Binary Decimal Hex Converter

How base conversion works

A number base describes how many symbols are used to write a value. Decimal uses ten symbols, binary uses two, octal uses eight, and hexadecimal uses sixteen. The value is the same number, but the written representation changes.

For example, decimal 255 is binary 11111111, hexadecimal FF, and octal 377. Developers and network engineers switch between these formats when reading byte values, masks, flags, memory addresses, and protocol data.

Why hexadecimal is common

Hexadecimal is compact because one hex digit maps cleanly to four binary bits. That makes it easier to inspect binary data without reading a long string of ones and zeroes.

You see hex in color codes, MAC addresses, packet captures, hashes, byte dumps, memory addresses, and debugging output.

Binary and byte boundaries

Binary values are often grouped in fours or eights because that lines up with hex digits and bytes. This converter groups long binary output so the result is easier to scan.

The byte helper focuses on one 8-bit value at a time. Values from 32 through 126 are printable ASCII characters, while lower control values and higher extended byte values may not show as normal text.

Common conversion mistakes

Common mistakes include confusing the written base with the actual value, dropping leading zeroes when a fixed byte width matters, or assuming every byte maps to a printable character. When exact width matters, keep track of whether you need 8-bit, 16-bit, 32-bit, or 64-bit output.