Strong Password Generator

Create secure, random passwords instantly — free and private

Crypto-secure | 100% client-side
Your Generated Password
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Password Strength

Password Settings

4 32 64 128

Generate Multiple Passwords

Password Tips

  • Use at least 12 characters for general accounts
  • Use 16+ characters for sensitive accounts
  • Mix all character types for maximum security
  • Use a unique password for every account
  • Store passwords in a password manager

Password Stats

  • Length
  • Character Pool
  • Entropy (bits)
  • Combinations

100% Private

Passwords are generated locally in your browser using the Web Crypto API. Nothing is ever sent to any server.

What Makes a Password Strong?

Understanding the key factors that determine password security

A strong password is your first line of defense against unauthorized access to your accounts. Password strength depends on three key factors: length, complexity, and randomness. The longer and more random a password is, the harder it becomes for attackers to crack it through brute-force or dictionary attacks.

Length

Every additional character exponentially increases the number of possible combinations. A 16-character password is roughly 10 billion times harder to crack than an 8-character one with the same character set.

Complexity

Using a mix of uppercase, lowercase, numbers, and symbols expands the character pool from 26 (letters only) to 95+ characters, making each position in the password much harder to guess.

Randomness

Human-chosen passwords often follow predictable patterns. Cryptographically random generation eliminates this bias, ensuring every character is truly unpredictable and resistant to pattern-based attacks.

How Our Password Generator Works

Cryptographically secure random generation in your browser

1

Cryptographically Secure Randomness

We use the Web Crypto API (crypto.getRandomValues()) to generate truly random numbers. Unlike Math.random(), this method is cryptographically secure and suitable for security-sensitive applications like password generation.

2

Character Pool Selection

Based on your settings, we build a character pool from uppercase letters (A-Z), lowercase letters (a-z), numbers (0-9), and symbols (!@#$%^&*). Each character in the password is independently and randomly selected from this pool.

3

Zero Server Contact

The entire generation process happens locally in your browser. No passwords, settings, or any data are ever sent to our servers. You can verify this by disconnecting from the internet — the tool continues to work perfectly.

Password Security Best Practices

Expert recommendations to keep your accounts safe

Do This

  • Use a unique password for every account
  • Use at least 12 characters (16+ for sensitive accounts)
  • Use a password manager to store passwords securely
  • Enable two-factor authentication (2FA) wherever possible
  • Change passwords immediately if a breach is reported

Avoid This

  • Never reuse passwords across multiple accounts
  • Avoid personal info (names, birthdays, pet names)
  • Don't use common patterns (123456, password, qwerty)
  • Don't store passwords in plain text or sticky notes
  • Don't share passwords via email or messaging apps

How Passwords Get Cracked

Understanding the threats helps you choose better protection

Brute-Force Attacks

Attackers try every possible combination. With modern GPUs, short and simple passwords can be cracked in seconds. A 6-character lowercase password has only ~300 million combinations — crackable in under a second. A 16-character mixed password has over 10^31 combinations.

Dictionary Attacks

Attackers use lists of common words, phrases, and previously leaked passwords. "Summer2024!" might look strong but appears in many dictionaries. Randomly generated passwords are immune to dictionary attacks since they don't contain real words.

Credential Stuffing

When a service is breached, attackers try those stolen credentials on other sites. If you reuse passwords, one breach compromises all your accounts. Unique passwords for each account prevent this entirely.

Phishing

Attackers trick you into entering your password on fake websites. While a strong password doesn't prevent phishing, using unique passwords limits the damage to a single account. Always verify URLs and enable 2FA.

Password Length vs. Crack Time

How password length affects the time to crack (brute-force, 10 billion guesses/second)

Length Lowercase Only Mixed Case + Numbers All Character Types
6 chars Instant Instant Instant
8 chars ~5 seconds ~1 hour ~19 hours
10 chars ~1 hour ~6 months ~53 years
12 chars ~3 weeks ~2,000 years ~500K years
16 chars ~600 years ~800B years ~10^15 years

Our recommendation: Use at least 12 characters with all character types for standard accounts, and 16+ characters for email, banking, and cryptocurrency accounts. This puts crack time well beyond practical feasibility.

Frequently Asked Questions

Everything you need to know about our free password generator

Yes. This password generator uses the Web Crypto API (crypto.getRandomValues()) to generate cryptographically secure random numbers directly in your browser. No passwords are ever sent to or stored on any server. The tool works completely offline once the page is loaded. You can verify this by checking your browser's Network tab in Developer Tools.
Humans are predictably bad at creating random passwords. We tend to use dictionary words, personal information, and common patterns that attackers know to check first. A cryptographically random generator eliminates all human bias, creating passwords that are statistically optimal against brute-force and dictionary attacks.
Security experts recommend: 12 characters minimum for general accounts (social media, shopping), 14-16 characters for important accounts (email, cloud storage), and 16-20+ characters for critical accounts (banking, cryptocurrency, master passwords). Each additional character exponentially increases security.
Yes, when possible. Including symbols expands the character pool from ~62 characters (letters + numbers) to ~95 characters, significantly increasing the number of possible combinations. Some websites restrict certain special characters — if a password is rejected, try regenerating without the specific disallowed symbols.
You don't need to! Use a password manager like Bitwarden, 1Password, KeePass, or LastPass to securely store all your passwords. You only need to remember one strong master password. Password managers also auto-fill credentials, making login faster and more secure.
Entropy measures the unpredictability of a password in bits. It's calculated as log2(pool_size^length). Higher entropy means a more secure password. For reference: 40 bits = weak, 60 bits = reasonable, 80 bits = strong, 100+ bits = very strong. A 16-character password with all character types has about 105 bits of entropy.
Yes. Use the "Generate Multiple Passwords" feature below the main generator. You can create up to 50 unique passwords at once, each using your current settings. You can copy them individually or all at once.
Ambiguous characters are those that look similar in many fonts: I (uppercase i), l (lowercase L), 1 (one), O (uppercase o), and 0 (zero). Excluding them is useful when you might need to read or type the password manually. For copy-paste use, keeping them included increases security.