About Bcrypt Password Hash Generator & Verifier Studio
Professional, client-side Bcrypt password hash generator and verification studio. Computes cryptographically secure Blowfish-based Bcrypt hashes formatted in standard Modular Crypt Format ($2b$, $2a$, or $2y$). Features customizable work cost factor (4 to 14 rounds), automatic 128-bit cryptographically secure salt generation via Web Crypto API, real-time hashing duration benchmarks in milliseconds, modular hash breakdown (prefix, cost, salt, checksum), and password matching verification without transmitting passwords over the internet.
Key Capabilities & Features
- Client-side Bcrypt generation supporting $2b$, $2a$, and $2y$ standard prefixes
- Adjustable work cost factor slider from 4 (testing) up to 14 (high security)
- Secure 128-bit salt generation using native window.crypto.getRandomValues
- Integrated hash verification tester to check if plaintext passwords match hashes
- Detailed modular crypt format decomposition (prefix, cost, 22-char salt, 31-char hash)
- Instant one-click copyable hash string with benchmark execution time
How to Use Bcrypt Password Hash Generator & Verifier Studio
Enter Password
Type your plaintext password into the secure input field.
Select Work Factor & Prefix
Choose your desired cost factor (default 10) and Bcrypt version prefix ($2b$).
Generate Hash
Click 'Generate Bcrypt Hash' to compute the hash in local memory.
Copy or Verify
Copy your generated hash or switch to the 'Verify' tab to test password matching.
Privacy & In-Browser Execution Guarantee
100% Client-Side. Your plaintext passwords, salts, and hashes are computed strictly in local browser memory with zero network requests.
Frequently Asked Questions
What is the recommended Bcrypt cost factor for production applications?
A cost factor between 10 and 12 is generally recommended for production web applications. A cost factor of 10 represents 1,024 key expansion iterations (taking ~50-100ms), while 12 represents 4,096 iterations, providing strong resistance against GPU and ASIC brute-force attacks.
What is the difference between $2a$, $2b$, and $2y$ Bcrypt prefixes?
'$2a$' is the original OpenBSD implementation specification. '$2y$' was introduced in PHP 5.3.7 to fix a specific 8-bit character bug. '$2b$' is the current universal standard introduced in OpenBSD 5.5 to fix a wraparound length error and is the recommended modern prefix.