Password Generator
Generate cryptographically secure random passwords with customizable length and character options. All passwords are generated locally in your browser — nothing is sent to any server.
Estimated crack time (10B guesses/sec): -
A B C D E F ... Z
a b c d e f ... z
0 1 2 3 4 5 6 7 8 9
! @ # $ % ^ & * ( ) _ + ...
Remove 0 O I l 1 | (easy to confuse)
| Length | Entropy (all types) | Crack Time (10B/sec) | Rating |
|---|---|---|---|
| 8 | 52 bits | ~7 minutes | Weak |
| 12 | 79 bits | ~19,000 years | Fair |
| 16 | 105 bits | ~1.3 billion years | Strong |
| 20 | 131 bits | ~8.6 × 10¹⁹ years | Very Strong |
Complete Guide to Password Security
Why Strong Passwords Matter
In 2024, over 80% of data breaches involved weak or stolen passwords (Verizon DBIR). A strong, unique password for each account is your primary defense against unauthorized access. Password reuse across sites means a single breach can compromise all your accounts.
What Makes a Password Strong?
Length (Most Important)
Each additional character exponentially increases cracking difficulty. A 16-character password is ~10 million times harder to crack than an 8-character one.
Character Variety
Using uppercase, lowercase, numbers, AND symbols increases the charset from 26 to 94+ characters, making brute-force attacks exponentially harder.
Randomness
Human-chosen passwords follow predictable patterns. Machine-generated random passwords eliminate these patterns entirely.
Uniqueness
Never reuse passwords. If one site is breached, attackers will try that password on every other service (credential stuffing).
How Passwords Are Cracked
Attackers use several methods to crack passwords:
- Brute Force: Trying every possible combination. Modern GPUs can attempt 10+ billion passwords per second against common hash algorithms.
- Dictionary Attack: Using lists of common passwords and words. "password123" and "qwerty" are cracked instantly.
- Rainbow Tables: Precomputed hash tables that can reverse-engineer common passwords instantly.
- Credential Stuffing: Using stolen username/password pairs from one breach to access other sites.
Password Best Practices
- Use a password manager (1Password, Bitwarden, KeePass) to store unique passwords for every account
- Generate passwords of at least 16 characters with all character types
- Enable two-factor authentication (2FA) wherever possible
- Never share passwords via email or messaging
- Change passwords immediately if a service reports a data breach
Frequently Asked Questions
Is this password generator safe to use?
Yes. Passwords are generated entirely in your browser using the Web Crypto API (crypto.getRandomValues). No passwords are ever transmitted to our servers or stored anywhere.
How long should my password be?
We recommend at least 16 characters for important accounts. For critical accounts (banking, email), use 20+ characters. With a password manager, length costs you nothing.
Are passphrases better than random passwords?
A 4-word passphrase (e.g., "correct-horse-battery-staple") has ~44 bits of entropy. A 16-character random password has ~105 bits. Random passwords are stronger per character, but passphrases are easier to remember. Both are valid — the key is sufficient length.