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HTML Entities Encoder / Decoder

Instantly encode special characters to HTML entities and decode entities back to readable text with our free browser-based tool. Essential for web developers editing HTML/XML source code, content creators preventing XSS vulnerabilities in code examples, technical writers documenting markup syntax, and anyone needing to display special characters like <, >, &, and quotes safely in HTML documents. The encoder converts characters to their named entity equivalents (&lt;, &gt;, &copy;, &euro;) or numeric references (&#39; for apostrophes). The decoder reverses the process, transforming entities back into their original characters. No server uploads required, all processing happens in your browser for maximum privacy and speed. Perfect for Stack Overflow posts, GitHub documentation, blog code snippets, and any situation where you need to show HTML markup as text rather than rendered content. Method details for HTML Entities Encoder / Decoder: Conversion runs through explicit encoding and decoder logic, preserves unit or timestamp precision, and validates structured mappings such as json or csv where relevant.

Common HTML Entities

< → &lt;
> → &gt;
& → &amp;
" → &quot;
' → &apos; or &#39;
© → &copy;
® → &reg;
™ → &trade;
€ → &euro;
£ → &pound;
¥ → &yen;
Space → &nbsp;

How to Use This Tool

  1. Choose Encode or Decode: Click the 'Encode' button to convert plain text to HTML entities, or 'Decode' to convert entities back to text.
  2. Paste your text: Enter or paste your content in the left textarea. The tool converts automatically as you type.
  3. Copy the result: The converted output appears in the right textarea. Click 'Copy Result' to copy to clipboard.
  4. Use Swap for reverse conversion: Click the ⇄ Swap button to move the result to input and switch modes instantly.
  5. Reference common entities: Check the table below for frequently used HTML entity codes and their characters.

Why Use This Tool?

This HTML entities encoder uses precise character mapping based on the HTML5 specification to ensure compatibility across all browsers and XML parsers. The encoder handles critical characters that would otherwise break HTML parsing: < and > (tag delimiters), & (entity prefix), and quotes (" and ') that could break attributes. It also encodes common symbols like copyright (©), trademark (™), and currency signs (€, £). The decoder uses the browser's native DOMParser API to accurately convert all named and numeric entities.

Client-side processing means your sensitive code or content never leaves your browser, crucial for confidential documentation or proprietary markup. This tool is essential for developers posting code on forums (prevents markup interpretation), technical writers creating tutorials (shows actual HTML syntax), and security researchers demonstrating XSS payloads safely. The bidirectional conversion and instant preview make it faster than manual find-and-replace, especially when working with large code blocks containing multiple special characters.