Complete regular expression cheat sheet with examples. Character classes, anchors, quantifiers, groups, lookahead, lookbehind, flags. Search patterns, click to copy. Free regex reference.
Complete regular expression reference with character classes, anchors, quantifiers, groups, lookahead, lookbehind, and flags. Each pattern includes syntax, description, and examples. Search and filter patterns, click to copy, and test your regex with the built-in quick tester.
Encode text to Base32 (RFC 4648) and decode Base32 to text, with UTF-8 support. All in the browser.
developerEncode text to Base64 or decode Base64 to text online. Supports UTF-8. Free Base64 converter tool.
developerPerform arithmetic on binary numbers: add, subtract, multiply, divide. Convert results between bases.
developerCalculate Unix file permissions. Convert between symbolic (rwxr-xr-x) and numeric (755) chmod notation. Free chmod permission calculator.
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