Number Base Converter
Convert numbers between binary, decimal, hexadecimal, octal and base 36, even very large numbers. Free online base converter.
✓ 100% free ✓ No sign up ✓ Runs in your browser — nothing uploaded
Decimal
255
Binary 11111111
Hexadecimal FF
Octal 377
Base 36 73
How to use Number Base Converter
- 1Enter your numbers or dates.
- 2Results update instantly as you type.
- 3Copy the main result with one click.
Questions
Is Number Base Converter free?
Yes. Number Base Converter is 100% free with no limits, no watermark, no sign up and no email required.
Is my data sent anywhere?
No. Everything is calculated locally in your browser. Nothing you type is sent to or stored on any server.
Does Number Base Converter work on my phone?
Yes. Number Base Converter works in any modern browser on iPhone, Android, Windows, Mac, Linux and Chromebook. No app or install needed.
Do I need to create an account?
Never. There is no sign up, no login, no email and no paywall. Just open the page and use it.
How accurate is it?
Calculations use standard formulas with full floating-point precision. For medical, legal or financial decisions, please confirm with a professional.