What makes a password strong?
Two things: length and randomness. Every extra character
multiplies the number of guesses an attacker needs, which is why a 16-character random
password is astronomically harder to crack than an 8-character "clever" one. And randomness
matters because humans are predictable — names, birthdays, keyboard walks like qwerty123, and word-plus-number patterns like Summer2026! are the
first things cracking software tries.
A password like k7#mQpX2$vLn9wRt has neither problem: it's long, and every
character is chosen by a cryptographic random number generator with no pattern to exploit.
Password length vs. time to crack
Rough offline-attack estimates for random passwords using letters, numbers and symbols (modern GPU hardware, ~10 billion guesses per second):
| Length | Possible combinations | Time to crack |
|---|---|---|
| 8 characters | ~6 × 10¹⁵ | hours to days |
| 12 characters | ~5 × 10²³ | thousands of years |
| 16 characters | ~4 × 10³¹ | billions of years |
| 20 characters | ~4 × 10³⁹ | longer than the universe has existed |
That's why the slider above defaults to 16. Wondering about a password you already use? Test it with our password strength checker.
Three rules that prevent almost every account takeover
- Unique password per account. Reused passwords are how one site's breach becomes your email, bank and social accounts falling in the same week.
- 16+ random characters for anything that matters — generated, not invented.
- Turn on two-factor authentication. Even a stolen password fails without the 6-digit code. DroidPass includes a built-in 2FA authenticator, so codes live next to your logins.
Generated a password? Don't lose it.
Save it in DroidPass — an AES-256 encrypted vault with fingerprint unlock, a built-in 2FA authenticator, and offline access. Free to start.
Password generator FAQ
Is this password generator safe to use?
Yes. Passwords are generated entirely in your browser using the Web Crypto API (crypto.getRandomValues), a cryptographically secure random number generator. Nothing you generate is ever sent to our servers, stored, or logged — you can even load this page and then go offline before generating.
How long should my password be?
At least 16 characters for anything important. Length beats complexity: a 16-character random password with letters, numbers and symbols would take centuries to brute-force, while an 8-character one can fall in hours. For master passwords and email accounts, 20+ characters is a good habit.
Should I use a different password for every account?
Yes — this is the single most important password rule. When one website leaks, attackers immediately try the same email and password everywhere else (credential stuffing). Unique passwords contain the damage to one account. A password manager exists precisely so you never have to remember them.
How do I remember a random password?
You don't. Generate it, then save it in a password manager like DroidPass — your vault is encrypted with AES-256 and unlocks with your fingerprint or Master PIN. The only password you ever memorize is the one that opens your vault.
Keep reading
How strong is my password? Test it →
Why you need a password manager in 2026 →
Offline password manager: access your passwords without internet →