genpass 
A simple yet robust commandline random password generator.
Multiplatform (Linux, Mac, Windows). Fast.
You can use it generate keys or passwords in scripts or use it as your primary desktop password generator.
Has extensive generative test suite, including tests against a Rust port of Dropbox's password strength tester zxcvbn
Typical usage
genpass # use defaults, they're good
genpass 2048 # generate long password, can be used as a key
genpass --passphrase 128 # generate longer passphrase
genpass -dlu # no special characters
Generating a password directly into your system clipboard
On a Mac:
genpass | pbcopy
On Linux:
genpass | xclip -selection clipboard
Installation
On a system with Rust installed:
$ cargo install genpass
Commandline options
$ genpass --help
USAGE:
genpass [FLAGS] [length]
FLAGS:
-h, --help Prints help information
-d, --include-digit Include at least one digit
-l, --include-lowercase Include at least one lowercase letter
-s, --include-special Include at least one special (non-alphanumeric) character
-u, --include-uppercase Include at least one uppercase letter
--passphrase Create a passphrase of (at least) the given length instead of a password.
--version
ARGS:
<length> The length of the password to generate [default: 32]
A note on passphrases
- Passphrases are generated using EFF's "long" password list.
- Passphrases are at least
--lengthcharacters long, not necessarily exactly that long.
A road to 1.0
TODOs to get genpass to 1.0
Contributing
All contributions welcome ! Ideally - start a discussion with an issue first before contributing a PR.