RegEx Tester
Test JavaScript regular expressions locally, inspect matches and capture groups, and preview replacements.
No upload
Pattern and text
Pattern and test data stay local in the browser. Execution runs in a worker.
Flags
The tester uses native JavaScript/ECMAScript RegExp semantics. Other engines can behave differently.
A successful test does not prove a regular expression is fast for large or hostile inputs.
Matches
Enter a pattern and test text.
Test suite
Match/No-Match-Fälle lokal ausführen.