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regex101
Build and test regular expressions with live matching and a plain-English explanation.
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- Added
- Oct 27, 2026
- Source
- regex101.com
regex101 is the easiest way to build and debug regular expressions. As you type, it highlights matches and explains each part of the pattern in plain English.
What you can do with it
- Test a pattern against sample text
- Switch between PHP, JavaScript, Python, Go and other flavours
- Save and share a regex with a link
Good to know
It's free. The quick-reference panel is a great way to learn regex syntax.
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