Argon2 Password Hash Generator

Argon2 Password Hash Generator | Online Free Tool | Elysia Tools

Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category: Security
Input types: textarea, number
Output type: json
Sample coverage: 4
API ready: Yes

Overview

The Argon2 Password Hash Generator allows you to securely hash plaintext passwords using the Argon2id algorithm. You can customize key cryptographic parameters including memory cost, iterations, parallelism, salt length, and hash length to generate standard PHC-formatted strings suitable for modern database storage and authentication systems.

When to use

When implementing secure user authentication systems that require OWASP-recommended Argon2id password hashing.
When testing or verifying backend password verification logic with custom Argon2 parameters.
When generating secure, salt-based cryptographic hashes for configuration files or database seeding.

How it works

1Enter the plaintext password you want to hash in the input field.
2Configure the Argon2 parameters such as memory (KiB), iterations, parallelism, salt length, and hash length.
3Generate the hash to output the standard PHC string format containing the algorithm parameters, salt, and hash.

Use cases

Generating secure password hashes for database seeding scripts during development.
Creating Argon2id hashes for configuration files in applications that use PHC strings for admin authentication.
Testing how different memory and iteration parameters affect the generated hash structure.

Examples

1. Generate OWASP-Compliant Argon2id Hash

Backend Developer

Background

A developer needs to seed a test database with a secure admin user password using OWASP-recommended Argon2id parameters.

Problem

Generating a secure, standard PHC string for the password 'correct horse battery staple' with 19456 KiB memory and 3 iterations.

How to use

Input the password, set Memory to 19456, Iterations to 3, Parallelism to 1, and click generate.

Password: 'correct horse battery staple', Memory: 19456 KiB, Iterations: 3, Parallelism: 1, Salt Length: 16, Hash Length: 32

Outcome

A JSON response containing the algorithm 'argon2id' and the formatted PHC string starting with '$argon2id$'.

2. High-Memory Argon2id Hash Generation

Security Engineer

Background

An engineer is configuring a high-security internal portal and wants to use a higher memory parameter to resist brute-force attacks.

Problem

Generating a hash with 65536 KiB memory and 4 iterations for a master password.

How to use

Enter the master password, adjust the Memory field to 65536, set Iterations to 4, and generate the hash.

FAQ

What is Argon2id?

Argon2id is a hybrid version of the Argon2 hashing algorithm that provides resistance against both GPU side-channel attacks and memory-hard optimization attacks.

What is a PHC string format?

A PHC string is a standardized format for representing password hashes, containing the algorithm name, parameters (like memory and iterations), salt, and the hash itself in a single string.

What are the recommended OWASP settings for Argon2id?

OWASP recommends a minimum of 19,456 KiB of memory, 3 iterations, and a parallelism factor of 1.

Can I customize the salt length?

Yes, you can adjust the salt length between 8 and 64 bytes to meet your specific security requirements.

Is the hashing performed securely?

Yes, the hashing is computed locally in your browser, ensuring your plaintext passwords are never sent to a remote server.

Password: 'super-secure-master-key', Memory: 65536 KiB, Iterations: 4, Parallelism: 2, Salt Length: 16, Hash Length: 32

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Prepared example runs

Inputs

Result

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Generate OWASP-Compliant Argon2id Hash

2. High-Memory Argon2id Hash Generation

FAQ

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