How to use this tool
Enter digits without 0x, 0o or 0b prefixes. Negative integers are supported and BigInt preserves exact values.
A quick example
255 in decimal becomes ff in hexadecimal.
Supported formats & limitations
Integers only. Maximum 10,000 input digits; invalid digits for the chosen base are rejected.
Does this tool upload my input?
No. Tool processing happens in your browser. Your input and result are not automatically saved. The host may still receive ordinary page access logs.Read about privacy.