Regex Cheat Sheet

Use this regex cheat sheet as a compact reference, then test every expression in the Regex workspace with realistic input.

Anchors and character classes

• ^text$ matches the complete string.
• \d, \w, and \s match a digit, word character, and whitespace.
• [A-Z] matches one uppercase Latin letter; [^0-9] matches a non-digit.
• . matches one character except a newline unless the s flag is used.

Groups and repetition

• (abc) captures a group; (?:abc) groups without capturing.
• (?<name>abc) creates a named group in JavaScript.
• +, *, and ? mean one-or-more, zero-or-more, and optional.
• {2,4} matches between two and four repetitions.

JavaScript flags

Use g for all matches, i for case-insensitive matching, m for line anchors, s for dot-all, and u for Unicode-aware patterns. Regex uses JavaScript syntax, so check your destination environment before copying a pattern.