How to Use This Tool
Our client-side bcrypt generator and checker enables web developers, system administrators, and security researchers to easily compute and validate password hashes. Whether you are generating test credentials for local database seeding or verifying if an authentication hash corresponds to a given plain-text secret, this utility operates with zero server latency and total privacy.
- To Generate a Hash: Select the "Generate Hash" tab, type your plain-text secret into the input box, select your desired work factor (salt rounds), and click "Generate Bcrypt Hash". The tool will instantly construct a compliant 60-character Bcrypt hash.
- To Verify a Hash Match: Switch to the "Verify / Match" tab, input the plain-text password alongside the target hash string (beginning with
$2a$,$2b$, or$2y$), and click "Test Hash Match". Our client-side engine will evaluate whether the candidate secret matches the stored hash key. - Copy and Clear Controls: Use the "Copy Hash" button to transfer generated digests to your clipboard or hit "Clear All" to instantly wipe input buffers.
Understanding Bcrypt Hashing, Work Factors, and Security
Bcrypt is an adaptive cryptographic hash function designed specifically for secure password storage. Based on the Blowfish cipher and designed by Niels Provos and David Mazières, Bcrypt incorporates an adjustable cost factor (work factor) to remain resilient against hardware acceleration attacks, GPU cracking arrays, and rainbow table lookups.
A standard Bcrypt hash string consists of four distinct components separated by dollar signs ($):
- Prefix (Algorithm Identifier): Identifies the revision version, such as
$2a$,$2b$, or$2y$. Modern implementations typically output$2b$. - Cost Factor (Rounds): A two-digit exponential value (e.g.,
10represents 210 = 1,024 key expansion iterations). - Salt: A 128-bit (22-character Base64-encoded) random salt appended automatically to prevent pre-computed dictionary attacks.
- Hash Ciphertext: The resulting 184-bit (31-character Base64-encoded) encrypted checksum payload.
When you generate bcrypt hash online or test bcrypt salt parameters using our tool, processing occurs entirely within your browser's WebAssembly and JavaScript environment. Because no credentials or hash strings are transmitted across remote API servers, your secrets remain strictly local to your workstation.