TT
Text Toolkit

HTML Entity Encoder & Decoder

HTML encoding converts characters that have special meaning in HTML (like <, >, &, ") into their corresponding HTML entities (like &lt;, &gt;, &amp;, &quot;). This is critical for displaying code snippets on a webpage without the browser interpreting them as actual HTML tags, and is a fundamental first line of defense against Cross-Site Scripting (XSS) attacks.

Input

0 characters

Encoded Output

0 characters

HTML Entities Encode

HTML entity encode/decode for web content

Who Uses This Tool

  • • Web Developers displaying code blocks
  • • Content Management System (CMS) users
  • • Security Researchers testing XSS vulnerabilities
  • • Technical Writers documenting HTML syntax
  • • Bloggers pasting code samples

Key Features

  • ✓ Escapes reserved HTML characters
  • ✓ Unescapes entities back to text
  • ✓ Prevents browser rendering conflicts
  • ✓ Essential for web security (XSS prevention)
  • ✓ Client-side secure processing
  • ✓ Preserves original formatting

Frequently Asked Questions

What happens if I don't encode HTML?

If you write '5 < 10' in HTML without encoding, the browser might think '< 10' is the start of a tag and hide it/break the page layout. Encoding it to '5 &lt; 10' ensures it displays correctly.

How does this prevent XSS?

Cross-Site Scripting (XSS) happens when malicious scripts are injected into a page. By encoding characters like '<script>', they become harmless text '&lt;script&gt;' that strictly displays on screen but never executes.

Does this encode everything?

It focuses on the 'reserved' characters that break HTML structure: <, >, &, ", and '. It does not obscure normal text.

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