Number Base Converter
Convert a value between binary, octal, decimal and hexadecimal — enter a number in any base and see all four at once. Covers binary-to-decimal, decimal-to-binary, hex-to-decimal and more. Calculated in your browser.
- 100% free
- Private & safe
- Runs in your browser
Why use Number Base Converter?
Number Base Converter converts instantly and accurately in your browser, showing every unit or format side by side so you can copy the one you need.
- Runs instantly in your browser — nothing to install, nothing uploaded.
- Completely free, with no account, no watermarks and no usage limits.
- Bases: 2, 8, 10, 16
- Enter a value.
- Works on any device — desktop, tablet and phone — and is fully keyboard accessible.
How to use Number Base Converter
- Enter a value.
- Choose its base.
- See binary, octal, decimal and hex.
- Copy any representation.
Examples
- 255 in decimal is FF in hex.
- Converting 1010 binary to decimal.
Supported formats & limits
- Bases: 2, 8, 10, 16
Limitations
- Works with non-negative integers.
Frequently asked questions
Does it do hex to binary?
Yes — enter hex and read the binary output.
Negative numbers?
It focuses on non-negative integers.
Uploaded?
No — local only.
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