AI Regex Generator
Describe what you want to match in plain English and get a regular expression — with an explanation and example.
What is a regular expression?
A regular expression (regex) is a pattern used to match character combinations in text. Regex powers search-and-replace, input validation, parsing, and text extraction across virtually every programming language and editor. But the syntax is famously hard to write and read — which is exactly where an AI generator helps.
How this tool works
Describe your goal in plain English — "match a valid email" or "find dates in YYYY-MM-DD format" — and the AI returns a pattern, suggested flags, a plain-English explanation of how it works, and an example string it matches. You can copy the pattern straight into your code.
Common regex flags
g— global: find all matches, not just the first.i— case-insensitive matching.m— multiline:^and$match line boundaries.
Tips
- Be specific about the format you want ("exactly 4 digits", "optional country code").
- Always test generated patterns against real sample data.
- Regex flavors differ slightly between languages — verify in your target environment.
Is it free?
Yes — free to use: 5 AI generations a day anonymously, or 10 a day when signed in (free). Pro removes the daily limit.