Argon2 Hash Generator

Argon2 is a memory-hard password hashing function that won the Password Hashing Competition in 2015. It was designed by Alex Biryukov, Daniel Dinu, and Dmitry Khovratovich from the University of Luxembourg. Argon2 is standardized as RFC 9106 and is recommended by OWASP as the primary password hashing algorithm.

There are three Argon2 variants:

• Argon2d — Data-dependent memory access. Optimized for resistance against GPU and ASIC attacks. Suitable for cryptocurrencies and systems with no threat of side-channel attacks.
• Argon2i — Data-independent memory access. Optimized for resistance against side-channel attacks. Suitable for password hashing and key derivation.
• Argon2id (recommended) — Hybrid mode. Uses Argon2i for the first half of the first pass and Argon2d for the rest. Provides the best of both worlds — side-channel resistance and GPU/ASIC resistance.

Argon2id Hash Format

• $argon2id$ — Algorithm variant
• v=19 — Version (0x13 = 19)
• m=65536,t=4,p=2 — Memory (KiB), time cost, parallelism
• Next — Base64-encoded salt (16 bytes)
• Last — Base64-encoded hash (variable length)

1. Enter a password — Type or paste the password you want to hash.
2. Set memory cost — Higher values require more RAM. Default is 64 MB (65,536 KiB).
3. Set time cost — Number of iterations. Default is 4.
4. Set parallelism — Number of threads. Default is 2.
5. Click "Generate Argon2 Hash" — The server computes the hash using PHP's password_hash() with PASSWORD_ARGON2ID.
6. Copy the hash — Use the copy button to save the hash.