Unicode Converter

A Unicode escape sequence is a way of writing a character inside source code or markup using only plain ASCII, by spelling out its Unicode code point instead of the character itself; for example, the letter "A" (code point 65, or 0x41 in hex) can be written as \u0041 in JavaScript or A in HTML, and both represent the exact same character.

Characters outside the first 65,536 Unicode code points, including most emoji, cannot fit in a single 16-bit \uXXXX escape, so JavaScript and Java represent them as a "surrogate pair": two consecutive \uXXXX escapes that only make sense together. This tool automatically combines a valid high-low surrogate pair back into one character when decoding, and automatically splits a character into a surrogate pair when encoding to the \uXXXX format.

Yes, the "Unicode to Text" tab scans your input for recognized escape patterns (\uXXXX, \u{XXXXXX}, &#xXXXX;, &#DDDD;, and U+XXXX) and replaces only those, leaving any surrounding plain text exactly as it was; this is useful for cleaning up text copied from a source file or web page where only some characters were escaped.

\uXXXX is the classic JavaScript/Java/JSON escape and always uses exactly 4 hex digits, requiring a surrogate pair for characters above U+FFFF; \u{XXXXXX} is the newer ES6 code point escape that can represent any code point directly without a surrogate pair; &#xXXXX; and &#DDDD; are HTML numeric character references in hex and decimal that browsers render directly in markup.

No, every conversion happens with plain JavaScript directly in your browser; your text is never uploaded to a server.