NT Nano TextUtils
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● Encoding & Decoding

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.

Your text never leaves your browser. Everything is processed locally.

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Input

0 characters

Encoded Output

0 characters

HTML Entities Encode

HTML entity encode/decode for web content
How this tool works Documentation & SEO

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.

Convert special characters to HTML entities instantly. Prevent XSS and display code snippets safely by escaping <, >, &, and quotes.

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 FAQ
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.