Password Generator: Create Secure, Strong Passwords (2026)

Passwords are your first line of defense. Weak, reused, or guessable passwords give attackers the keys to your accounts—email, banking, social media, everything.

Yet creating truly secure passwords manually? Nearly impossible. Humans struggle with randomness. We use dictionary words. We follow predictable patterns.

Our Password Generator creates cryptographically secure, random passwords instantly—so your accounts stay protected without requiring you to memorize or generate complex strings.

Why Random Passwords Matter

The Human Predictability Problem

When humans create passwords, we follow predictable patterns:

❌ Common Patterns:

Summer2025!   (Season + Year + Symbol)
P@ssw0rd123   (Dictionary word + Substitutions)
JohnDoe123     (Personal info + Numbers)

Why These Are Dangerous:

• Dictionary Attacks: Attackers use word lists with pattern variations
• Personal Info Research: Attackers find your name, birthdate from social media
• Pattern Recognition: Tools detect “Word + Year + Symbol” patterns

The Random Password Solution

Secure passwords must be:

• Random: No predictable patterns, no dictionary words
• Long: Minimum 16 characters (64 bits of entropy)
• Complex: Mix of uppercase, lowercase, numbers, symbols
• Unique: Different for every account (never reuse)

✅ Example Secure Password:

Kx9#mP2$vL8@qR5n

Our Password Generator creates passwords exactly like this—impossible for humans to generate but effortless for computers.

Cryptographic Security: Why It Matters

The Math.random() Danger

You’ve seen tutorials like this:

// ❌ DON'T DO THIS
function generatePassword() {
  const chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%';
  let password = '';
  for (let i = 0; i < 16; i++) {
    password += chars[Math.floor(Math.random() * chars.length)];
  }
  return password;
}

Why This Is Dangerous:

• Not Cryptographically Secure: Math.random() has low entropy in many browsers
• Predictable: With enough outputs, attackers can predict next values
• Seed-Based: Some implementations are seeded with time (even more predictable)

The crypto.getRandomValues() Solution

Modern browsers provide a cryptographically secure API:

// ✅ DO THIS
const array = new Uint32Array(8);
crypto.getRandomValues(array);
// Convert to password using allowed characters

Why This Is Secure:

• CSPRNG: Cryptographically Secure Pseudo-Random Number Generator
• High Entropy: Outputs unpredictable even after billions of generations
• Hardware-Backed: Uses hardware random number generation where available (Intel RDRAND, ARM RNDRAND)
• FIPS Compliant: Approved for security applications

Our Password Generator uses crypto.getRandomValues() exclusively—ensuring every password is cryptographically strong.

Understanding Password Strength

Entropy: Measuring Unpredictability

Password strength is measured in entropy (bits of randomness):

Password Type	Entropy	Security Level
Summer2025!	~40 bits	Weak (crackable in hours)
P@ssw0rd	~30 bits	Very weak (instant crack)
JohnDoe	~20 bits	Extremely weak
Our 16-char random	~94 bits	Strong (takes billions of years)

How Entropy Calculates: Each possible character adds entropy:

• Lowercase only (26): Log₂(26) = 4.7 bits/char
• Mixed case (52): Log₂(52) = 5.7 bits/char
• Mixed case + numbers (62): Log₂(62) = 5.95 bits/char
• All types (94): Log₂(94) = 6.55 bits/char

16 characters × 6.55 bits = 104.8 bits total

Our Password Generator calculates strength based on entropy—showing you “Weak”, “Medium”, “Strong”, or “Very Strong” instantly.

Why 16 Characters is Recommended

Brute Force Attack Time:

• 8 chars (mixed): Minutes to hours
• 12 chars (mixed): Years to decades
• 16 chars (mixed): Millions of years
• 20 chars (mixed): Billions of years

Practical Advice: 16 characters provides excellent security while remaining typeable. Longer passwords (20+) offer diminishing returns for usability.

Password Generator Features Explained

1. Length Selection (8-64 characters)

Shorter Passwords (8-12):

• ✅ Pro: Easier to type, easier to memorize
• ❌ Con: Less secure, brute-forcable with powerful hardware

Longer Passwords (16-24):

• ✅ Pro: Excellent security, future-proof against quantum
• ❌ Con: Harder to type, impossible to memorize (use password manager)

Very Long Passwords (32-64):

• ✅ Pro: Maximum security
• ❌ Con: Extremely hard to type, only for password vaults

Our Password Generator lets you choose based on your use case: shorter for memorized passwords, longer for password manager storage.

2. Character Type Options

Uppercase (A-Z):

• Adds 26 possibilities per character
• Standard requirement for strong passwords

Lowercase (a-z):

• Adds 26 possibilities per character
• Base requirement for readability

Numbers (0-9):

• Adds 10 possibilities per character
• Prevents dictionary-only attacks

Symbols (!@#$%^&*):

• Adds 32+ possibilities per character
• Crucial for maximum entropy

Exclude Similar Characters:

• Removes: 1, l, I, O, 0
• ✅ Pro: Easier to read, less user error when typing
• ❌ Con: Slightly reduces entropy (negligible for 16+ chars)

Our Password Generator supports all options—customize based on your requirements.

3. Bulk Generation (1-10 passwords)

Why Generate Multiple?

• Account Security: Different password for every account
• Backup Passwords: Keep generated passwords offline
• Team Onboarding: Generate passwords for 10 new team members

Our Password Generator creates 1-10 passwords at once with one click.

Password Managers: Essential for Strong Passwords

The Memorization Myth

Wrong: “I use a strong password like Kx9#mP2$vL8@qR5n for every account.”

Right: “I use a strong password like Kx9#mP2$vL8@qR5n for my password manager, and it generates unique, random passwords for every account.”

Why:

• Humans can’t memorize 50+ 16-character random passwords
• Password Reuse defeats all security—if one account is breached, all are
• Password managers (Bitwarden, 1Password, LastPass) handle storage and autofill

Our Tool + Password Manager Workflow

1. Generate Passwords: Use our Password Generator
2. Save to Vault: Copy each generated password to your password manager
3. Use Random Passwords: Let manager autofill (never type manually)
4. Rotate Regularly: Every 90-180 days, generate new passwords

This combination gives you maximum security without memorization burden.

Common Password Mistakes

1. Using Dictionary Words

Wrong: CorrectHorseBatteryStaple

Right: Kx9#mP2$vL8@qR5n (our Password Generator)

Why: Dictionary attacks use millions of common words. Random characters are not in any dictionary.

2. Personal Information

Wrong: JohnDoe1990! (name + birth year)

Right: Random password (our Password Generator)

Why: Attackers find your personal info from social media and guess variations.

3. Reusing Passwords

Wrong: Same password for email, banking, social media

Right: Unique random password for every account (our Password Generator creates them)

Why: If one site is breached (LinkedIn 2012, Facebook 2021), all your accounts with same password are compromised.

4. Incremental Passwords

Wrong: Password1, Password2, Password3

Right: Random passwords (our Password Generator)

Why: Predictable patterns. Attackers try PasswordN variations automatically.

Security Beyond Strong Passwords

1. Enable 2FA (Two-Factor Authentication)

Even with strong passwords, accounts can be breached (phishing, database leaks). 2FA adds:

• Something you know: Password
• Something you have: Phone authenticator app, security key

Use 2FA wherever available—especially for email, banking, and social media.

2. Never Share Passwords

No Exceptions: Even with IT support, family, or friends. Legitimate support never asks for your password.

If “Support” Asks for Password:

• It’s phishing (scam) - Delete email, block sender
• They’re trying to steal your credentials

3. Check Breach Notifications

Use services like:

• Have I Been Pwned: Check if your email is in known breaches
• Firefox Monitor: Built-in breach checking
• Chrome Password Check: Warns if reused passwords are breached

If a password is breached, immediately:

1. Change it (use our Password Generator)
2. Change other accounts with same password
3. Check for unauthorized activity

Cross-Tool Security Workflow

Password security is part of a broader security toolkit:

• Password Generator → Create strong, random passwords
• Hash Generator → Verify password hashes (SHA-256)
• HMAC Generator → Generate secure keys for encryption
• Text Encryption → Encrypt sensitive data
• Hash Generator → Create password manager master file hashes

These tools work together to protect your digital life.

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Frequently Asked Questions

Q: How do I generate a secure password?

A: Use our Password Generator and select: 1) Length of 16+ characters, 2) All character types (uppercase, lowercase, numbers, symbols). Click “Generate New Passwords” to create cryptographically secure passwords using crypto.getRandomValues(). Copy to password manager—never memorize.

Q: What password length should I use?

A: Minimum 12 characters, ideally 16 characters or longer. Our Password Generator supports 8-64 characters. 16 characters provides 94+ bits of entropy, which takes billions of years to brute-force. Use password manager for 16+ char passwords (impossible to memorize).

Q: Why is excluding similar characters recommended?

A: Similar characters like 1, l, I, O, 0 are confusing when typing (is that a one or lowercase L?). Our Password Generator can exclude these characters to reduce user error. The entropy reduction is negligible for 16+ character passwords.

Q: Can I generate multiple passwords at once?

A: Yes! Our Password Generator supports generating 1-10 passwords simultaneously with one click. This is perfect for onboarding new team members, securing multiple accounts, or creating backup passwords. Choose count from the slider.

Q: How is password strength calculated?

A: Password strength is based on entropy (randomness), measured in bits. Our Password Generator calculates entropy from length and character variety: longer passwords and more character types (uppercase, lowercase, numbers, symbols) = higher strength (94+ bits = Very Strong).

Q: Should I memorize strong passwords?

A: No! Humans cannot memorize 50+ unique, 16-character random passwords. Use a password manager (Bitwarden, 1Password, LastPass) to store passwords. Generate with our Password Generator, save to vault, let manager autofill. Never memorize random passwords.

Q: Why is Math.random() insecure for passwords?

A: Math.random() is not cryptographically secure. Browser implementations vary, some have low entropy, and values can be predicted with enough captured outputs. Our Password Generator uses crypto.getRandomValues(), a CSPRNG backed by hardware random number generation, ensuring unpredictability.

Q: Can I use this password generator offline?

A: Yes! Our Password Generator runs entirely in your browser using the Web Crypto API. Once loaded, it requires no internet connection. Your passwords are generated locally—never transmitted to any server for maximum privacy.

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Start Generating Secure Passwords Today

Whether you’re securing new accounts, rotating old passwords, or onboarding a team, strong, random passwords are essential.

Our Password Generator is:

• Cryptographically Secure: Uses crypto.getRandomValues() API
• Instantly Generated: Create 1-10 passwords at once
• Highly Customizable: Length (8-64), character types, similar character exclusion
• Privacy-First: Generated locally, never transmitted

Try it now:

• Generate 16-Char Password - Recommended security
• Generate Multiple Passwords - Team onboarding
• Exclude Similar Characters - Reduce typing errors
• Generate Strongest Passwords - 64 characters

Instant security. Random generation. Never memorize again.

Explore all 21 free tools at Hasare.

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Still using “Summer2025!” as password? Generate secure, random passwords with our Password Generator and use a password manager. Your accounts deserve better protection.