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About This Tool
Number Base Converter instantly translates any integer between the four most common numeral systems—decimal (base 10), binary (base 2), octal (base 8), and hexadecimal (base 16)—and any arbitrary base between 2 and 36. Type in any field and all others update in real time.
The custom base panel lets you enter a number in a base you define, making it easy to work with trinary (base 3), balanced bases, duodecimal (base 12), or any other radix system used in mathematics, computing, or cryptography.
Negative numbers are supported, and the tool clearly labels each output with its base prefix (0b for binary, 0o for octal, 0x for hex) so results are copy-paste-ready for use in code.