Regex · Validation

Regex builder.

Pick what you want to match and get a regular expression for it. Paste some text below to see exactly what it catches, highlighted as you type.

Private by design: everything runs in your browser. Nothing you type is sent anywhere or saved, and this page has no analytics.

1What do you want to match?

How you’ll use it

Check a whole valueA form field must be exactly this Find it inside textPick matches out of an email or a note

Ignore upper and lower case

Regular expression

Text to test

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