🔐 Argon2 Generator

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{{ memory }} KB
{{ time }}
{{ threads }}
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{{ result.hash }}
Variant: {{ result.variantName }}
Memory: {{ result.options.memory_cost }} KiB
Time: {{ result.options.time_cost }} iterations
Threads: {{ result.options.threads }}
{{ verifyResult.verified ?'✅' :'❌' }}
Hash Variant: {{ verifyResult.info.variant }}
Parameters: m={{ verifyResult.info.parameters.m }}, t={{ verifyResult.info.parameters.t }}, p={{ verifyResult.info.parameters.p }}
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Variant: {{ getAnalysisInfo().variant }}
Version: {{ getAnalysisInfo().version }}
Memory Cost: {{ getAnalysisInfo().parameters.m }} KiB
Time Cost: {{ getAnalysisInfo().parameters.t }} iterations
Parallelism: {{ getAnalysisInfo().parameters.p }} threads
Security Level: {{ getSecurityLevel() }}
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  • Use Argon2id for password hashing (hybrid security)
  • Memory cost should be as high as your system allows
  • Test performance on your production hardware
  • Minimum 64MB memory for production applications
  • Higher parameters = better security but slower performance
  • Store the full hash including all parameters
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ℹ️ About Argon2 Generator

Argon2 is a memory-hard password hashing and key derivation function designed to make offline password guessing expensive on CPUs, GPUs, and custom hardware. It was selected as the Password Hashing Competition winner and is specified for implementers in RFC 9106.

Use this generator when you need a salted Argon2 hash for application password storage, test fixtures, authentication migrations, password verification workflows, or comparing Argon2 parameters before deploying them in your own stack. The generated string uses the standard encoded form, for example $argon2id$v=19$m=65536,t=4,p=3$..., so the variant, version, memory cost, time cost, parallelism, salt, and hash output travel together.

Technical parameters:

  • Variant: Argon2id is the recommended default for password hashing; Argon2i uses data-independent memory access and is useful where side-channel resistance is the primary concern.
  • Memory cost: The KiB of RAM required per hash. Higher values increase the cost of large-scale cracking but also increase server load.
  • Time cost: The number of passes over memory. Increase it until verification is slow enough to resist guessing but still acceptable for users.
  • Parallelism: The number of lanes or threads. Match this to your runtime and deployment resources instead of blindly maximizing it.
  • Salt and version: Argon2 hashes include a unique salt and version marker, commonly v=19 for Argon2 version 1.3.

Concrete examples:

  • Generate an Argon2id hash with 64 MiB memory, 3-4 passes, and 1-4 lanes for a web login prototype.
  • Verify a password against an existing $argon2id$... or $argon2i$... hash during an authentication test.
  • Compare an old bcrypt, PBKDF2, or scrypt policy with a memory-hard Argon2id policy before planning a password-hash migration.

Algorithm strength guidance:

  • Recommended for new password storage: Argon2id with parameters tuned on your production-class hardware.
  • Acceptable for compatibility: bcrypt, scrypt, or PBKDF2 when your platform requires them and the parameters are current.
  • Not suitable for passwords: fast general-purpose hashes such as MD5, SHA-1, SHA-256, SHA-512, or unsalted checksums.

The OWASP Password Storage Cheat Sheet recommends modern adaptive password hashing and parameter tuning rather than a fixed universal cost. Choose settings that fit your login latency budget, then revisit them as hardware gets faster.

Limitations and privacy: Argon2 protects stored password hashes; it does not make weak passwords strong, encrypt data, or replace rate limiting and breach monitoring. This tool sends the entered password to the API endpoint to generate or verify a hash, so do not paste real production passwords or customer secrets into it.

API Usage Example:

POST /api/tools/crypto/argon2
Content-Type: application/json

{
    "password": "mySecretPassword123",
    "variant": "argon2id",
    "memory": 65536,
    "time": 4,
    "threads": 3
}
Ready