Password Strength Checker
Check how strong your password is. Everything runs 100% client-side — your password never leaves your browser and is never sent to any server.
Estimated time to crack
📊 Analysis
✅ Requirements Check
🔒 This tool runs entirely in your browser. Your password is never transmitted, stored, or logged. View the source code to verify.
FAQ
Is it safe to type my real password here?
Yes. This tool runs 100% client-side in your browser using JavaScript. Your password is never sent to any server, API, or third party. You can verify this by viewing the page source or checking network requests in your browser's developer tools.
How is crack time estimated?
We calculate entropy (randomness) based on character set size and length, then estimate how long a brute-force attack would take at 10 billion guesses per second (modern GPU capability). Pattern-based passwords reduce effective entropy significantly.
What makes a strong password?
Length is the most important factor. A 16-character passphrase is far stronger than an 8-character complex password. Use a mix of characters, avoid dictionary words and common patterns, and never reuse passwords across accounts.