Hashes a password with Argon2id (WASM).
The Argon2 Hash tool turns any password into an Argon2id hash directly in your browser using a WebAssembly build of the algorithm. Argon2id is a modern memory-hard key derivation function (KDF) recommended for password storage, and this tool generates a random salt for each run so you can quickly produce a hash for testing, fixtures, or learning how Argon2 output looks.
No. Hashing runs entirely in your browser via WebAssembly, and your password never leaves your device or gets uploaded anywhere.
It uses Argon2id with a parallelism of 1, 3 iterations, 4096 KiB of memory, and a 32-byte hash length. A fresh 16-byte random salt is generated for every hash.
A new random salt is generated on each run, so the output changes every time even for identical input. This is expected and is what makes Argon2 hashes resistant to precomputation attacks.
The tool returns the standard Argon2 encoded string (the $argon2id$... format), which embeds the variant, parameters, salt, and digest so it can be stored and verified later.
Not in this tool. The salt is always randomly generated and the cost parameters are fixed, so it is intended for quick hashing rather than tuning Argon2 settings.