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Argon2id Hasher & Verifier

Plain text
Hash output
HASHmodesingleinput3iterations65536 KiBmemory4parallelism

Hash and verify workflows

Use this argon2 generator to compute argon2id online hashes from plain text, or switch to Verify mode to check if plain text matches an existing hash string. The tool generates a fresh random 16-byte salt for every hashing operation, meaning identical password inputs will safely yield different encoded outputs.

Your inputs are never uploaded or stored on a server.

Parameter tuning

You can control the cost of the Argon2id computation using three parameters.

  • Iterations dictates the time cost (number of passes).
  • Memory (KiB) controls the memory-hard cost to resist GPU attacks.
  • Parallelism sets the number of parallel threads or lanes.

If you set Memory above 131,072 KiB or Iterations above 10, the tool issues a warning because excessive values may freeze your browser tab. A timing badge in milliseconds helps you measure the real-world cost of your chosen parameter combinations.

Batch processing

Enable the “Batch by newline” option to hash or verify multiple items simultaneously. In Hash mode, it computes a separate encoded hash for each plain text line. In Verify mode, it aligns your plain-text lines with a list of hashed lines to confirm the exact number of matches and mismatches.

Frequently Asked Questions

It generates Argon2id hashes from plain text and verifies plain text against existing Argon2 hashes. You can tune iterations, memory cost, and parallelism in hash mode, switch to verify mode, and process single values or multiple lines in batch mode.

This tool uses Argon2id, which is widely recommended for password hashing because it balances resistance to GPU attacks and side-channel considerations better than using weaker general-purpose hashes for passwords.

In hash mode, the tool generates a new encoded Argon2id hash using a fresh random salt for each value. The output includes the Argon2 parameters and salt in the encoded hash string.

In verify mode, the tool compares your plain text input against an existing Argon2 hash and reports whether they match. In batch mode, it compares each input line against the corresponding hash line.

Iterations control the time cost, Memory controls the memory cost in KiB, and Parallelism controls how many lanes or threads the hash uses. Together they determine how expensive the hash is to compute and verify.

Because the tool generates a fresh random salt for each new hash. That is expected and desirable for password hashing. Different encoded hashes can still verify correctly against the same original password.

Yes. Turn on Batch by newline to hash one input per line or verify each plain-text line against the corresponding Argon2 hash line.

No. , so your input and generated hashes stay on your device.

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