Can I customize a pattern after copying it, or do I need to use it exactly as given?

You can adjust any pattern to fit your specific needs — they're meant as correct, tested starting points, not rigid, unmodifiable templates.

Which common patterns are included?

Frequently needed ones like email addresses, URLs, phone numbers and similar everyday validation patterns.

Are these patterns tested and reliable?

Yes, they're standard, well-established patterns rather than something generated on the fly, which is exactly the point versus writing one from memory.

Does Regex Generator upload my files to a server?

No. Regex Generator runs entirely in your browser using on-device processing, your files never leave your device.

Regex Generator

Copy ready-made regular expressions for common patterns.

Runs in your browser

Email address

URL

IPv4 address

US phone number

Indian mobile number

Hex color

Date (YYYY-MM-DD)

Slug (kebab-case)

Whitespace only

Digits only

About this tool

Writing a regular expression from scratch for a common pattern — matching an email address, a phone number, a URL — means either remembering fiddly syntax or searching for one online and hoping it's actually correct. This tool gives you ready-made regular expressions for common patterns, so you get a tested, correct pattern instead of writing (and likely debugging) one from memory.

Frequently asked questions

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