Integer Base Converter
Convert integers between binary, octal, decimal and hexadecimal online for free. Supports 0x/0b/0o prefixes, negative values and arbitrarily big numbers.
| Binary | 11111111 |
|---|---|
| Octal | 377 |
| Decimal | 255 |
| Hexadecimal | FF |
| Grouped hex | FF |
About Integer Base Converter
Convert integers between binary (0b), octal (0o), decimal and hexadecimal (0x). Pick the input base or type a prefixed literal like 0xFF.
Backed by BigInt, so arbitrarily large values are handled exactly — not limited to 32 or 64 bits. Negative numbers are supported too.