Regex Cheatsheet
A modern regular expression playground with live matching, visual railroad diagrams, rich notes, and easy sharing.
Regex Cheatsheet launched on January 31, 2020 with 499 votes, #15 of 3,486 launches that month and more than 99% of that year's launches. The site was still online in September 2026, 6 years on.
In plain words
Regex Cheatsheet is a reference guide for regular expressions, launched in 2020. It provides developers and programmers with quick access to regex patterns and syntax for pattern matching tasks. The site serves as a practical resource for anyone working with text processing, search operations, or data validation. It strips away complexity by organizing common regex patterns in an accessible format, making it useful for both beginners learning regular expressions and experienced developers needing quick pattern lookups.
written from the facts on this page · September 2026
From the sources
Test patterns, see their structure, document the tricky parts, and share a durable workspace with your team. Internet Protocol version 6 (IPv6) is the most recent version of the Internet Protocol. This is used to provide identification for devices in a network. Matches a date in the format dd/mm/yyyy , dd-mm-yyyy or dd.mm.yyyy A Social Security number (SSN) is a nine-digit number that the U.S. government issues to all U.S. citizens and eligible U.S A ‘slug' is the part that comes at the very end of a URL, and refers to a specific page or post. Usually a combination of word that separated with hyphen A bitcoin address is the address string which identifies a bitcoin cryptocurrency wallet.…from ihateregex.io
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