🔢Number Base Converter
Convert binary, octal, decimal & hex.
About the Number Base Converter
Convert numbers between binary, octal, decimal and hexadecimal instantly. Type a value in any base and see all the others. Free online number base (radix) converter for developers and students.
How to use the Number Base Converter
- 1Enter your numbers into the Number Base Converter fields above.
- 2Adjust the rate, period, units or other options to match your situation.
- 3Your result is calculated instantly as you type — there's no submit button.
- 4Nothing is stored or uploaded; every calculation runs privately in your browser.
Why use this tool?
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Private by design
The Number Base Converter runs entirely in your browser — nothing you enter is uploaded to a server.
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Free, no signup
Use it as much as you like. There's no account, no paywall and no watermark.
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Fast & instant
Results appear the moment you type or click — no waiting, no page reloads.
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Works anywhere
Any device or browser, even offline once the page has loaded.
Frequently asked questions
Which number bases are supported?＋
Binary (2), octal (8), decimal (10) and hexadecimal (16). Enter a value in any base to see all the others.