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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>JSON Formatter and Validator</title>
<style>
body {
font-family: Arial, sans-serif;
background-color: #f5f5f5;
padding: 20px;
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
margin: 0;
}
.container {
background-color: #fff;
padding: 20px;
border-radius: 8px;
box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
width: 80%;
max-width: 900px;
text-align: center;
}
h1 {
font-size: 24px;
margin-bottom: 20px;
}
textarea {
width: 100%;
height: 250px;
padding: 10px;
font-size: 14px;
border: 1px solid #ccc;
border-radius: 5px;
margin-bottom: 20px;
resize: vertical;
background-color: #f9f9f9;
}
button {
padding: 10px 20px;
background-color: #007BFF;
color: #fff;
border: none;
border-radius: 5px;
cursor: pointer;
font-size: 16px;
transition: background-color 0.3s;
}
button:hover {
background-color: #0056b3;
}
.output {
font-size: 14px;
text-align: left;
margin-top: 20px;
background-color: #f0f0f0;
padding: 15px;
border-radius: 5px;
word-wrap: break-word;
white-space: pre-wrap;
max-height: 300px;
overflow-y: auto;
margin-bottom: 10px;
}
.error {
color: red;
font-size: 14px;
margin-top: 10px;
}
</style>
</head>
<body>
<div class="container">
<h1>JSON Formatter and Validator</h1>
<textarea id="jsonInput" placeholder="Paste your JSON here..."></textarea>
<button onclick="processJSON()">Format & Validate</button>
<div id="jsonOutput" class="output"></div>
<div id="jsonError" class="error"></div>
</div>
<script>
// Function to format and validate JSON input
function processJSON() {
const input = document.getElementById('jsonInput').value;
const output = document.getElementById('jsonOutput');
const error = document.getElementById('jsonError');
try {
// Validate and parse the input JSON
const parsedJson = JSON.parse(input);
// Format the parsed JSON with indentation
const formattedJson = JSON.stringify(parsedJson, null, 2);
// Display formatted JSON
output.textContent = formattedJson;
error.textContent = ''; // Clear any previous error message
} catch (e) {
// If there's an error parsing JSON, show the error message
error.textContent = `Invalid JSON: ${e.message}`;
output.textContent = ''; // Clear output if invalid
}
}
</script>
</body>
</html>