Unicode Converter

Convert text to and from Unicode escape sequences. Encoding outputs the ES2015 code-point form \u{XXXX} for every character whose code point is above U+007F, leaving ASCII characters unchanged. Decoding accepts both the brace form \u{1F600} and the classic four-digit form \u00e9 and renders the corresponding characters.

1. Pick the To Unicode or To Text mode tab.\n2. In To Unicode mode, enter plain text to receive escapes; in To Text mode, enter \u-style escapes to receive characters.\n3. Click Convert.\n4. Copy the result with the Copy button in the output card.

Encode iterates with codePointAt and emits \u{HEX} in uppercase for code points > 127, so emoji like 😀 become \u{1F600} and é becomes \u{E9}. ASCII letters, digits, and punctuation pass through untouched. Decode uses a single regex /\\u\{?([0-9a-fA-F]+)\}?/g that matches both braced and unbraced hex (case-insensitive) and calls String.fromCodePoint, so mixed sequences in one input are handled correctly.