HTML Entity Encode / Decode

Escape text for HTML (& < > quotes) or every non-ASCII character as named or numeric entities, and decode them back. Runs in your browser.

In HTML, < starts a tag and & starts a character reference, so text that contains them has to be written as &lt; and &amp; or the browser will read it as markup. That's the difference between showing a code sample and running someone's injected script. Encoding only the special characters is all a UTF-8 page needs; encoding every non-ASCII character too (é as &eacute; or &#233;) is for email templates, old CMSs and systems that mangle UTF-8.