What is Number Base?
Number Base Converter translates a value between binary (2), octal (8), decimal (10) and hexadecimal (16) — the four bases you meet every day.
How to use
- Type a value into any of the four fields.
- The other three update in sync.
- Copy whichever you need.
Example
Use this sample to confirm what Number Base does before pasting your own data.
Input
255 (decimal)
Output
Binary 11111111 | Octal 377 | Hex ff
Uses BigInt — arbitrary-precision integers supported.
When to use it
Use Number Base for quick local checks, debugging, documentation prep, and one-off conversions where opening a full IDE or command-line workflow would be slower. For production-critical data, always review the output before committing or shipping it.
Frequently asked questions
How large can the value be?
It uses BigInt, so arbitrary-precision integers are supported.
Are negative numbers supported?
Yes — a leading minus sign is preserved.