Developer toolLiveRuns on your device
Number Base Converter
Convert whole numbers between binary, octal, decimal, hexadecimal and any base from 2 to 36. Works with very large and negative integers, and shows two's complement for 8 to 64 bits.
How to use
Number Base Converter in three steps
- 01
Type a number in any base.
- 02
Every other base updates instantly.
- 03
Copy the value you need.
FAQ
Good to know
No practical one — numbers are handled as arbitrary-precision integers (BigInt), so long values convert exactly.
How computers store negative integers in a fixed number of bits. Pick 8, 16, 32 or 64 bits to see the bit pattern.
No. The tool runs inside this browser tab. Your input is processed in memory on your device and is gone when you close the tab.
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