entropy

simple password entropy calculator written in c, because you should not have to paste passwords into random websites.

there are intentionally no releases available. read the code and compile it yourself.

it hides the password while you type it, then prints an estimated brute-force entropy score in bits.

this is not a magic password strength checker. it does not know if your password is a word, a pattern, or something you reused somewhere else. it only calculates the character-pool estimate for printable ascii input.

windows:

gcc main.c -o entropy.exe -lm -Wall -Wextra -pedantic

or with msvc:

cl /W4 /Fe:entropy.exe main.c

linux:

gcc main.c -o entropy -lm -Wall -Wextra -pedantic

mac:

clang main.c -o entropy -lm -Wall -Wextra -pedantic

license

wtfpl. do what you want.