Tool StudioTest regular expressions with live match highlighting
Highlighted matches
hello@example.comat index 14helloGroup 2: example.comsupport@test.orgat index 35supportGroup 2: test.orgWrite a regular expression, paste in test text, and see every match highlighted live — with capture groups broken out and clear errors for invalid patterns.
Enter your pattern
Type a regular expression.
Set flags
Toggle g, i, m, and s as needed.
Paste test text
See every match highlighted, with capture groups listed below.
What does the "g" flag do?
Global — without it, only the first match is found; with it, every match in the text is found and listed.
Why does my pattern show an error?
The pattern isn't valid JavaScript regex syntax — the exact error message from the engine is shown to help pinpoint the issue.
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