HTML Encoder/Decoder for JavaScript
Free online html encoder/decoder with JavaScript code examples
Working with html encoder/decoder in JavaScript? Our free online html encoder/decoder helps JavaScript developers format, validate, and process data instantly. Below you will find JavaScript code examples using he / DOM API so you can achieve the same result programmatically in your own projects.
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Open HTML Encoder/DecoderJavaScript Code Example
// Using the 'he' library (Node.js)
const he = require('he');
const encoded = he.encode('<script>alert("XSS")</script>');
console.log(encoded); // <script>alert("XSS")</script>
const decoded = he.decode(encoded);
console.log(decoded);
// Browser alternative:
// const div = document.createElement('div');
// div.textContent = text; encoded = div.innerHTML;Quick Setup
Library: he / DOM API
npm install heJavaScript Tips & Best Practices
- In browsers, use textContent/innerHTML for encoding
- The 'he' library handles all HTML entities correctly
- Always encode user input to prevent XSS attacks