Random Password Generator
Online strong random password generator with customizable length and character set, plus real-time strength estimation.
How to Use & FAQ
Random Password Generator
Online strong random password generator with customizable length and character set, plus real-time strength estimation.
How to Use
- Set the lengthUse the slider to choose the length; 12-16+ is recommended.
- Choose a character setEnable uppercase, lowercase, digits and symbols; exclude ambiguous characters for manual entry.
- Set the countGenerate several at once when creating multiple accounts.
- Click "Generate password"Check the strength estimate and copy; passwords are generated only locally.
- Save to a password managerCopy and save to a manager promptly; avoid leaving it in plaintext — it is cleared on close.
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FAQ
Are the generated passwords secure?
They use the browser’s cryptographically secure randomness (crypto.getRandomValues) — not predictable pseudo-randomness — and everything happens locally. Every character comes from a uniform random source, avoiding weak patterns like a dictionary word with substitutions.
How long should a secure password be?
At least 12-16 characters is recommended; 12 resists online brute-force, but against offline cracking (trying hashes) longer is better, with 16+ safer. This tool shows an estimated entropy to help judge strength.
Will the password be uploaded or logged?
No. Passwords are generated and displayed only locally, never uploaded or saved; they disappear when you close the page, so copy them to a password manager promptly.
How should I store the generated passwords?
Use a password manager rather than plain text, screenshots, or insecure paste targets. Use a different password per site and let the manager remember them.
How should I choose symbols and ambiguous characters?
Symbols notably raise entropy but some legacy systems reject certain symbols; enable "exclude ambiguous characters" to avoid confusing 0/O, 1/l, 5/S when typing by hand — useful for 2FA codes or ticket fields.
How is the strength estimate computed?
It estimates entropy (bits) from the character-set size and password length: entropy ≈ length × log2(character kinds). Higher entropy means more attempts to brute-force, i.e. stronger. Note: this measures randomness, not whether it was leaked.
Is a passphrase better than a password?
Both have merits. A few random memorable words (e.g. 4-5 words) is often longer, easier to remember and entropic enough; fully random short passwords suit auto-fill. The key is to avoid guessable info like your birthday or name.
Should I change passwords regularly?
If nothing leaked, you need not change it often. More effective: a unique strong password per site via a manager, enable 2FA, and rotate the affected account after a breach. Forcing a 90-day change often leads to weak passwords.