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Regex Tester
Run bounded JavaScript regular expressions in a worker.
Limit2,048-character pattern · 100,000-character input · 1 secondRuns in this browser
0 / 100,000
Native JavaScript regex syntax only. Execution runs in a disposable worker and is terminated after 1 second or 200 matches.
Enter a pattern and test text. Invalid flags and patterns are reported without changing the input.