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ToolBay

Regex Tester Online Free

Test regular expressions against sample text with real-time match highlighting and capture group extraction.

  • Processed in your browser
  • Privacy-first
  • No account required
  • Nothing uploaded by default

Examples

Email pattern

Matches standard email addresses.

\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Z|a-z]{2,}\b

How Regex Tester works

Test regular expressions against sample text with real-time match highlighting and capture group extraction. Runs locally in your browser.

  1. 1. Add input. Paste, type, or upload. Use a sample if you just want to see it work.
  2. 2. Run it. Processing happens in the browser.
  3. 3. Copy or download. Take the output and close the tab.
  • Email pattern
Which regex flavor is supported?
We use JavaScript RegExp (ECMAScript) syntax.

ToolBay does not store your input. Close the tab and it is gone. More text tools.

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