Practical guide
How to use HTML Entity Encoder
HTML Entity Encoder converts HTML-sensitive characters into character references and decodes named or numeric references back to text. It is intended for inspecting snippets, preparing literal examples, and understanding why text appears differently when interpreted as markup.
Step by step
- Paste ordinary text to encode or entity text to decode.
- Choose the matching action and compare the source with the result.
- Use a context-aware template or sanitizer in production rather than treating one escaping operation as universal protection.
Example
<strong>Tools & privacy</strong><strong>Tools & privacy</strong>How it works
Encoding replaces ampersand, angle brackets, quotation marks, and apostrophes with explicit references. Decoding delegates named and numeric references to the browser's HTML parser, then reads the resulting text rather than executing it as page markup.
Important limitations
- HTML text, attribute, URL, CSS, and JavaScript contexts require different defenses.
- Decoding untrusted content does not make it safe to insert with innerHTML or execute in a document.
Real workflows
When this tool is useful
Documentation examples
Encode angle brackets so a tutorial or CMS displays an HTML snippet literally instead of interpreting it as document structure.
Template debugging
Decode a short value to determine whether one or two escaping layers produced visible ampersands or entity names in rendered output.
Content migration
Review encoded headings or descriptions before moving them between systems that disagree about whether input is plain text or HTML.
Review the result
What to check before using the output
Identify the destination context before using the output. HTML element text, quoted attributes, unquoted attributes, URLs, CSS, and JavaScript strings do not share one universal escaping rule.
- Name the destination context.
- Encode before interpolation.
- Sanitize allowed markup separately.
- Test the final rendered page.
Choose the right method
When another tool is better
Use automatic contextual escaping from a maintained template framework and a proven sanitizer for user-authored markup. Manual entity conversion is appropriate for inspection, not as an application's complete XSS defense.
Privacy and browser behavior
Conversion happens locally. Decoded text can reveal hidden markup, links, or identifiers, but the tool never treats that result as executable HTML in its own interface.
Frequently asked questions
Is entity encoding the same as sanitizing HTML?
No. Encoding can make text literal in a specific HTML context; sanitizing selectively permits safe markup and requires a dedicated, maintained policy.
Will decoding run scripts?
The tool returns decoded characters as text and does not inject them into the page as executable markup.