Regex from English (AI)
Describe a pattern in plain English and get a tested regular expression with examples.
🔒 Bring-your-own-key — your key is sent only with this request and never stored. Get a key from Anthropic or OpenAI.
About this tool
Describe the pattern you want in plain English and the AI returns a regular expression, an explanation and example matches. Bring your own key.
Frequently asked questions
What regex flavour does it output?
A .NET / PCRE-compatible expression, plus a short explanation and example matches.
Should I still test the regex?
Yes — pair it with the Regex Tester tool to validate against your real inputs before shipping.
Do I need my own API key?
Yes. This tool is bring-your-own-key: paste your own Anthropic or OpenAI key and it is used only for that single request — never stored on our servers.