Encoding tool

HTML Entity Encoder/Decoder

Escape and decode HTML entities safely for documentation snippets, copied API responses and template debugging.

Tool Workspace

Processing is intended to run locally in your browser whenever possible. Avoid pasting production secrets, access tokens, private keys or sensitive business data into any online tool unless you fully understand the risk.

Ready. Processing runs in your browser.

Core Features

  • Escape characters that have special meaning in HTML.
  • Decode entities into readable text.
  • Help prepare code snippets for documentation.
  • Explain display escaping versus security controls.

How to Use

  1. Paste text that contains HTML-sensitive characters.
  2. Encode when you need to display markup as text.
  3. Decode when reviewing copied entity strings.
  4. Review the output before using it in documentation or templates.

Common Errors

  • Displaying raw HTML when the intent is text.
  • Double-escaping ampersands.
  • Assuming entity encoding alone prevents all XSS risks.
  • Mixing HTML escaping with URL encoding.

Real Developer Use Cases

  • Publishing code examples in documentation.
  • Debugging escaped CMS content.
  • Checking text output before inserting into an HTML template.

Technical Explanation

HTML entities let reserved characters such as angle brackets and ampersands appear as text instead of markup. This is useful for documentation, logs and template output. Entity encoding is related to safe display, but it is not a complete security model by itself. Context still matters for attributes, URLs, scripts and rich HTML.

FAQ

Is my input uploaded to your server?

Tool input is processed in the browser for these utilities unless a page explicitly states otherwise.

Can I use this with production secrets?

Do not paste production passwords, private keys, access tokens or sensitive business data into any online tool unless you fully understand the risk.

Why does this page include explanations below the tool?

Developer Data Tools is designed to help users understand the data problem, not just transform input and output.