About this tool
Convert a number between binary, octal, decimal and hexadecimal, all at once. Backed by BigInt, so it handles very large integers exactly without rounding. Click any result to copy it.
Frequently asked questions
Can it handle huge numbers?
Yes. It uses BigInt arithmetic, so even very large integers convert exactly with no precision loss.
What is hexadecimal used for?
Base-16 is compact and maps neatly to bytes, so it is common for colors, memory addresses and binary data.