Regex Tester

Enter a pattern and test text to highlight every match and inspect capture groups. Use $1 and $2 to preview replacements, and pick from ready-made email, phone, URL or IP patterns.

Processed locally, never uploadedNo sign-upFree

Key features

  • Live highlighting of every match and capture group
  • g, i, m, s, u and y flags plus replacement preview
  • Built-in email, phone, URL and IP patterns

How to use

  • Open the page and start; no account required.
  • Enter text or choose a file, then press Ctrl / ⌘ + Enter to run.
  • Copy or download the result; everything runs locally in your browser.

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