Hex string → integer

Paste a hex string (optional 0x)—decimal value up to 12 hex digits.

Digits 0–9, A–F; max 12 hex digits.

FAQ

How is hexadecimal parsed?

Leading/trailing spaces are trimmed, an optional 0x prefix is removed, then the remaining characters must be hex digits (0–9, A–F), up to 12 characters, interpreted via BigInt as an unsigned value in base 16.

Does the decimal separator matter?

This calculator uses plain decimal numbers. If a result looks wrong, check whether you used a comma instead of a dot (or vice versa) where the field expects one.