Bcrypt Hash Generator
Generate and inspect bcrypt password hashes locally in your browser.
Updated
What is the Bcrypt Hash Generator?
Bcrypt Hash Generator is a browser-only security tool for creating bcrypt password hashes, inspecting existing hashes, and verifying plaintext passwords against stored bcrypt values.
It is designed for frontend engineers, backend developers, and security-focused teams who need a fast local utility for authentication testing, migration checks, or troubleshooting password hashing flows.
The tool runs entirely in your browser, so password values and hashes stay on your device while you work.
Use it to generate test hashes, confirm a hash format, or quickly check whether a password matches a bcrypt string from a database or API payload.
How it works
Bcrypt stores the algorithm version, cost factor, salt, and hash in one encoded string.
When you generate a hash, the tool uses your password and selected settings to create a bcrypt-formatted result locally in the browser.
When you verify a password, the tool parses the pasted hash, extracts the embedded parameters, and compares the candidate password against that hash structure.
What you can do
- Generate bcrypt hashes with a selectable version.
- Choose a cost factor to control hashing strength and speed.
- Inspect pasted hashes to confirm they follow the expected bcrypt format.
- Verify whether a plaintext password matches a stored bcrypt hash.
- Copy the resulting hash for use in development or testing.
Why the cost factor matters
The cost factor controls how much work bcrypt performs.
Higher values make hashing slower and more resistant to brute-force attacks, but they also take longer to compute in the browser and on your backend.
Why local processing helps
Because everything runs client-side, you can test passwords without uploading sensitive data to a server.
That makes the tool useful for local debugging, private workflows, and quick hash checks during development.
Examples
Generate a bcrypt hash
Create a local bcrypt hash with a chosen version and cost factor for testing authentication flows.
Inspect an existing hash
Parse a pasted bcrypt hash to see its version, cost factor, salt, and digest structure.
Verify a password
Check whether a plaintext password matches a bcrypt hash without sending anything to a server.
Frequently asked questions
Is this bcrypt generator private?
Is this bcrypt generator private?
Yes. The tool is designed to run locally in your browser, so your password and hash inputs do not need to leave your device.
What bcrypt versions are supported?
What bcrypt versions are supported?
The tool supports the common bcrypt prefixes used in production workflows: 2a, 2b, and 2y.
What is the bcrypt cost factor?
What is the bcrypt cost factor?
The cost factor is the work setting inside a bcrypt hash. Higher values increase the time required to compute a hash and can improve resistance to brute-force attacks.
Why is my hash not being accepted?
Why is my hash not being accepted?
A valid bcrypt hash should follow the standard format and include the expected version prefix, cost factor, salt, and digest structure. If the string is malformed or incomplete, the tool will reject it.
Can I use this to verify stored database hashes?
Can I use this to verify stored database hashes?
Yes. Paste the stored bcrypt hash and the plaintext password you want to test, and the tool will compare them locally in your browser.
Should I use this for production password storage?
Should I use this for production password storage?
No. Use the tool for inspection, testing, and development workflows. Production password hashing should happen in your application backend using a proper bcrypt implementation.
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