Type a pattern and flags to instantly highlight the matching parts of your string. From checking capture groups to previewing replacements, all on one screen like an editor.
AG Regex Tester — Real-Time Match Highlighting · Capture Groups · Replace
pattern.re
//gi
Examples
test.txt
output
No matches
Replacement Result
The replacement result will appear here.
All processing runs entirely in your browser's RegExp engine; patterns and strings are never sent to or stored on a server.
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