Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal.
100% Free Forever
Free Number Base Converter
Convert numbers between binary (base-2), octal (base-8), decimal (base-10), and hexadecimal (base-16). Essential for programming and digital electronics.
How to use this tool
- 1
Enter a number
Choose the source base.
- 2
See all conversions
Binary, octal, decimal, and hex are shown side by side.
Pro tips
- Hex is common in colors (#FF6600), binary in low-level programming.
Frequently asked questions
Does it handle negative numbers?
Yes — and decimals are supported in base-10.