Binary Converter
Binary Converter
Convert numbers between binary, octal, decimal and hexadecimal instantly. A must-have for programmers, students and electronics hobbyists.
Number systems explained
- Binary (base 2) — 0s and 1s; how computers store everything.
- Octal (base 8) — digits 0–7; used in Unix file permissions.
- Decimal (base 10) — digits 0–9; everyday counting.
- Hexadecimal (base 16) — digits 0–9 plus A–F; used for colors (#FF0000), memory addresses and hashes.
Frequently asked questions
How do I read hex colors? #FF0000 = 255 red, 0 green, 0 blue.
What characters are valid? Binary: 0–1, Octal: 0–7, Decimal: 0–9, Hex: 0–9 A–F.
Does it handle large numbers? Yes — up to JavaScript’s safe integer limit (9 quadrillion).