HTML Entity Encoder

What is HTML Entity Encoding?

HTML entity encoding converts special characters into their HTML entity equivalents so they display correctly in web pages without being interpreted as markup. Characters like <, >, &, and " have special meaning in HTML — encoding them prevents rendering issues and cross-site scripting (XSS) vulnerabilities. For example, <script> becomes <script>, ensuring the browser displays the text rather than executing it as code.

How to Use This Tool

1. To encode: Paste raw text containing HTML characters in the left panel and click "Encode →". Special characters are converted to their entity form.
2. To decode: Paste HTML-encoded text in the right panel and click "← Decode" to restore the original characters.
3. Copy the output and safely embed it in your HTML source, CMS content, or API responses.

Common Use Cases for Developers

• XSS prevention: Encode user-generated content before rendering it in HTML to prevent script injection attacks.
• Code documentation: Display HTML code snippets in blog posts or documentation without the browser parsing them as actual elements.
• Email templates: Encode special characters in HTML emails to ensure consistent rendering across mail clients.
• CMS content: Safely store and display content containing angle brackets, ampersands, or quote characters.
• RSS/XML feeds: Encode HTML content embedded within XML documents to maintain valid markup structure.

Tips & FAQ

• Which characters need encoding? At minimum: < → <, > → >, & → &, " → ", and ' → '. This tool handles all of them automatically.
• Double encoding: Be careful not to encode already-encoded text, or you'll get < instead of <. Decode first if unsure about the input state.
• Server-side best practice: Always encode on output (when rendering HTML), not on input (when storing data). This preserves the original data and allows correct encoding for different output contexts.