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Regex Tester

Use this free online regex tester to check regular expressions against sample text, review matches, and copy the pattern or test input in seconds. It is a useful tool for developers, validation rules, search patterns, debugging, text parsing, and working with regular expressions directly in the browser.

Test textReady

Test regular expressions without opening a heavy debugger

This regex tester is meant for quick checks when you want to see whether a pattern matches what you expect. Paste some text, add the pattern and flags, then inspect the match list right away.

  • Quick match feedback for common regex debugging jobs
  • Works well for copy cleanup, validation and parsing tasks
  • Useful companion to JSON, URL and text utilities

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FAQ

Can I use regex flags here?

Yes. Enter flags such as g, i or m in the flags field.

Does the tool show all matches?

Yes. When the pattern is valid, the page lists the matches it finds.

Test a pattern before you put it into code

Regular expressions are powerful but easy to get wrong. A live tester helps you see what matches, what does not and whether the pattern is more aggressive than you intended.

Useful for validation, cleanup and extraction

Regex is often used for search, replacements, validation and parsing. A browser-based tester is a quick place to iterate before you move the pattern into JavaScript, PHP or another language.

Example

Example: test a pattern for email-like strings, IDs or specific URL paths before using it in validation or cleanup logic.