regex101: build, test, and debug regex
Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/.NET, Rust.
regex101: Regex tutorial
Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/.NET, Rust.
regex101: Community Pattern Library
Search, filter and view user submitted regular expressions in the regex library. Over 20,000 entries, and counting!
Introduction | regex101
Build, test, and ship regex features with confidence. Everything here is focused on practical outcomes: faster debugging, cleaner integrations, and less time wrestling with regex.
regex101: Regex Cheatsheet
Matches·3 Steps·51 Time·4.8 ms (?mx) # x- modifiers to add comments in regex↵ #. #any character, except newline↵ #\s. #only space and newline characters↵ #\w+ #Word quantifiers to match 1 or …
regex101: Replace word
Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/.NET, Rust.
regex101: Email Validator
Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/.NET, Rust.
regex101: test
Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/.NET, Rust.
regex101: Regex Quiz
Learn regex and challenge yourself in a unique regex quiz: play progressively harder levels and compete with others in creating the shortest solutions.
regex101: Address
Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/.NET, Rust.