Free Unicode Encoder & Decoder Online
Convert text to Unicode escape sequences and decode them back. Real-time conversion in your browser.
Key Features
Everything you need to work with Unicode escape sequences
Convert any non-ASCII character to its \uXXXX escape form used in JavaScript, Java, JSON and many other languages.
Encode text to Unicode escapes or decode escape sequences back to readable characters with a tab switch.
All processing runs locally in your browser. Your data never leaves your device.
About the Unicode Encoder & Decoder
Unicode escape sequences represent characters using their code point in hexadecimal notation, for example \u00E9 for the letter e with an accent. Developers use these in source code, configuration files and data formats where non-ASCII characters need to be safely embedded. This free tool converts text to escape sequences and back entirely in your browser.
Frequently Asked Questions
Is this tool completely free?
Yes. The tool is 100% free to use with no registration, no subscription and no usage limits.
You can use it as many times as you need for personal or commercial projects without any cost.
We believe developer and productivity tools should be accessible to everyone without paywalls.
When would I use Unicode escape sequences?
They are useful when you need to include special characters in source code or configuration files that only support ASCII.
JavaScript, Java, Python and JSON all support \uXXXX syntax for embedding Unicode characters safely.
Escaping also helps when transmitting text through systems that may corrupt non-ASCII bytes.
What does the encoder do to ASCII characters?
ASCII characters with code points 0 to 127 are left unchanged because they do not require escaping.
Only characters above code point 127 are converted to \uXXXX form in the output.
This keeps the output readable while ensuring all non-ASCII characters are safely escaped.
Does this tool work offline?
Once the page has loaded, all conversion logic runs entirely in your browser using JavaScript.
No network requests are made during conversion so the tool continues to work even without an internet connection.
You can bookmark the page and use it any time for quick access.