Bulk Generator
What Makes a Strong Password?
A strong password must be both long and unpredictable. Length is the single most important factor — every additional character exponentially increases the number of guesses required to crack it. A 12-character password has billions of times more combinations than an 8-character one.
- At least 16 characters for standard accounts; 24+ for critical systems.
- Mix of uppercase letters, lowercase letters, digits, and symbols.
- No dictionary words, names, dates, or predictable substitutions (e.g.
p@ssw0rd). - Unique per site — never reused across different accounts.
How Are Passwords Generated?
This tool uses crypto.getRandomValues() — the Web Cryptography API — to generate passwords. This is a cryptographically secure pseudo-random number generator (CSPRNG), the same class of randomness used by password managers and security software. It is fundamentally different from Math.random(), which is not suitable for security purposes. Rejection sampling ensures every character has a perfectly uniform probability of being selected.
Password Security Best Practices
- Store generated passwords in a reputable password manager (Bitwarden, 1Password, etc.).
- Enable two-factor authentication (2FA) on all accounts that support it.
- Change passwords immediately if a service you use is involved in a data breach.
- Never share passwords via email, SMS, or chat — use a secure sharing feature in your password manager.
- Avoid storing passwords in browser autofill if you use shared or public computers.
Frequently Asked Questions
Are the generated passwords stored anywhere?
No. Passwords are generated entirely in your browser using the Web Cryptography API. Nothing is stored, logged, or transmitted. They exist only in your browser's memory until you copy or close the page.
How long should my password be?
For most accounts, 16 characters is sufficient. For high-value accounts (banking, email, work systems), use 24 characters or more. The longer, the better — use a password manager so you never have to remember it.
Can I generate multiple passwords at once?
Yes. Use the bulk mode to generate up to 50 passwords simultaneously with your chosen settings. Copy them all to clipboard or download as a text file.
Is it safe to generate passwords in a browser?
Yes, when using a CSPRNG like crypto.getRandomValues(). Browser-based generation is safe as long as you trust your device and browser extensions. Disable browser extensions on this page if you are concerned.