Number Base Converter

Convert a number between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16) all at once — type in any base and see the others update live. It handles the mental math you'd otherwise do by hand when reading low-level values.

Useful for decoding color hex codes, reading file permissions in octal, working with bitmasks and flags, or interpreting memory addresses and byte values. Runs entirely in your browser.