Library for generating secure passwords from within Emacs. Simple and intuitive; see Example

Linux, BSD, macOS, and other Unix-like systems only until I can find a way to fetch sufficiently random characters from Emacs for Windows (see Built-in pseudo-random number generator).

(pwdgen length with-chars &optional without-chars)

Call the pwdgen function from Lisp or the Eshell to generate a secure password of length characters using the characters with-chars, optionally excluding the characters in without-chars. You can use regex character alternative notation for with-chars and without-chars. Like so:

(pwdgen 32 "A-Za-z0-9")    ; Generate a 32-character password with only alphanumeric characters
⇒ "6sud2B3eRTcGWnS8ttOBJaS0YfJyKVWm"
(pwdgen 16 "!-~" "A-Za-z") ; Generate a 16-character password using all printable ASCII characters EXCEPT letters
⇒ "!,*#':3_$~8;'0|]"

See the documentation of the pwdgen function for more details.

If you use the amazing Eshell, pwdgen acts like other command-line password generators:

~ $ pwdgen 32 A-Za-z0-9
MYHdBLc9P7l3GPRPMNnj2IoQJVB5T3k9
~ $ pwdgen 16 "!-~" A-Za-z
/1&]-%(/#"79@#[>