Number Base Converter — Binary, Hex, Decimal, Octal
Convert between binary, octal, decimal, and hexadecimal with BigInt precision. Interactive bit grid, 0b/0o/0x prefixes, and 8–64-bit views — all in your browser.
Your data never leaves your browser
Bit map (32-bit, click to toggle)
Binary: 11111111
Octal: 377
Decimal: 255
Hexadecimal: FF
About this tool
BigInt precisionBit grid0b/0o/0x8–64 bitPrivate
How to use
- Type in any base field.
- All other bases update instantly.
- Click bits in the grid to toggle values.
Examples
255
Decimal 255
FF hex, 11111111 binary