HTML Escape / Unescape
Escape and unescape HTML entities including named, decimal, and hexadecimal references
Use HTML Escape / Unescape
Common HTML Entities:
Assumptions
Use HTML Escape/Unescape for encoding and auth debugging work when you need a local browser check and output you can review before using it in the next step.
Worked example
When To Use HTML Escape/Unescape
- Paste a real example into HTML Escape/Unescape that includes the edge case you need to check.
- Review whether the output matches inspect transformed strings before they move into requests or templates before using it in the next step.
Sample Input And Output Checks
- Start with a sample that includes the failure you are trying to reproduce, not only a clean placeholder.
- Review padding, escaping boundaries, token segments, and copied delimiters before trusting the output.
- Treat decoded or escaped output as readable input for the next step, not as automatically trusted data.
About This Tool
Free Online HTML Escape and Unescape Tool for Web Developers
The HTML Escape and Unescape Tool provides web developers, security engineers, content managers, and template developers with a fast, reliable way to convert special characters into their HTML entity equivalents and reverse the process when needed. HTML escaping is the practice of replacing characters that carry special meaning in HTML markup with safe entity references so that browsers render them as visible text rather than interpret them as code. This tool performs all processing entirely within your browser using client-side JavaScript, which means your data never leaves your machine.
HTML Entity Types: Named, Decimal, and Hexadecimal References
HTML entities come in three distinct formats. Named entities use a human-readable mnemonic such as & for the ampersand character, < for less-than, > for greater-than. Decimal numeric entities use the format < where the number represents the Unicode code point in base ten, while hexadecimal numeric entities use < with the code point in base sixteen.
Use Cases for HTML Escaping in Modern Web Development
HTML escaping plays a central role in virtually every web application that handles dynamic content. The most critical use case is XSS prevention. Beyond security, HTML escaping is essential for displaying code snippets, email template generation, and CMS content processing. For developers working with XML escape and unescape scenarios, the principles are similar but the entity sets differ.
HTML Escaping Libraries, Alternatives, and Best Practices
Production applications should use well-tested libraries for HTML escaping. For related encoding needs, explore our JavaScript string escape tool, SQL escape utility, CSV escape tool, and encode and decode hub for a complete suite of developer-focused text processing utilities.
Escape by Output Context, Not by Habit
One of the biggest mistakes in frontend security is assuming that all escaping problems are the same. HTML text nodes, HTML attributes, inline JavaScript, CSS values, and URLs each have different parsing rules, which means the correct escape strategy changes with the output context. This page is appropriate when you need to render literal text safely inside HTML or inspect entity conversion behavior, but it is not a universal sanitizer for every sink in the browser. If your string will be injected into a URL parameter or query string, use the URL Encoder/Decoder; if it is headed into JavaScript string literals, switch to the JavaScript Escape Tool.
Typical HTML Escape Workflows
Developers commonly rely on HTML escape and unescape during CMS debugging, documentation publishing, email template preparation, code snippet rendering, and safe previewing of user-generated content. It is also useful when you need to compare stored entity output against the original text after a template engine, markdown pipeline, or WYSIWYG editor has transformed the content. If you are working across markup formats, our XML Escape / Unescape tool helps you inspect similar issues in XML-based feeds, SOAP payloads, and configuration files.