Number Base Converter
Convert numbers between binary, octal, decimal and hex.
Binary11111111
Octal377
Decimal255
HexadecimalFF
How to use
Enter your values above and read the result instantly.
How it works
Everything is computed locally in your browser — nothing is uploaded.
Frequently asked questions
Is it free?
Yes, completely free with no limits.
Is my data private?
Yes, all processing happens in your browser.