Regex Generator
Describe what you want to match in plain English and get a real, working regular expression with an explanation — tested live against your sample. Free.
Generate a regex
Describe what you want to match in plain English. AI builds the regular expression and explains it.
What this regex generator does
Common use cases
- 1Building a validation pattern
- 2Extracting data from text
- 3Writing a search-and-replace regex
- 4Learning how a pattern works
- 5Matching a specific format
- 6Prototyping a parser rule
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About regular expressions
A regular expression (regex) is a compact pattern for matching text — validating input, searching, or extracting data. They are powerful but famously hard to write and read, which is exactly where describing the goal in plain English helps.
This tool uses AI to produce a real JavaScript regex with an explanation, then tests it live against any sample you provide so you can see it work. Regexes are sensitive to edge cases, so always validate the result against real data before shipping it.
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Got Questions? We Have Answers.
How does it generate the regex?
It sends your plain-English description to an AI model that returns a real JavaScript regular expression with an explanation of each part.
Is the pattern tested?
Yes. If you paste a sample, the generated pattern is compiled and run against it in your browser so you can see whether it matches before using it.
Which regex flavour is it?
Standard JavaScript (ECMAScript) regex syntax, which is close to PCRE. Minor differences exist in other languages, so validate in your target environment.
Can I trust it blindly?
Treat it as a strong starting point. Regexes are sensitive to edge cases like accents and formats, so always test against real data before shipping.