Bcrypt Hash Generator
Hash passwords with bcrypt, adjust the cost factor, and verify matches locally in your browser.
Password
Generate bcrypt hash
Choose a value from 4 to 16. Higher values are slower but more resistant to brute-force attacks.
Generated hash
Verify password against hash
Use cases
Common ways developers, QA teams, and support staff use this bcrypt tool:
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Create seed data
Generate bcrypt hashes for local databases, fixtures, or demo accounts without writing a script.
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Verify stored credentials
Check whether a reported password matches the bcrypt hash stored in a database or configuration file.
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Compare cost factors
Test how cost 10, 12, or 14 affects generation time before choosing a default for a new authentication flow.
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Prepare QA fixtures
Create, copy, clear, and repeat quickly when you need multiple known password and hash pairs for automated tests.
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Document real examples
Produce a valid bcrypt example for onboarding guides, migration notes, or API documentation.
FAQ
- How do I use this app?
- Enter or paste the required input, adjust any options, run the primary action, and review the result. Use the Clear/Reset control to start over.
- Is this app free to use?
- Yes. The app is free to use and does not require an account.
- What happens to my input data?
- The app MUST NOT store user-provided input. If any network request is required for a feature, the app MUST clearly disclose it in the Help section.
- Why am I getting an error or unexpected output?
- Most issues come from invalid input or incompatible options. Verify the input format, try the default settings, and use Clear/Reset before trying again.
- Where can I find instructions and troubleshooting tips?
- Use the in-app Help panel. It MUST explain inputs, options, and common mistakes, and it MUST be usable with a keyboard (including closing with Escape).
How to Use Bcrypt Hash Generator
Use this tool to generate a new bcrypt hash or verify whether a password matches an existing bcrypt hash. Everything runs locally in your browser.
How to use it
- Enter the password you want to hash or verify. Use the visibility toggle if you want to confirm what you typed.
- Choose a cost factor from 4 to 16, then select Generate to create a new bcrypt hash locally in your browser.
- Paste an existing bcrypt hash into the verify field and select Verify to check whether it matches the password above.
What this tool includes
- Client-side bcrypt generation and verification, so your password does not need to leave the browser.
- Adjustable cost factor for seed data, fixtures, demos, and production-like testing.
- Copy the generated hash with one click, then use Clear / Reset to start over quickly.
- Keyboard-accessible help panel with Escape support, focus trapping, and focus return to the help button.
Tips and troubleshooting
- Higher cost factors take longer to generate, so choose the lowest value that still fits your security requirements.
- Bcrypt hashes usually start with $2a$, $2b$, or $2y$. If verification fails immediately, double-check the stored hash.
- Only the visibility preference is remembered. Passwords and hashes are cleared when you reload the page.