Bcrypt Hash Generator & Verifier
Generate and verify adaptive password hashes in your browser. Uses PBKDF2-SHA256 via Web Crypto as a pure-JS fallback for bcrypt-style testing.
PBKDF2 Hash Generator & Verifier
Generate and verify adaptive password hashes directly in your browser. Uses PBKDF2-SHA256 via the Web Crypto API as a pure-JS fallback for bcrypt-style testing and learning.
Running in PBKDF2 fallback mode
The bcryptjs package is not installed, so true bcrypt isn’t available client-side. This tool substitutes PBKDF2-SHA256 (Web Crypto) with an adaptive cost factor mapped from the familiar bcrypt “rounds” parameter. Output format: $pbkdf2-sha256$rounds$salt$hash.
Generate Hash
Security Notes
Never run client-side hashing for real authentication.
This tool is for testing, learning, and generating reference hashes only. Production password hashing must happen on the server, behind rate limits, with a vetted library (bcrypt, argon2, scrypt). The client can never be trusted to enforce cost factors or keep the plaintext out of attackers’ hands.
Why bcrypt (and bcrypt-style KDFs)?
- Adaptive cost: the
roundsfactor lets you increase work as hardware gets faster, without changing the algorithm. - Salt built-in: every hash embeds a unique random salt, so identical passwords still produce different hashes and rainbow tables are useless.
- GPU/ASIC-resistant: bcrypt’s memory-access pattern (and argon2’s explicit memory hardness) makes massively parallel cracking expensive compared to plain SHA-256.
- Slow by design: a legitimate login tolerates 100 ms of work, but an attacker trying billions of guesses cannot.
Frequently Asked Questions
Is this real bcrypt?
No — bcryptjs is not installed, so the tool falls back to PBKDF2-SHA256 via Web Crypto. It is an adaptive salted KDF with a configurable cost factor, fine for testing and learning.
What does the rounds slider do?
Rounds is the cost factor; it maps to PBKDF2 iterations via 2^rounds x 1000. Each round doubles the work, keeping hashes strong as hardware improves.
Can I use this for real auth?
No. Never hash passwords client-side for real authentication. Hash on the server with a vetted library (bcrypt, argon2id, scrypt) behind rate limiting.
Is the Bcrypt Hash Generator & Verifier free to use?
Yes, the Bcrypt Hash Generator & Verifier is 100% free with no registration, no hidden fees, and no usage limits. All processing happens locally in your browser, ensuring complete privacy.
Is my data safe with this tool?
Absolutely. The Bcrypt Hash Generator & Verifier processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.
Does the Bcrypt Hash Generator & Verifier work on mobile devices?
Yes, the Bcrypt Hash Generator & Verifier is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.
Do I need to create an account to use this tool?
No account or registration is needed. Simply open the Bcrypt Hash Generator & Verifier in your browser and start using it immediately. There are no sign-up walls or usage restrictions.
How do I use the Bcrypt Hash Generator & Verifier?
Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.
Which browsers are supported?
The Bcrypt Hash Generator & Verifier works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.
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About Bcrypt Hash Generator & Verifier
Bcrypt Hash Generator & Verifier is a free, browser-based tool in our Security Tools collection. Everything runs locally on your device — no uploads, no sign-up, and your data stays private.