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Regex Tester tool

Regex Tester

Test regular expressions against sample text with live matches.

Input stays in browserRuns locallyNo signupFree to use
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Matches

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How to use Regex Tester

  1. 1Enter a browser regular expression and flags.
  2. 2Enter test text and optional replacement text.
  3. 3Review matches and replacement output.

Processing and current limits

This supported operation runs in your browser after you select an input. Free use allows 25 MB files and shares 20 completed operations per day across tools. Pro removes those product limits, but browser memory and device performance can still limit large files.

Review security and data handling and current limits before processing a sensitive or important original.

Formats and limitations

Accepts text and browser supported regular expression syntax.

Match listing requires the global flag. Syntax and advanced features depend on the current browser.

Common uses

  • Test a search pattern.
  • Preview a text replacement.
  • Inspect match positions.

Frequently asked questions

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