Number Base Converter
Convert numbers between decimal, binary, octal and hex. Free, private and instant.
About the Number Base Converter
Computers work in binary, while people use decimal. Hex and octal are compact ways to write binary values.
When to use it
Use it to read memory addresses, color codes and permission bits, or to check homework and bitwise code.
How to use the Number Base Converter
- Enter or paste your input in the fields above.
- The result updates as you type, or press Run.
- Press Copy to copy the output.
Frequently asked questions
Is the Number Base Converter free?
Yes. It is completely free, with no signup and no usage limits.
Is my data uploaded anywhere?
No. Everything runs locally in your browser, so what you type never leaves your device.
Does the Number Base Converter work on mobile?
Yes. The tool is responsive and works on phones, tablets and desktops.
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