Number Base Converter Free
Converts a number between binary, octal, decimal and hexadecimal, showing all four at once.
| Base | Result |
|---|
About this tool
Very large integers convert exactly, without the rounding that ordinary number types cause.
Negative numbers are supported; enter a - before the number.
This tool runs entirely in your browser. Nothing you enter is sent to our server.
When to use it
Useful for converting a color code, a file permission value, a memory address or a network mask between binary, octal, decimal and hexadecimal.
FAQ
- Can I enter hexadecimal letters (A–F) in lowercase?
- Yes, both uppercase and lowercase are read the same way.
- Can it convert negative numbers?
- Yes. Enter a - before the number.
- How do I copy just one of the converted values?
- Press "Copy" at the right of the row for that base.