DocomintRegex Generator
Get a ready-to-use regular expression for common patterns like email, URL, phone number, and more.
Rather than writing a regular expression for a common pattern from scratch — and getting an edge case wrong, like an email regex that rejects a valid "+" alias — this gives you a tested expression for the pattern types people search for most, plus a plain-language note on exactly what it matches (and doesn't).
Example: Picking "Email address" returns ^[\w.+-]+@[\w-]+\.[a-zA-Z]{2,}$ — good for form validation, though like most simple email regexes it won't catch every edge case the full RFC 5322 spec allows.
How it works
- Pick the kind of pattern you need
- Press Generate
- A tested regular expression and a plain-language explanation appear instantly, on your device
Frequently asked questions
Will the generated regex catch every possible edge case?
These are solid, widely-used patterns for everyday validation, but no simple regex perfectly matches the full formal spec for something like email addresses (RFC 5322) — for critical validation, pair this with a real verification step (like a confirmation email).
Is my data uploaded anywhere?
No — Regex Generator runs entirely in your browser using JavaScript/WebAssembly. Your data is never sent to a server.
Can I tweak the generated pattern's strictness, like requiring a specific phone format?
Not through the generator's options directly — it returns one tested pattern per type. Copy the result into Regex Tester to experiment with modifications against your own sample text.