01
Choose Action
Select the 'Generate Hash' tab to create a new hash, or 'Verify Hash' to compare a plaintext password against an existing hash.
Bcrypt Hash Generator Online
Generate secure cryptographic Bcrypt password hashes or verify password matches. Adjust round cost factors and perform check validations safely in your browser.
Developer Cryptography
Bcrypt Hash Generator & Verifier
4 (Fastest)10 (Default)12 (Secure)14 (Very Slow)
How to use
Use this tool in three simple steps
Our workflow is designed to be straightforward, allowing you to complete your task in seconds.
02
Configure Rounds
For new hashes, adjust the cost factor slider (rounds 10 is the industry standard).
03
Verify Diagnostics
Click generate or verify to view live computed signatures and match details instantly.
Fast results
Numbers update in real time, so iteration stays quick.
Focused UI
Clean hierarchy keeps actions and outputs easy to scan.
SEO ready
Structured sections improve readability and crawlability.
Scalable shell
New tools can reuse this layout without UI drift.
Use cases
Useful for different workflows
Hash Creation
Generate secure, slow-hashing passwords using custom cost factors.
Verify Hashes
Match plain text inputs against stored Bcrypt structures.
Backend Integrations
Check testing credentials match password verification schemas.
Tool guide
What is Bcrypt?
Bcrypt is a password-hashing function designed by Niels Provos and David Mazières. It is based on the Blowfish cipher and was presented at USENIX in 1999. It incorporates a work factor (cost rounds) and automatically handles random salting, making it exceptionally robust against offline cracking.
Why Bcrypt is Safer Than MD5 & SHA
Common hash functions like MD5 and SHA-256 are designed to be extremely fast. While great for file verification, they are vulnerable to password cracking. Hackers can check billions of SHA-256 hashes per second using GPUs. Bcrypt is deliberately slow and memory-intensive, slowing down brute-force attacks to a crawl.
Understanding the Cost Factor / Rounds
Bcrypt's work factor determines how many times the key expansion algorithm runs. Every increment in the rounds doubles the execution time. This "key stretching" is future-proof: as hardware gets faster, developers can simply increase the cost factor rounds to keep cracking attempts impossibly slow.
FAQ
Frequently asked questions
How does the Bcrypt verifier work?
The verifier extracts the salt and cost factor embedded within your existing Bcrypt hash. It then hashes your plaintext password using those identical variables. If the resulting signatures match, the verification is successful.
Is this tool safe for real passwords?
Our Bcrypt generator runs entirely client-side using JavaScript. Your passwords never cross the network. However, as a best developer practice, never enter active production credentials into any online tool.
Why does generating higher rounds take longer?
Bcrypt utilizes key stretching. Higher round values double the workload exponentially (e.g. 11 rounds is twice as slow as 10). This prevents GPU brute-forcing by making iterations computationally expensive.
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