Argon2 Hash Generator Online | Password Hashing

Q: Can I change memory, iterations, or parallelism?

No. The current values are 65536 KiB of memory, four iterations, and parallelism one. The form does not expose parameter controls.

Q: Why does hashing the same password produce different strings?

A new random salt is generated for each run. The salt is stored in the encoded result, allowing a verifier to check the password later.

Q: Should I store the whole Argon2 string?

Yes. Keep the variant, version, parameters, salt, and digest together. Removing parts of the encoded string can prevent verification.

Q: Does the output-format selector change the Argon2 hash?

No. The result remains a complete encoded hash string. Hex and Base64 radio choices do not provide a raw-hash mode on this page.

Q: Is the text processed entirely in my browser?

No. The current form sends its input to the calculation API. Use non-sensitive sample data when testing.

This Argon2 hash generator creates a salted password hash from text or encoded bytes. Use it to prepare development fixtures and understand the encoded value needed for verification. Password hashing is one-way; it does not encrypt a password for later decryption.

Input Encoding:

Auto / Live

Input text

Salt (Optional / Auto-generated)

Iterations / Work Factor

Key Length (Bytes)

Output Format:

Hex (lower)

Hex (UPPER)

Base64

Argon2 Hash Result

Live

How to use Argon2 Hash Generator

Use the steps below to create a Argon2 password hash.

Create a Argon2 password hash

Type or paste a non-sensitive test password into Input text.
Use Input Encoding: to describe the password: UTF-8 for normal text, or Hex or Base64 for encoded bytes.
Keep Auto / Live on to update the result as you edit. To work manually, turn Auto / Live off and click Run.
Read Argon2 Hash Result and retain the complete encoded string.
Click Copy to copy the result. Use Clear where shown, or a field's clear control, to clear the text.

For a reproducible verification example, the test password million-test matches $argon2id$v=19$m=65536,t=4,p=1$WOTd/tGxakQ5SF4t61ZueA$/5pJ3KHg0yZxoK9yPKNLkUDCOlLu4Q1cyR2VDypU+Ls. A new run uses a fresh random salt when none is supplied, so its full output will differ.

Read the encoded result

The generator uses Argon2id version 19 with m=65536 KiB, t=4, and p=1. It generates a random 16-byte salt and a 32-byte hash. These settings are fixed in this form; the output is a complete encoded hash.

Retain the verification parameters

The encoded string records the variant, version, memory cost, iterations, parallelism, salt, and hash. Store that whole string for later verification. The output-format radio buttons do not convert it to a raw digest.

Frequently asked questions

Which Argon2 variant does this generator use?

It generates Argon2id hashes. This interface has no selector for Argon2i or Argon2d.

Can I change memory, iterations, or parallelism?

Why does hashing the same password produce different strings?

Should I store the whole Argon2 string?

Does the output-format selector change the Argon2 hash?

Is the text processed entirely in my browser?

Egor Volchenko Developer & Author

Hi! I’m a WordPress developer with over 10 years of experience. I love Tailwind CSS, clean code, and intuitive interfaces. I’m currently working on million.tools — a service with convenient online tools for everyday tasks. I’m building it from scratch with great attention to detail and user experience.

Argon2 Hash Generator