Regex Tester
Test regular expressions live with matches and replace preview.
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Matches
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Capture groups
Without the g flag only the first match is tested. Empty patterns match at every position, which is normal regex behavior.
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Über
Enter a pattern (with optional g, i, m, u flags) and test text to see every match with its position and captured groups, plus a live preview of string.replace().
A reminder for daily use: regex cannot fully parse nested structures like HTML — use a parser for those, regex for the matches it was designed for.
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