Bcrypt Hash Encryptor
Securely encrypt passwords and verify hashes with custom salt cost factors entirely in your browser.
Generate Hash
Higher rounds exponentially increase time to hash, defending against brute-force attacks.
Verify Hash
What is this tool?
The Bcrypt Toolkit generates salted password hashes and verifies plaintext passwords against existing bcrypt hashes. It runs a dedicated Web Worker to handle the computationally intensive key derivation without locking the browser interface, and supports custom salt rounds between 4 and 16.
How to generate and verify bcrypt hashes
- To generate a hash: enter your plaintext password and choose the salt cost factor (rounds 4 to 16).
- Click Generate Hash to compute the bcrypt string in a background thread.
- To verify a hash: enter the candidate plaintext string and paste the target bcrypt hash in the verification section.
- Click Compare to test whether the candidate password matches the hashed signature.
Key Features
- Generates cryptographically secure bcrypt hashes with configurable salt rounds (4–16)
- Verifies plaintext strings against standard bcrypt hash signatures ($2a$, $2b$, $2y$)
- Offloads expensive CPU computation to a background Web Worker to keep the UI responsive
- One-click copy to clipboard with toast notifications
- Complete client-side processing without transmitting passwords
Frequently Asked Questions
What are bcrypt salt rounds?
Salt rounds define the work factor, representing exponential 2^rounds hashing iterations. A higher round count increases resistance against brute-force attacks at the expense of higher computation time.
What is the recommended salt round setting for production?
A work factor of 10 to 12 is generally recommended for production authentication systems, balancing security with reasonable server response times.
Can a bcrypt hash be reversed to recover the password?
No. Bcrypt is a one-way cryptographic hash function, not reversible encryption. Passwords can only be verified by re-hashing candidate inputs with the extracted salt and comparing the outputs.
Is it safe to test passwords on this tool?
Yes. Computation occurs entirely in a local browser Web Worker using JavaScript. Passwords and hashes are never transmitted across the network or stored.
Privacy First
Hashes are generated and verified entirely in an isolated browser Web Worker. No passwords are sent over the network.