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Regex Tester

Test JavaScript regular expressions against sample text with match details.

  • Runs in your browser
  • No account
  • Clear output
Contact support@clearkit.tools or sales@example.com before 2026-05-03.
Paste or edit input, then run the tool.
Contact support@clearkit.tools or sales@example.com before 2026-05-03.

How to use

  1. Paste your sample text in the input area.
  2. Enter a regex pattern in the pattern field.
  3. Click Run to see all matches with positions.

Examples

  • Test an email validation pattern against sample addresses.
  • Debug a URL matching regex with live feedback.

FAQ

Is Regex Tester free to use?

Yes. The page is designed as a free, lightweight utility with non-intrusive ads instead of accounts or paywalls.

Does this tool upload my files or text?

No. The core work runs in your browser, so files and text do not need to leave your device. See the privacy page for broader site details.

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