Strong Password Generator & Entropy Strength Checker (100% Local)
Create cryptographically secure passwords right inside your browser using hardware randomness (`window.crypto.getRandomValues`). Customize length and character sets, inspect real entropy bits, and copy with one click.
How to Use This Free Tool in Seconds
- Set your desired password length (16+ characters recommended for banking and email accounts).
- Toggle character sets: Uppercase (A-Z), Lowercase (a-z), Numbers (0-9), and Symbols (!@#$%).
- Check the live Entropy Bits score and estimated brute-force crack time.
- Click Copy and save your new password directly inside your password manager.
Frequently Asked Questions
How does this password generator ensure true randomness?
Instead of predictable `Math.random()`, it uses your operating system's cryptographic random number generator (`window.crypto.getRandomValues`) locally in your browser.
What password length is considered safe in 2026?
At least 16 random characters mixing uppercase, lowercase, numbers, and symbols (roughly 95+ bits of entropy), making brute-force cracking mathematically infeasible.
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