Is my text sent to a server?

No. Escaping and unescaping run entirely in your browser with plain JavaScript string processing. Nothing is uploaded or stored.

Which escape forms does the tool produce?

Printable ASCII stays as-is. Code points up to 0xFF become \xNN, up to 0xFFFF become \uNNNN, and anything above (emoji, rare CJK) becomes the ES2015 form \u{NNNNN}.

Can it decode all three forms at once?

Yes. Unescape mode resolves \u{...}, \uNNNN, and \xNN sequences in a single pass, so mixed input decodes correctly.

JavaScript Hex String Escape

Overview

JavaScript string literals can represent any character with hex escapes: \xNN for single bytes, \uNNNN for the Basic Multilingual Plane, and \u{NNNNN} for code points beyond it. This tool converts text to those sequences and back — useful for embedding non-ASCII text in source files, inspecting obfuscated strings, or debugging encoding issues.

How to use

Pick Escape to convert plain text, or Unescape to decode escape sequences.
Type or paste into the Text (or Escaped) field. The Result updates instantly.
In Unescape mode, an Invalid escape sequence error appears if the input cannot be parsed.

Examples

café → caf\xe9
日本語 → \u65e5\u672c\u8a9e
\u{1f310} → 🌐

Notes

Printable ASCII characters (except the backslash itself) pass through unchanged, so output stays readable. This is escaping, not encryption — anyone can reverse it. When decoding untrusted strings, remember the result is still plain text; nothing is executed.