+
+class PdfPagesJoinerAction
+{
+    public function __construct(
+        protected RunDockerContainerAction $runDockerContainerAction,
+        protected TemporaryDirectoryCreatorAction $tempDirMaker
+    ) {}
+
+    public function execute(array|Collection $input_files, string|SplFileInfo $output_file): void
+    {
+        if(is_string($output_file))
+            $output_file = new SplFileInfo($output_file);
+
+        if(is_array($input_files))
+            $input_files = collect($input_files);
+
+        $input_files = $input_files
+            ->map(function($input_file) {
+                if(is_string($input_file))
+                    return new SplFileInfo($input_file);
+
+                return $input_file;
+            })
+            ->values()
+            ->mapWithKeys(fn(SplFileInfo $file, $index) => ['input-'.str_pad($index, 5, '0', STR_PAD_LEFT).'.pdf' => $file]);
+
+        $temporaryDirectory = $this->tempDirMaker->create();
+
+        $input_files->each(function(SplFileInfo $input_file, $name) use ($temporaryDirectory) {
+            copy($input_file->getPathname(), $temporaryDirectory->path($name));
+        });
+
+        $action = $this
+            ->runDockerContainerAction
+            ->withTemporaryDirectory($temporaryDirectory);
+
+        $action->execute(dockerImageName: 'ghcr.io/kduma-oss/cli-pdf-scan-splitter/pdf-page-joiner',output: $output, return: $return);
+
+        if (0 != $return) {
+            $temporaryDirectory->delete();
+            throw new PdfPageContentsExtractorException(
+                command: $action->getCommand(dockerImageName: 'ghcr.io/kduma-oss/cli-pdf-scan-splitter/pdf-page-joiner'),
+                code: $return,
+                output: $output,
+            );
+        }
+
+        copy($temporaryDirectory->path('output.pdf'), $output_file->getPathname());
+
+        $temporaryDirectory->delete();
+    }
+}
diff --git a/app/Actions/ScanBarcodes.php b/app/Actions/ScanBarcodes.php
index 5880ab6..6e65173 100644
--- a/app/Actions/ScanBarcodes.php
+++ b/app/Actions/ScanBarcodes.php
@@ -47,7 +47,7 @@ public function execute(string|SplFileInfo $input_file): Collection
         $barcodes = collect(explode("\n", $barcodes))
             ->map(fn($barcode) => trim($barcode))
             ->filter(fn($barcode) => !empty($barcode))
-            ->map(fn($barcode) => explode(':', $barcode))
+            ->map(fn($barcode) => explode(':', $barcode, 2))
             ->map(fn($barcode) => [
                 'type' => $barcode[0],
                 'value' => $barcode[1],
diff --git a/app/Commands/BuildDockerImagesCommand.php b/app/Commands/BuildDockerImagesCommand.php
index 6bdd841..3313a38 100644
--- a/app/Commands/BuildDockerImagesCommand.php
+++ b/app/Commands/BuildDockerImagesCommand.php
@@ -47,6 +47,7 @@ public function handle(BuildDockerImageAction $builder, RunDockerContainerAction
 
         collect([
             'ghcr.io/kduma-oss/cli-pdf-scan-splitter/pdf-page-extractor' => base_path('bin/pdf-page-extractor/'),
+            'ghcr.io/kduma-oss/cli-pdf-scan-splitter/pdf-page-joiner' => base_path('bin/pdf-page-joiner/'),
             'ghcr.io/kduma-oss/cli-pdf-scan-splitter/barcode-scanner' => base_path('bin/barcode-scanner/'),
         ])->each(function ($path, $tag) use ($builder, $runner) {
             $this->info($builder->getCommand($tag, $path));
diff --git a/app/Commands/ProcessPdfFilesCommand.php b/app/Commands/ProcessPdfFilesCommand.php
index 284213d..1d7fe00 100644
--- a/app/Commands/ProcessPdfFilesCommand.php
+++ b/app/Commands/ProcessPdfFilesCommand.php
@@ -2,10 +2,12 @@
 
 namespace App\Commands;
 
+use App\Actions\PdfPagesJoinerAction;
 use App\Actions\PdfPagesSplitterAction;
 use App\Actions\ScanBarcodes;
 use App\Actions\Tools\TemporaryDirectoryCreatorAction;
 use Illuminate\Console\Scheduling\Schedule;
+use Illuminate\Support\Collection;
 use Illuminate\Support\Str;
 use LaravelZero\Framework\Commands\Command;
 use Spatie\TemporaryDirectory\TemporaryDirectory;
@@ -34,7 +36,7 @@ class ProcessPdfFilesCommand extends Command
      *
      * @return mixed
      */
-    public function handle(PdfPagesSplitterAction $extractor, ScanBarcodes $scanner, TemporaryDirectoryCreatorAction $tempDirMaker)
+    public function handle(PdfPagesSplitterAction $extractor, ScanBarcodes $scanner, TemporaryDirectoryCreatorAction $tempDirMaker, PdfPagesJoinerAction $joiner)
     {
         $inputs = collect($this->argument('pdf'))
             ->map(fn($path) => realpath($path))
@@ -66,7 +68,7 @@ public function handle(PdfPagesSplitterAction $extractor, ScanBarcodes $scanner,
                 output_dir: $temporaryDirectory->path(),
             );
 
-            $file_hash = sha1($file->getRealPath());
+            $file_hash = sha1($file->getRealPath()).'_'.Str::random(8);
             foreach ($pages as $page) {
                 $outputs[] = $output = $temporaryInputsDirectory->path($file_hash.'-'.basename($page));
                 rename($page, $output);
@@ -76,15 +78,16 @@ public function handle(PdfPagesSplitterAction $extractor, ScanBarcodes $scanner,
         });
 
         $final = [];
+        $tagged = collect([]);
         $outputs = collect($outputs)->map(fn($path) => new SplFileInfo($path));
         $this->newLine(2);
         $this->info("Scanning pages for barcodes");
-        $this->withProgressBar($outputs, function (SplFileInfo $page) use ($temporaryOutputDirectory, $scanner, &$final) {
-            $bc = $scanner->execute(
+        $this->withProgressBar($outputs, function (SplFileInfo $page) use ($temporaryOutputDirectory, $scanner, &$final, &$tagged) {
+            $scanned = $scanner->execute(
                 input_file: $page
             );
 
-            $bc = $bc->filter(fn($barcode) => $barcode['type'] == 'CODE-128');
+            $bc = $scanned->filter(fn($barcode) => $barcode['type'] == 'CODE-128');
             if($bc->count() > 0) {
                 $bc = $bc->first();
                 $bc = $bc['value'];
@@ -92,10 +95,105 @@ public function handle(PdfPagesSplitterAction $extractor, ScanBarcodes $scanner,
                 $bc = 'UNKNOWN';
             }
 
-            $final[] = $output = $this->getOutputPath($temporaryOutputDirectory, $bc);
+            $page_tags = $scanned
+                ->filter(fn($barcode) => $barcode['type'] == 'QR-Code')
+                ->map(function ($barcode) {
+                    if(false === preg_match('/^([0-9A-Za-z]+):(\\d+)(:(\\d+))?$/um', $barcode['value'])) {
+                        return null;
+                    }
+                    [$id, $page, $count] = explode(':', $barcode['value'].':::');
+
+                    $barcode['tag'] = [
+                        'id' => $id != "" ? $id : null,
+                        'page' => $page != "" ? $page : null,
+                        'count' => $count != "" ? $count : null,
+                    ];
+
+                    return $barcode;
+                })
+                ->filter()
+                ->map(function ($barcode) use ($bc) {
+                    if(is_null($barcode['tag']['id'])) {
+                        $barcode['tag']['id'] = $bc;
+                    }
+
+                    return $barcode;
+                });
+
+            if($page_tags->count() > 0) {
+                $t = $page_tags->first();
+                $id = $t['tag']['id'];
+                $page_no = $t['tag']['page'];
+
+                if(!isset($tagged[$id])) {
+                    $tagged[$id] = collect();
+                }
+
+                if(!isset($tagged[$id][$page_no])) {
+                    $tagged[$id][$page_no] = collect();
+                }
+
+                $output = $this->getOutputPath($temporaryOutputDirectory, 'TG_'.$bc);
+
+                $tagged[$id][$page_no][] = [
+                    'file' => $output,
+                    'tag' => $t['tag'],
+                    'barcode' => $bc,
+                ];
+
+
+            } else {
+                $final[] = $output = $this->getOutputPath($temporaryOutputDirectory, $bc);
+            }
             rename($page, $output);
         });
 
+        if($tagged->count()) {
+            $this->newLine(2);
+            $errors = [];
+            $this->info("Processing multi-page documents");
+            $this->withProgressBar($tagged, function (Collection $tag_pages) use ($joiner, $temporaryOutputDirectory, &$errors, &$final) {
+                $tag_pages = $tag_pages->sortKeys();
+                $tag_name = $tag_pages->first()->first()['tag']['id'];
+
+                if($tag_pages->keys()->max() != $tag_pages->keys()->count()) {
+                    $errors[] = $tag_name.' has missing pages - last page is '.$tag_pages->keys()->max(). ' but there are '.$tag_pages->keys()->count().' pages!';
+                }
+
+                $tag_pages = $tag_pages->map(function (Collection $tag_page, $page_number) use ($tag_name, &$errors, &$final) {
+                    if($tag_page->count() > 1) {
+                        $errors[] = $tag_name.':'.$page_number.' has been scanned multiple times!';
+                    }
+
+                    $used = $tag_page->pop();
+
+                    foreach ($tag_page as $p) {
+                        $file = $p['file'];
+                        $new_file = pathinfo($file, PATHINFO_DIRNAME).DIRECTORY_SEPARATOR.'IGNORED_'.pathinfo($file, PATHINFO_FILENAME).'_'.$p['tag']['page'].'.'.pathinfo($file, PATHINFO_EXTENSION);
+                        $errors[] = $tag_name.':'.$page_number.' - ignored file placed at '.basename($new_file);
+
+                        $final[] = $new_file;
+                        rename($file, $new_file);
+                    }
+
+                    return $used;
+                });
+
+                $barcode = $tag_pages->first()['barcode'];
+
+
+                $joiner->execute(
+                    input_files: $tag_pages->pluck('file'),
+                    output_file: $output = $this->getOutputPath($temporaryOutputDirectory, $barcode),
+                );
+                $final[] = $output;
+            });
+            $this->newLine(2);
+            foreach ($errors as $error) {
+                $this->error($error);
+            }
+        }
+
         $this->newLine(2);
         $this->info("Moving files to output directory");
         $final = collect($final)->map(fn($path) => new SplFileInfo($path));
diff --git a/bin/pdf-page-joiner/Dockerfile b/bin/pdf-page-joiner/Dockerfile
new file mode 100644
index 0000000..94d6c64
--- /dev/null
+++ b/bin/pdf-page-joiner/Dockerfile
@@ -0,0 +1,14 @@
+FROM ubuntu:22.04
+#FROM ubuntu:16.04
+
+WORKDIR /src
+
+RUN apt-get update && apt-get install -y \
+  poppler-utils \
+  && rm -rf /var/lib/apt/lists/*
+
+COPY run.sh run.sh
+
+WORKDIR /data
+
+ENTRYPOINT ["/src/run.sh"]
diff --git a/bin/pdf-page-joiner/run.sh b/bin/pdf-page-joiner/run.sh
new file mode 100755
index 0000000..8aafeca
--- /dev/null
+++ b/bin/pdf-page-joiner/run.sh
@@ -0,0 +1,2 @@
+#!/bin/bash
+/usr/bin/pdfunite /data/input-*.pdf '/data/output.pdf' || exit 1
diff --git a/test_data/test-randomized.pdf b/test_data/test-randomized.pdf
new file mode 100644
index 0000000..588ac05
Binary files /dev/null and b/test_data/test-randomized.pdf differ
diff --git a/test_data/test.pages b/test_data/test.pages
new file mode 100755
index 0000000..8ea070d
Binary files /dev/null and b/test_data/test.pages differ
diff --git a/test_data/test.pdf b/test_data/test.pdf
new file mode 100644
index 0000000..6b6bbf7
Binary files /dev/null and b/test_data/test.pdf differ