Test regular expressions and inspect matches instantly.
No. Matching runs locally with the JavaScript RegExp engine.
Without g, matchAll-style listing may not return every match. Use g to find all matches.
Support depends on your browser’s RegExp engine. Modern Chromium and Safari versions support many features.
Syntax errors (unclosed groups, bad quantifiers) throw. Fix the pattern using the error message.
1. "Hello" @ 0 2. "AiTools" @ 6 3. "123" @ 14
3 matches · Test regular expressions locally.