What this tool does
The HTML entities encoder helps safely place text fragments into HTML and quickly decode encoded characters.
How to use
- Paste an HTML fragment or a string with entities.
- Choose encoding or decoding.
- Copy the result.
Why HTML escaping matters
HTML entities are useful when text should remain text instead of becoming markup. Characters such as <, >, &, quotes, and apostrophes can change the structure of HTML, so they are often replaced with safe forms such as <, >, and &.
This helps with documentation, comments, email templates, code previews, and manual interface snippets. If user text is inserted without escaping, the browser may interpret part of it as a tag or attribute.
Encoding, decoding, and context
The encoder turns key characters into HTML entities, while the decoder turns entities back into readable text. Quotes are especially important inside attributes; ampersands and angle brackets are usually the main concern inside page text.
The tool helps inspect and prepare strings, but it is not a full HTML sanitizer. It does not parse the DOM, remove dangerous URLs, or replace XSS protection in an application.
Practical limits
HTML supports named entities, decimal numeric entities, and hexadecimal numeric entities. Browsers understand many variants, but team workflows are easier when you keep one predictable style and test the result in the real template.
All conversions run locally. Use this tool for short fragments and diagnostics; for large documents or production user content, rely on the escaping and sanitizing libraries recommended by your framework.
In React, Vue, Astro, or server-side templates, the framework’s built-in escaping is usually the safer default. This online converter is best for checking a string and learning the format, not for replacing application-level user-input handling.