ConvertUtility

Regex Tester Online

Free online regex tester. Test patterns, tweak flags, and preview matches instantly in your browser.

How to use

  1. Enter a regex pattern and flags (e.g. gi).
  2. Paste text to test against.
  3. Review the matched results.

FAQ

Is my text uploaded?

No, matching runs locally in your browser.

Which flags are supported?

Standard JavaScript flags like g, i, m, s, u, y.

Why does my regex fail?

The pattern or flags may be invalid for JavaScript RegExp.