Create an Argon2id password hash with your chosen memory, iterations and parallelism, or verify a password against one.
Press “Hash or verify” to see the result.
It is the modern recommended password hash, resistant to both GPU and side-channel attacks.
Around 19 MiB memory with 2 iterations is a common minimum; raise them as far as your server allows.
No. Everything is worked out in your browser and nothing you type is sent to a server.