Number Bases

Convert integers between binary, hex, Base64, and any base up to 64

Binary base 2

Decimal base 10

Hex base 16

Base64 base 64

Add base

Digits run 0-9 A-Z a-z + /, so bases above 36 are case-sensitive and base 64 is positional — 1234 is JI, not the byte encoding the Base64 tool gives. 0x / 0b / 0o prefixes and underscores between digits are accepted.