Free Online Number Base Converter (Binary, Decimal, Hex, Octal) with Text to Binary

Number Base Converter

Binary, octal, decimal, hex and any base from 2 to 36 • 100% free • Runs in your browser

Number converter (type in any box)

Decimal (base 10)

Binary (base 2)

Octal (base 8)

Hexadecimal (base 16)

Custom base

Base (2 to 36) Value in this base

Group digits for easy reading Uppercase letters (A-F) Add prefixes (0b, 0o, 0x)

Number facts

Two's complement and bit view

Bit width

Click a bit below to flip it. The numbers above update right away.

8-bit (1 byte) 16-bit (2 bytes) 32-bit (4 bytes) 64-bit (8 bytes)

Bits (left is the most significant bit)

Text to binary / hex / decimal / octal

Options

Direction Text to code Code to text Code format Binary (8 bits per byte) Hexadecimal Decimal Octal Separator between bytes (Text to code only) Space Comma Comma and space None New line

Input0 characters

Result0 bytes

All processing happens in your browser. Nothing is uploaded. Numbers use arbitrary precision, so very large values work. Text uses UTF-8 encoding.