Free Online Number Base Converter
Binary, octal, decimal, hex
About Number Base
Convert numbers between binary, octal, decimal, and hexadecimal. See all representations simultaneously. Useful for low-level programming, networking, and computer science.
How to Use Number Base
- 1
Enter a number
Type a number in any supported base (binary, octal, decimal, or hex).
- 2
View conversions
All base representations update in real time.
- 3
Copy any value
Click copy next to the base you need.
Frequently Asked Questions
Is my data safe?
Yes. All processing happens entirely in your browser. Your data never leaves your device and is never uploaded to any server.
What number bases are supported?
Binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16).