Password Generator & Strength Checker

The Password Generator & Strength Checker is a security utility designed to generate cryptographically secure random passwords and evaluate their resistance against brute-force attacks. Powered by the native browser `crypto.getRandomValues` API and Dropbox's `zxcvbn` library, it runs entirely client-side. Many users fear that online generators might record generated passwords in database logs for future exploits. This utility does not transmit any inputs or generated values over the internet, providing a completely offline sandbox that guarantees your credentials remain private. [Cryptographic Randomness and Strength Analysis] To ensure high security, this generator bypasses standard JavaScript `Math.random()`, which uses predictable pseudo-random seeds. Instead, it queries the OS kernel via the browser's `window.crypto.getRandomValues` API to compile a sequence of unpredictable characters. Concurrently, the `zxcvbn` analyzer estimates crack times by cross-referencing common passwords, dictionary patterns, repetition sequences, and keyboard spatial layouts, offering a realistic crack time simulation. [Step-by-Step Guide] 1. Configure your password settings (length, uppercase, lowercase, numbers, and special symbols). 2. Click 'Generate Password' to instantly compile a new random password. 3. Review the security score (Weak, Medium, Strong) and estimated crack times displayed below. 4. Click 'Copy' to copy the generated credentials to your clipboard. 5. Paste the password into your target service and back it up in your password manager. [Frequently Asked Questions & Precautions] - Q: How does the tool load the heavy strength analyzer without lagging? - A: To maximize page speeds, the `zxcvbn` library is loaded dynamically in the background (Dynamic Import). The initial page load is lightweight, and the analyzer activates only when the user types or generates a password. - Q: Can I recover a password I generated earlier? - A: No. For absolute security, no generated passwords are saved in the browser or on our servers. Once you close the tab, the password is permanently lost. Please save it immediately.