Argon2 Hash
Generate Argon2 password hashes with configurable parameters
Input
About this tool
Argon2 is the winner of the Password Hashing Competition and is considered one of the most secure modern algorithms for hashing passwords, designed to resist both brute-force and specialized hardware attacks (like GPU cracking). This tool generates and verifies Argon2 hashes for testing or learning purposes.
How to use this tool
- Enter a sample passwordUse a test value (not a production secret) so you can safely experiment with hashing parameters.
- Set Argon2 parametersTune memory cost, time cost, and parallelism to match your security and performance target.
- Generate hash and verifyCreate an Argon2 hash, then test verification to confirm the same input validates correctly.
- Copy into your auth stackUse the generated settings as a baseline for your backend implementation and benchmark there.
Key features
- Tests modern password hashing with memory-hard protection against GPU attacks.
- Lets you see how parameter tuning affects real-world hashing cost.
- Supports both generation and verification in one workflow.
- Useful for developers migrating from BCrypt to Argon2id.
Common uses
- Evaluating secure password-hash defaults for a new authentication system.
- Comparing Argon2 parameter sets before deploying to production.
- Teaching security teams why memory hardness matters in password storage.
- Validating existing Argon2 hashes during migration or incident review.
Tips for better results
- Prefer Argon2id for general-purpose password storage unless your policy requires a different variant.
- Benchmark on your production-like hardware before finalizing parameters.
- Store algorithm + parameters with each hash so future verification remains stable.
- Use a separate random salt per password; never reuse salts across users.
Mistakes to avoid
- Setting memory cost too low, which removes much of Argon2's hardware-resistance advantage.
- Treating one benchmark from a laptop as production-ready security tuning.
- Using Argon2 as encryption instead of password hashing.
- Pasting real credentials into testing tools during experimentation.
Frequently asked questions
Both are designed to be slow/resistant to brute-force attacks, but Argon2 is newer and specifically tunable for memory usage as well as time cost, making it more resistant to attacks using specialized hardware like GPUs, which is why many modern systems prefer it over BCrypt.
They control how much computing resources are required to compute the hash - higher values make it slower and more resource-intensive to brute-force, at the cost of also being slower for legitimate use.
Hashing runs in your browser, but avoid pasting real production passwords into any third-party tool as a general precaution - use test values when exploring how Argon2 behaves.
Yes. Argon2 is free for normal use with no account required, and ToolBox does not add a watermark to your result.
Most tools in this category run in your browser so the file stays on your device. If a tool needs a temporary server job, files are handled for that job only and are not kept as a lasting archive.
No install needed. Open Argon2 in your browser, add your file or paste your input, then download or copy the result.
Yes on modern mobile browsers. For large files, a desktop browser is usually faster and more reliable.
Try a different quality or format setting, use a smaller input, or open a related tool (for example compress before convert). Keep a copy of the original file before replacing it.
People also search for
- argon2 online free
- argon2 no signup
- free argon2 in browser
- free argon2 online
- argon2 without uploading
- best free argon2