Regex Tester
Test regular expressions with live match highlighting and a quick reference.
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About Regex Tester
A regular expression is a search pattern for finding text that follows a shape: all the phone numbers, every date, anything ending in .com. This lets you build one and watch what it matches in real time, with a cheat sheet beside you.
When people use it
- Developers writing a pattern without guessing whether it works
- Working out why a search-and-replace is catching the wrong things
- Learning regular expressions by seeing them work
- Validating what people type into a form