Number Base Converter
Convert numbers between binary, octal, decimal, and hex.
Convert whole numbers between binary, octal, decimal, and hexadecimal. Enter a value in any base and get the equivalents in the others instantly.
Runs entirely in your browser — nothing is uploaded.
How to use the number base converter
- 1Enter a number and choose its base.
- 2Read the equivalent in binary, octal, decimal, and hex.
- 3Copy the value you need.
Frequently asked questions
Does it handle large numbers?
It supports standard safe integers; values beyond JavaScript's safe integer range may lose precision.
Can I convert negatives or decimals?
Enter positive whole numbers for reliable conversion — negatives and fractions aren't supported.