Number Base Converter
Convert integers of any size between binary, octal, decimal, hexadecimal and any base from 2 to 36, powered by BigInt.
Runs locally · nothing uploaded
How to use the Number Base Converter
- 1
Choose the base of your input (2 to 36).
- 2
Type the number; 0x, 0o and 0b prefixes and _ separators are accepted.
- 3
Read the binary, octal, decimal, hexadecimal and custom-base results, optionally grouped.
What happens to your data
Conversion runs in your browser with BigInt. Nothing is uploaded.
Frequently asked questions
Is there a size limit?
No practical one. Conversion uses JavaScript BigInt, so very large integers convert exactly.
Does it support negative numbers?
Yes. A leading minus sign is kept in every base.