Skip to content

Regular expression tools

Test, explain and build regular expressions with live match highlighting.

Regex TesterTest JavaScript regular expressions against sample text with live match highlighting, named capture groups and a replace preview — all six flags explained.Glob Pattern TesterTest glob and .gitignore patterns against a list of paths and see exactly which rule matched each one — including which negation won.Regex GeneratorBuild a regex from labelled blocks, or infer one from examples that should and should not match — verified against both sets before you're asked to trust it.Regex Cheat SheetEvery token, quantifier, class, group and lookaround on one searchable page — each with a live example you can run, and the flavour differences called out.