Regex Generator - Describe It, Get the Pattern
Describe the pattern you want to match in plain English and get a correct, working regex. Works with Python, JavaScript, PCRE, .NET, and more. No account required.
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AI Regex Generator for Python, JavaScript, and PCRE
Writing regular expressions by hand is error-prone and slow. A misplaced quantifier or forgotten escape turns a working pattern into one that silently matches the wrong strings. Our AI regex generator takes your plain-English description and produces the correct pattern - with an explanation of what each part does so you can understand, test, and modify it.
Whether you need a basic email validator, a complex URL extractor, or a named capture group pattern for log parsing, describe it and get the regex in seconds. Specify your language (Python, JavaScript, Go, Ruby) for syntax-accurate output. Pair it with our Code Explainer to understand any snippet that uses regex, or use our Error Explainer when your pattern throws an exception. For extracting data with shell commands, see our Bash Command Generator for grep and sed patterns.
What the Generator Handles
Why Developers Use an AI Regex Generator
Even experienced developers look up regex syntax. The character class rules, the difference between greedy and lazy quantifiers, the way lookaheads interact with capture groups - it's a lot to hold in memory. Describing what you want and getting the correct pattern immediately is just faster. The AI also generates test cases you can use to verify the pattern before deploying it.
Python uses named groups as (?P<name>...), JavaScript uses (?<name>...). Specify your language and get syntax that actually runs.
Every generated regex includes a breakdown of what each part does - so you can modify it later without having to re-derive it from scratch.
Paste any regex you found in a codebase or Stack Overflow and ask what it does. Get a plain-English breakdown of every group and quantifier.
The generator shows example strings that match and strings that don't - so you can verify the pattern before running it on real data.
No regex documentation tab-switching. Describe, generate, copy, and test in one place. Available 24/7 with no account or login required.
Not quite right? Ask for a tweak in plain English - "also allow a plus sign at the start" - and the pattern is updated in the same conversation.
Common Regex Use Cases
The most frequent requests our regex generator handles.
Email addresses, phone numbers, postal codes, credit card numbers, URLs, IP addresses - validate user input with patterns you can trust.
Extract timestamps, error codes, IP addresses, and user agents from server logs with named capture groups for each field.
Find-and-replace across a codebase, reformat date strings, normalize whitespace, strip HTML tags - regex patterns for sed, grep, or your IDE.
Pull product codes, order IDs, prices, or any structured data out of unstructured text using capture groups and lookaheads. Combine with our JSON to CSV converter for export.
Frequently Asked Questions
(?=...), (?!...)), lookbehinds ((?<=...)), non-capturing groups, and atomic groups where supported by the flavor.re.MULTILINE in Python, /m in JavaScript).