AI Regex Generator
Describe what you want to match in plain English and get a working regular expression.
The AI Regex Generator writes regular expressions from a plain-English description. Instead of memorizing cryptic syntax, just describe what you want to match — "a US phone number", "words inside quotes", "an ISO date" — and get a ready-to-use pattern with a short explanation.
Why use it
- Save time — skip the trial-and-error of building patterns by hand.
- Learn faster — the explanation shows why the pattern works.
- Cover edge cases — describe the tricky variations in words and let the AI encode them.
From description to working pattern
Be specific: mention the format, allowed characters, and any examples that should or should not match. Then copy the generated expression into your code or our Regex Tester to confirm it behaves exactly as expected before shipping it.
Privacy
Your description is sent through our secure proxy to the AI model; the API key stays on the server. Generated regular expressions are deterministic to test, so verification is quick.
Frequently Asked Questions
Which regex flavor does it produce?↓
JavaScript-compatible regular expressions, which also work in most other languages with minor tweaks.
Does it explain the pattern?↓
Yes — it returns the regex, a one-line explanation, and example matches.
Should I test the result?↓
Always test against your real data. Pair it with our free Regex Tester to verify matches instantly.