Number Base Converter
Binary, octal, decimal and hex in one place.
How to use Number Base Converter
follow along with the steps below
1Open the tool on this page and add a number.
2Adjust the options if you need to. Results update right on the page.
3Copy or download the value in other bases. Nothing is uploaded, so you can repeat as often as you like.
About Number Base Converter
Number Base Converter is a free online tool from Supreme Pro. Binary, octal, decimal and hex in one place. It runs in your browser, so there is nothing to install and no account to create. Converters should be instant and exact, so the maths runs right in your browser.
Common uses
- Convert quickly between units, formats and systems
- Check measurements when shopping, cooking, travelling or studying
- Avoid manual maths and rounding mistakes
Tips for best results
- Type in either box, the other one updates live
- Check the number of decimals if you need high precision
- Bookmark the pair of units you use most often
Features
- Lets you convert between binary, octal, decimal and hexadecimal
- Free to use, no account or sign-up
- Private — runs entirely in your browser
- Works on phones, tablets and computers
Practical tips
Binary uses digits 0 and 1, octal 0-7, decimal 0-9 and hexadecimal 0-9 plus A-F. Hexadecimal is popular in programming because two hex digits represent exactly one byte. Check which base your result is in before copying it into code.
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Quick answers about using Number Base Converter.
What is the Number Base Converter?
The Number Base Converter is a free online tool from Supreme Pro. Binary, octal, decimal and hex in one place. You can use it to convert between binary, octal, decimal and hexadecimal.
How do I use the Number Base Converter?
Open this page, add a number in the tool above, adjust any options you want and read or download the value in other bases. Everything happens on the same page, so there is nothing to install.
Is the Number Base Converter free?
Yes. The Number Base Converter is free to use and does not need an account or sign-up.
Is my data safe when I use the Number Base Converter?
Yes. The tool runs in your browser, so anything you add — such as a number — is processed on your own device rather than being sent to our servers.
Does the Number Base Converter work on mobile phones?
Yes. The page is responsive and works in modern browsers on phones, tablets and computers.
Can I use the Number Base Converter offline?
Once you have opened this page, your browser can often reload it without a connection because Supreme Pro saves its core files for offline use. Open it once while online first.
How accurate are the results?
Results are calculated from the values you enter using standard methods. For important financial, health or legal decisions, double-check the figures with a qualified professional.
Why do programmers use hexadecimal?
It is a compact way to write binary. One hex digit stands for four bits.
Can it convert negative numbers?
Negative values depend on how a system stores them, so check the tool's note before relying on the result.
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