AI Regex Generator

An AI regex generator turns a plain-English description into a working regular expression. Instead of remembering arcane syntax like \d{3}-\d{4} or lookaheads, you simply describe what you want to match — "an email address", "a hex color", "a US phone number with an optional country code" — and the tool writes the pattern for you, complete with an explanation and example strings that match and don't match.

Regular expressions are powerful but famously hard to write and read. This tool is built for developers, data analysts, and anyone wrangling text who knows what they want but not the exact syntax. It returns a portable pattern that works in JavaScript and most PCRE-compatible engines, recommends the right flags (like global or case-insensitive), and breaks the pattern down piece by piece so you actually understand it — not just copy it blindly.

Because the matching logic is generated by a large language model, your description is sent securely to our server for processing; it is not stored. Don't paste secrets or personal data, and always test the generated pattern against your real inputs before shipping it — regexes have edge cases, and an AI-written one is a strong starting point, not a guarantee. The tool is free and needs no sign-up.