Free online number base converter. Convert between decimal, binary, hexadecimal, and octal instantly. Perfect for programmers and students.
Type a number in any supported base.
All four bases update instantly as you type.
Click any value to copy it to your clipboard.
Q: What bases are supported?
A: Decimal (10), Binary (2), Hexadecimal (16), and Octal (8).
Q: How accurate is the conversion?
A: The conversion is exact up to JavaScript's integer precision (safe up to 2^53).
Q: Can I convert from any base?
A: Yes, you can enter a number in any base and all others update automatically.