Regex
Test and debug regular expressions across PCRE, JavaScript, and Python flavors. See matches highlighted, capture groups extracted, and quantifier behavior explained.
All Regex
- Regex Tester Test regular expressions against text. PCRE, JavaScript, and Python flavors.
- Regex Explainer Break down a regex into plain English. Explains each token, group, quantifier.
- Regex Cheatsheet Searchable reference of regex syntax: classes, quantifiers, lookarounds, flags.
- Regex from Examples Paste examples of strings to match; get a regex that matches them all.
- Regex Replace Tester (Live, with Capture Groups) Test regex find + replace with capture group references ($1, $&). Live preview, all flags.