Number Base Converter
Convert binary, decimal, hexadecimal, and other bases, including large integers.
Spaces and _ between digits are ignored. A minus sign is kept. 0x, 0b, and 0o prefixes are fine.
Any base from 2 to 36, such as 36 for short IDs.
Your result
Type a whole number and see it in every base.
How to use it
- Type the number.
- Choose the base it is written in, or Other for any base from 2 to 36.
- Press the card you need to copy it.
Examples
- Decimal to hex255 FF
- Binary to decimal1010 10
- Hex to binaryFF 1111 1111
Tool details and privacy
Type a number and choose its base to see it in decimal, hex, binary, octal, and a base you choose, on cards you copy with one press.
Colours, permissions, bit masks, and short IDs use different bases, and converting by hand is easy to get wrong.
Options
- Spaces and _ between digits are ignored; 0x, 0b, and 0o prefixes and Arabic digits are accepted.
- Binary and hex are shown in groups of four for reading and copied without spaces.
- A minus sign is kept.
Limits
- Whole numbers only, up to 1000 digits, no fractions.
- A digit that does not belong to the base is named in the message.
Privacy
What you type stays in your browser. Nothing is uploaded or saved on the server.
Questions
Can it handle very large numbers?
Yes, without losing precision.
What is base 36 for?
It writes big numbers as short letters and digits, such as IDs.
Are fractions accepted?
No.
Is anything uploaded?
No.