Developer
Regex Tester
Test JavaScript regular expressions with matches, indices and groups.
Runs in your browser using the native JavaScript RegExp engine. Free.
About this tool
Free regex tester. Try a JavaScript regular expression against sample text and see every match with its index and capture groups.
Frequently asked questions
Which flavour of regex is used?
The native JavaScript RegExp engine, so results match exactly what your browser or Node code will do.
What do the flags mean?
g finds all matches, i ignores case, m makes ^ and $ match per line, s lets . match newlines and u enables Unicode mode.
Does it support named groups?
Yes. Named capture groups appear in the results alongside numbered groups.
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