Secure Password Generator
Generate cryptographically secure passwords with customizable length, character sets, and multiple generation modes. 100% browser-based – your passwords never leave your device.
Password Generator Tool
Key Features
- Cryptographically Secure – Uses crypto-secure random generation
- Custom Length – Generate passwords up to 128 characters
- Character Set Selection – Choose uppercase, lowercase, numbers, symbols
- Pronounceable Passwords – Easier to remember passwords
- Passphrase Generation – Multi-word passwords (Diceware method)
- Bulk Generation – Generate multiple passwords at once
- Exclude Similar Characters – Avoid 0/O, 1/l/I confusion
- Password Strength Indicator – Real-time strength display
- Copy to Clipboard – One-click copy
- No Server Storage – Generated entirely in browser
Password Types
Random Password
Length: 16 characters
Charset: All types
Example: xK9#mP2$vL7&qR3*
Strength: Very Strong
Use for: Important accounts, password managers
Passphrase (Diceware)
Words: 4-6 random words
Separator: Hyphen or space
Example: correct-horse-battery-staple-92
Strength: Very Strong (if 4+ words)
Use for: Master passwords, memorable but secure
Password Strength by Length
Understanding how password length affects security across different character sets (average case, half keyspace)
Lowercase only (26 characters: a-z)
| Length | Crack Time |
|---|---|
| 8 chars | 0.66 seconds |
| 10 chars | 7.39 minutes |
| 12 chars | 3.47 days |
| 16 chars | 4,343 years |
Upper + Lowercase (52 characters: A-Z, a-z)
| Length | Crack Time |
|---|---|
| 8 chars | 2.82 minutes |
| 10 chars | 5.25 days |
| 12 chars | 38.9 years |
| 16 chars | 1.98 billion years |
Alphanumeric (62 characters: A-Z, a-z, 0-9)
| Length | Crack Time |
|---|---|
| 8 chars | 11.5 minutes |
| 10 chars | 1.76 days |
| 12 chars | 3.25 years |
| 16 chars | 5.82 billion years |
Printable ASCII (95 characters: letters, numbers, symbols)
| Length | Crack Time |
|---|---|
| 8 chars | 5.83 hours |
| 10 chars | 6.02 years |
| 12 chars | 54,500 years |
| 16 chars | 4.44 trillion years |
✅ Recommendation: Minimum 12 characters with alphanumeric or full ASCII for important accounts
Security Best Practices
✅ DO
- Use crypto-secure random –
crypto.getRandomValues(),secretsmodule - Make it long – Minimum 12 characters, prefer 16+
- Use all character types – Upper, lower, numbers, symbols
- Generate in browser – No server-side generation
- Use password manager – Store securely
- Unique for each account – Never reuse passwords
❌ DON’T
- Use Math.random() – Not crypto-secure
- Use personal information – Names, birthdays, etc.
- Use common patterns – 123, abc, qwerty
- Reuse passwords – Each account needs unique password
- Share passwords – Use password sharing features instead
- Store in plain text – Use password manager or encrypted storage
Frequently Asked Questions
How long should my password be?
Minimum: 12 characters
Recommended: 16 characters
High-security: 20+ characters
Length is the #1 factor in password strength.
Should I use all character types?
Yes! Using uppercase, lowercase, numbers, and symbols dramatically increases the possible combinations.
8 chars, lowercase only: 200 billion combinations
8 chars, all types: 6 quadrillion combinations (30,000x stronger)What’s better: long password or complex password?
Length wins!
"xK9#mP2$" (8 chars, complex) < "correct-horse-battery-staple" (28 chars, simple)
8 chars: ~6 hours to crack (avg)
28 chars: Trillions of years to crackShould I change my passwords regularly?
Modern guidance: No, unless:
- Detected in breach
- Shared with someone
- Suspicious activity
Regular forced changes lead to weaker passwords.
Is it safe to use online password generators?
Prefer client-side generation (browser-based) where password never leaves your device. Our tool generates entirely in your browser for maximum security.
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