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Regex Tester

Test and validate regular expressions with live matching

What this tool does

Regex Tester helps you test and validate regular expressions with live matching.

What you get

Regex Tester produces a direct output in this page and keeps all processing on your device, with nothing uploaded to our servers.

Free to use, no watermarks, runs in your browser—nothing uploads to our servers

Regular Expression Pattern

Global (g) - Find all matches Case Insensitive (i) Multiline (m)

Test String

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Report a bug

If this tool misbehaves, share a quick summary so we can investigate. We include the tool URL automatically—no need to copy and paste.