Type a Number in Any Base
Free Number Base Converter
Computers, networking, color codes, and low-level programming all lean on number systems other than the decimal one we use day to day. This tool converts a number between Binary, Decimal, Hexadecimal, and Octal instantly — type into any field and the other three update automatically.
Where are these bases actually used?
Binary is the native language of computer hardware — every bit is a 0 or 1. Hexadecimal is a compact way to represent binary data and shows up constantly in color codes (#FF5733), memory addresses, and error codes. Octal appears in Unix file permissions (like chmod 755) and some older systems. Decimal is what we use in everyday counting.
Who uses a base converter?
Programmers debugging memory addresses or bitwise operations, students learning computer science fundamentals, network engineers working with subnet masks, and anyone setting Unix file permissions.