Argon2id Hash Tool

Generate an encoded Argon2id hash locally and keep the cost parameters visible

Safety note: Argon2id hashing and verification stay in your browser. High memory settings can be expensive on slower devices, so keep test values realistic before you raise the cost.

Hash a password with Argon2idChoose salt and cost parameters, generate a PHC-style encoded Argon2id hash, and copy it directly

Use the sample or generate a new salt when you want a deterministic test versus a fresh hash.

Password to hash

Salt

Salt encoding

Iterations

Memory (KiB)

Parallelism

Hash length

What It Checks

This page produces a standard PHC-style Argon2id string that includes the algorithm, version, parameters, salt, and digest.

Hash or Verify with Argon2id

Enter the password, salt, and parameters, then click Hash with Argon2id.
Copy the full encoded hash, not just the digest segment.
Keep the encoded hash intact. The parameter block is part of what verification needs later.

Why the Parameters Matter

Argon2id is not “just one hash.” Memory size, iterations, and parallelism all affect cost and compatibility. If two systems disagree on those parameters, the same password will not verify.