Regex tester
Test a regular expression against your text and see every match, group and replacement.
Runs in this browser. Nothing you give it is uploaded.
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02About this tool
How to use it.
- Type a pattern and any flags.
- Paste the text to test.
- Read each match, its position and its groups. Add a replacement to see the result.
Questions
Which regular expression flavour is it?
JavaScript's, the one your browser uses. Other languages differ in small ways, such as lookbehind and named groups.
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