Number base converter
Converts numbers between binary, octal, decimal, and hex.
- Free
- No sign-up needed to try
- Runs in your browser
Sign in to use this tool
Number base converter is free once you're signed in — one quick account unlocks every tool on Alux Tools, no payment, ever.
How this works
Enter a number in any supported base and it's parsed and re-rendered in the other three bases.
Nothing you enter is sent to a server.
Frequently asked questions
Is the number base converter free?
Yes. Number base converter is free to use, with no software to install and no hidden fees.
Is my data uploaded anywhere?
No. This tool runs entirely in your browser, so what you enter or select never leaves your device.
Does it work on phones and tablets?
Yes. It works in any modern browser on Android, iPhone, iPad, Windows, Mac and Linux.