Binary, Hexadecimal, Decimal & Octal Converter
Type into any of the four radix fields to convert across all number bases in real time with exact BigInt precision.
What does the Binary & Hexadecimal Converter do?
The Herramix Binary, Hexadecimal, Decimal & Octal Converter is built for computer engineers, digital electronics designers, embedded firmware developers, and PLC programmers. Typing a number into any of the four radix inputs immediately updates the other three bases.
Because it runs on native arbitrary-precision integers (BigInt), you can convert 64-bit, 128-bit, or 256-bit hardware registers without floating-point precision loss. It also formats binary output into 4-bit nibbles for easy inspection.
Usage example
Input: Type decimal 255 (or hexadecimal FF).
Result: Binary 11111111 (8 bits / 1 byte) · Hexadecimal FF · Octal 377.
Frequently Asked Questions
How do you convert binary to hexadecimal manually?
Split the binary number into 4-bit groups (nibbles) starting from the right, then replace each 4-bit group with its corresponding hex digit (from 0000 = 0 to 1111 = F).
What is the maximum integer size supported?
Powered by modern JavaScript BigInt, this tool supports integers hundreds of bits wide—far beyond 32-bit and 64-bit limits—with bit-exact accuracy.
Can I paste numbers containing spaces or 0x / 0b prefixes?
Yes. The parser automatically strips whitespace, underscores, and standard prefixes such as 0x (hex) or 0b (binary).