Number Base Converter
Convert numbers instantly between binary, octal, decimal and hexadecimal, with a live update across every base as you type in any one of them.
Runs entirely in your browser — nothing is uploaded.
About Number Base Converter
Convert numbers instantly between binary, octal, decimal and hexadecimal, with a live update across every base as you type in any one of them.
- Type in any base and the others update simultaneously.
- Handles large values cleanly using arbitrary-precision integers.
- Copy any representation with a single click.
Number Base Converter is part of Upwwards Tools, a free collection of browser-based utilities built by the team at Upwwards. Like the rest of the suite, it's free, requires no sign-up, and keeps your data on your device.
Frequently asked questions
What is Number Base Converter?
Convert numbers instantly between binary, octal, decimal and hexadecimal, with a live update across every base as you type in any one of them.
Is Number Base Converter free to use?
Yes — Number Base Converter is completely free with no sign-up, account or usage limits. It is part of the free Upwwards Tools collection built by Upwwards.
Is my data private when I use Number Base Converter?
Number Base Converter runs entirely in your browser. Everything you enter or upload is processed locally on your device and is never sent to a server, stored or logged.
Do I need to install anything to use Number Base Converter?
No. Number Base Converter works instantly in any modern web browser on desktop or mobile — there is nothing to download or install.