Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal. Free, fast, and works entirely in your browser with no sign-up required.
Input
0123456789…
Supports negative (−123) and arbitrary BigInt values
Bit length8
Byte count1
Popcount (1s)8
SignPositive
JS Safe Integer
Yes
Power of 2
No — next: 256
Color
#0000FF
RGBrgb(0, 0, 255)
Quick Values
All Bases — Real-time Conversiondec: 255
BinaryBinary (Base 2)
0b11111111
1111 1111
OctalOctal (Base 8)
0o377
DecimalDecimal (Base 10)
HexadecimalHexadecimal (Base 16)
0xFF
Base-32Base-32
Base-64Base-64 (numeric)
Color Preview
#0000FF · rgb(0, 0, 255)