Bcrypt Password Verifier
Private by design — runs entirely in your browser
Verify that a bcrypt hash matches a given password, in your browser. Toova lets you test password verification, inspect the cost factor, and explore bcrypt behavior without exposing real credentials to a third-party server.
What bcrypt does and why it matters
Bcrypt is a password-hashing function designed to be slow. Slowness is the feature — it makes brute-force attacks prohibitively expensive, even with modern hardware. Every modern web framework ships bcrypt support, and any password stored as MD5 or plain SHA-256 is essentially in plaintext. Toova helps you debug bcrypt verification flows without exposing real password data.
Cost factor and structure
A bcrypt hash looks like $2b$12$... where the $2b$ identifies the algorithm version and 12 is the cost factor — how many rounds of computation are required. Each step up doubles the time. Toova surfaces the cost factor so you can verify that your application is using a recent value (10-13 is the modern range) instead of an outdated low cost from old code.
Local-only verification
The verification runs entirely in your browser. Your test password and target hash never leave the page. That matters because bcrypt operations are slow by design — a third-party server would log every attempt and potentially leak the password. With Toova, you can debug your authentication flow safely without exposing real credentials.
Frequently Asked Questions
- What is a good bcrypt cost factor?
- 10 to 13 in 2026. Higher values are more secure but increase login latency. Pick the highest value where a successful login still completes in under 250 ms on your production hardware.
- Can I generate a bcrypt hash here?
- Yes. Toova can both generate hashes and verify a candidate password against an existing hash. Generation respects the cost factor you set.
- Why does bcrypt produce a different hash each time?
- Bcrypt embeds a random salt in every hash. Two hashes of the same password look completely different. The verification function compares the candidate password against the salt baked into the hash, which is why the same password verifies against any of its hashes.
- Is bcrypt still recommended?
- Yes, it is still a solid choice. Argon2id is the modern winner of the Password Hashing Competition and is arguably better, but bcrypt remains acceptable and is widely supported across languages and frameworks.
- Is my password sent anywhere?
- No. Verification runs entirely in your browser. The password and hash never leave the page.