Regex Tester & Tester — Free & Private (In-Browser)
Test regular expressions against your text and see every match with groups, in your browser. Set flags and iterate. No upload. Free.
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How to use Regex Tester
- 1Paste your input into the box, or upload a file.
- 2Adjust any options shown above the output.
- 3The Regex Tester runs locally in your browser as you type.
- 4Copy the result, or download it as a file.
Regex Tester FAQ
- What happens if my regex is invalid?
- You get a clear syntax error instead of a crash, and you can toggle flags like global, case-insensitive, and multiline. All local.