Converters
Number base converter
Binary, octal, decimal, hex and base 2-36.
- Instant
- Free
- Private (processed locally)
- No sign-up
Convert a number
Enter a value and its input base: the tool shows binary, octal, decimal, hex, plus a base of your choice.
Example
| Base | Value |
|---|---|
| Decimal | 255 |
| Binary | 11111111 |
| Octal | 377 |
| Hexadecimal | FF |
Big numbers (BigInt), 100% local.
Frequently asked questions
What is the maximum base?
Base 36, which uses digits 0-9 then letters A-Z.
Does it handle big numbers?
Yes, via BigInt, with no precision loss even for very large values.
What about negatives?
Yes, add a “−” sign in front of the value.