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Argon2d hash generator.

Type a password and read its Argon2d hash, salted with 16 random bytes, at the memory cost you pick. Argon2d is the data-dependent Argon2: the strongest against GPUs, open to timing side channels; everything runs in your browser and nothing is uploaded.16 salt bytes97+ characters2015 published0 bytes uploaded

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Argon2d hash generator.

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How it works

4 steps, no account. It runs in your browser and nothing is uploaded.

  1. Enter the password

    Type or paste the password, or drop a file onto the input; the tool waits for a pause before it starts.

  2. Pick the algorithm and cost

    Argon2d is the default; switch to Argon2id and bcrypt, and pick the cost the login can afford.

  3. Read the encoded hash

    The encoded hash carries the salt and the parameters; press Rehash for a fresh salt.

  4. Verify, copy or download

    Paste a stored hash to check it against the input, or copy and download the new one.

Password hashes against each other

A password hash is slow on purpose. It costs the server a few milliseconds per login and an attacker the same per guess, billions of times over.

  • Argon2id

    2015, RFC 9106, the Password Hashing Competition's winner. Memory-hard. The first pass data-independent, the rest data-dependent: resists GPUs and side channels both. The recommendation.

  • Argon2d

    The data-dependent variant: the strongest against GPU cracking, but its memory accesses depend on the password, so a shared machine can leak timing. For mining and proofs of work.

  • Argon2i

    The data-independent variant: safe against side channels, weaker against GPUs for the same cost. Mostly superseded by Argon2id.

  • bcrypt

    1999, from Blowfish. A cost factor doubles the work each step; a 72-byte input limit; 60-character hashes. Still sound, still everywhere.

  • scrypt

    2009, memory-hard before Argon2 existed. Tunable N, r, p. In Tarsnap, Litecoin and many password managers.

  • PBKDF2

    2000, RFC 2898: HMAC iterated many thousand times. Not memory-hard, so GPUs crack it fast; kept where FIPS compliance requires it.

  • SHA-256

    Fast by design, which is the problem: a GPU tries billions a second. Fine for integrity, never for storing passwords.

  • MD5

    Faster still, and broken. Unsalted MD5 password tables are the breaches you read about.

Related tools

Nearby in the hash generators. Every one free, in the browser.

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Questions and answers

Before you trust the result: what to know about the format, the limits and your data.

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