How to Use
- Paste the password you want to protect, such as an admin seed password or a test account password.
- Adjust Cost/Rounds. The default is practical for browser testing; use a lower value for quick checks.
- Click "Generate Bcrypt Hash" and copy the result into your backend config, fixtures, or seed script.
- Paste a password and Bcrypt hash into the checker, then verify whether they match.
Core Features
- Generate Bcrypt hashes and verify passwords in one compact workflow
- Process passwords and hashes locally in the browser without uploads
- Adjust Cost/Rounds from 4 to 12 to test different work factors
- Copy generated hashes and reuse them immediately in the checker
- Treat Bcrypt correctly as a one-way password hash, not decryptable text
Related Tools
The 2026 FIRE Calculator (Inflation Adjusted). Simulate real purchasing power, analyze retirement savings gaps, and generate a visual wealth roadmap. One-click CSV export for your Excel or Notion finance dashboard. 100% Private, client-side calculation.
Calculate trade position size from account balance, risk %, entry, and stop loss. Runs locally in your browser with no uploads, so you can compare risk scenarios before you trade.
Calculate compound interest from principal, recurring contributions, APY, and time. Visualize principal, interest, and final balance with a local interactive chart.
Use this Loan Calculator / Mortgage Calculator to estimate monthly payment, total interest, and an amortization schedule locally. Enter amount, rate, and term to calculate now with instant charts.
Use this Investment Calculator / ROI Calculator to estimate starting capital, monthly contributions, annual return, and inflation-adjusted results locally. Calculate projected returns with an instant compound interest chart, ROI, and yearly schedule.
Use this APR to APY Calculator to convert between APR and APY locally. Enter a rate, choose compounding frequency, and see the effective interest rate, spread, and frequency comparison instantly.
Use this Profit Margin Calculator to calculate gross profit, Markup, Margin, and selling price locally. Enter cost and price, or cost and target margin, then calculate your margins instantly.
Use this CPM Calculator and CPC Calculator to estimate ad spend, impressions, clicks, CPM, CPC, and CTR locally. Enter budget and target costs to plan campaign scenarios instantly.
Calculation Logic
Bcrypt adds a random salt to every generated hash and stores the version, Cost/Rounds, and salt inside the final string. That is why the same password can produce different hashes while still verifying successfully.
Unlike plain MD5/SHA text hashes, Bcrypt uses a work factor to make each password guess more expensive. Verification does not decrypt the hash. It reads the stored parameters, recomputes the password hash, and compares the result.
This tool uses a pure JavaScript Bcrypt implementation and caps the browser Cost at 12. Higher costs are slower and should be evaluated in your backend runtime rather than blocking a browser tab.
FAQ
Can a Bcrypt hash be decrypted?
No. Bcrypt is a one-way password hashing algorithm. It can generate and verify hashes, but it cannot recover the original password.
What is the Cost or Rounds factor?
Cost/Rounds is Bcrypt's work factor. Higher values make generation and verification slower, which also raises the cost of bulk password guessing. This browser tool limits the range to 4 through 12.
Why does the same password create different hashes?
Bcrypt generates a new random salt each time. Different hashes can still verify against the same password.
Are passwords sent to a server?
No. Generation and verification run in your current browser session.