Regex
Regex Cheat Sheet
Common regular-expression tokens and examples. Test patterns safely in the FreeToolMate regex tester — matching stays in your browser.
Quick tokens
.— any character except newline\d— digit ·\w— word character ·\s— whitespace^/$— start / end of string*·+·?— zero-or-more · one-or-more · optional[abc]— character class ·[^abc]— negated(...)— capturing group ·(?:...)— non-capturinga|b— alternation
Examples
- Email-ish:
^[^@\s]+@[^@\s]+\.[^@\s]+$ - Digits only:
^\d+$ - Hex color:
^#?[0-9a-fA-F]{6}$ - ISO date:
^\d{4}-\d{2}-\d{2}$
Try it
Open the Regex Tester to highlight matches against any string. Invalid or huge patterns are rejected so a bad expression cannot freeze the tab for long.