Security Tools
Password Generator
Generate strong, cryptographically secure passwords. Choose from random passwords, memorable passphrases, pronounceable words, or PINs. Includes strength analysis, entropy calculation, and breach checking.
🔧 Generation Mode
⚙️ Password Settings
🔑 Generated Passwords
Click "Generate Passwords" to create secure passwords
🔍 Password Strength Analyzer
Use a Password Manager
Generate and store unique passwords for every account with Bitwarden, 1Password, or LastPass.
Minimum 16 Characters
Every additional character makes your password exponentially harder to crack.
Never Reuse Passwords
If one site is breached, reused passwords compromise all your other accounts.
Mix All Character Types
Uppercase, lowercase, numbers, and symbols create the strongest passwords.
Password Generator — Create Strong, Unbreakable Passwords
In 2024, the average person has 100+ online accounts — and most people reuse the same weak passwords across multiple sites. A single data breach can compromise every account. Our free password generator creates cryptographically secure passwords that are virtually impossible to crack. With four generation modes (random, passphrase, pronounceable, PIN), a built-in strength analyzer, entropy calculator, and breach checker, you can generate and verify strong passwords with confidence. Everything runs locally in your browser — no passwords are ever transmitted or stored.
Password Strength: How Long to Crack?
| Password Type | Example | Length | Time to Crack | Strength |
|---|---|---|---|---|
| Common word | password | 8 chars | Instantly | ❌ Very Weak |
| Word + number | password123 | 11 chars | < 1 second | ❌ Very Weak |
| Mixed case | Password123 | 11 chars | 2 minutes | ⚠️ Weak |
| Random chars | K9#mR2!x | 9 chars | 5 days | ⚠️ Fair |
| Random chars | K9#mR2!xP5$ | 12 chars | 3 years | ✅ Strong |
| Random chars | K9#mR2!xP5$vL8@w | 16 chars | 2 billion years | 🟢 Very Strong |
| Passphrase | correct-horse-battery-staple | 28 chars | Never (effectively) | 🟢 Military Grade |
4 Password Generation Modes
| Mode | Best For | Security Level | Memorability |
|---|---|---|---|
| 🎲 Random | Password manager, maximum security | ★★★★★ | ★★☆☆☆ |
| 📝 Passphrase | Master passwords, WiFi, sharing verbally | ★★★★☆ | ★★★★★ |
| 🗣️ Pronounceable | Computer login, frequent typing | ★★★☆☆ | ★★★★☆ |
| 🔢 PIN Code | Phone lock, ATM, door codes | ★★☆☆☆ | ★★★★★ |
Frequently Asked Questions
A strong password has four key characteristics: (1) Length — at least 12-16 characters (longer is exponentially more secure), (2) Complexity — includes uppercase letters, lowercase letters, numbers, and special symbols, (3) Randomness — no dictionary words, names, dates, or patterns like "12345" or "qwerty", (4) Uniqueness — never reused across multiple accounts. Our password generator creates truly random passwords that meet all these criteria. For example, "K9#mR2!xP5$vL8@w" is infinitely stronger than "Password123!" because it's longer, more random, and contains no predictable patterns.
Our password strength analyzer evaluates your password based on multiple factors: Length (longer = stronger), Character variety (uppercase, lowercase, numbers, symbols), Entropy (mathematical measure of randomness), Pattern detection (identifies common patterns, keyboard walks, repeated characters), Dictionary check (flags common words and passwords), and Breach check (verifies against known compromised passwords). Each factor contributes to an overall score from 0-100, with color-coded feedback: Red (0-25: Very Weak), Orange (26-50: Weak), Yellow (51-70: Fair), Light Green (71-85: Strong), Green (86-100: Very Strong).
Pronounceable passwords use alternating consonants and vowels to create "word-like" strings that are easy to remember but still random. Examples: "Mupolaki", "Tevonasu", "Rixamepo". They offer a middle ground between security and memorability. Use them for: Passwords you need to type frequently (like computer login), Accounts where you can't use a password manager, WiFi network passwords you share verbally, and Temporary passwords for new users. While less secure than fully random passwords of the same length, a 16-character pronounceable password is still very strong.
A passphrase is a sequence of random words strung together, like "correct-horse-battery-staple". Passphrases are: (1) Easier to remember than random characters, (2) Very secure due to their length (a 4-word passphrase has billions of possible combinations), (3) Resistant to brute-force attacks because of their length, (4) Easy to type on mobile devices. A 5-word passphrase like "purple-elephant-sunset-coffee-river" is virtually uncrackable. Our passphrase generator uses a dictionary of 10,000+ common words with customizable separators (hyphens, spaces, dots).
Our tool integrates with the "Have I Been Pwned" (HIBP) API to check if your password has appeared in known data breaches. This service maintains a database of over 1 billion compromised passwords from major breaches (Adobe, LinkedIn, MySpace, etc.). Your password is never sent in full — we use k-anonymity (sending only the first 5 characters of the SHA-1 hash) to check securely. If your password has been breached, change it immediately on all accounts where you've used it.
Here's a guide based on current cracking speeds: 8 characters — cracked instantly (weak), 10 characters — cracked in hours (minimal), 12 characters — cracked in months (acceptable minimum), 14 characters — cracked in decades (strong), 16+ characters — cracked in centuries (very strong), 20+ characters — effectively uncrackable. We recommend: Minimum 12 characters for general accounts, 16+ characters for email and financial accounts, 20+ character passphrases for master passwords (password manager, computer login). Every additional character multiplies the cracking time by ~72 (using all character types).
Special characters (!@#$%^&*) significantly increase password strength by expanding the character set from 62 (letters + numbers) to 95 possible characters per position. For a 12-character password: Without specials: 62^12 = 3.2 × 10^21 combinations. With specials: 95^12 = 5.4 × 10^23 combinations (170x more). However, some websites restrict special characters. Our generator lets you toggle which character sets to include. If a site doesn't accept special characters, compensate with extra length — a 16-character alphanumeric password is stronger than a 12-character password with specials.
Password entropy measures the randomness (unpredictability) of a password in bits. Higher entropy = stronger password. Formula: Entropy = log2(character_set_size^length). Examples: "password" (8 chars, lowercase only) = ~38 bits (very weak), "P@ssw0rd" (8 chars, mixed) = ~52 bits (weak), "K9#mR2!xP5$" (12 chars, all types) = ~78 bits (strong), 5-word passphrase = ~65 bits (strong). We display entropy with each generated password. Aim for: 60+ bits (good), 80+ bits (strong), 100+ bits (very strong), 128+ bits (military-grade).
Yes! All password generation happens locally in your browser using JavaScript's cryptographically secure random number generator (crypto.getRandomValues). No passwords are ever sent to any server. The breach check feature requires internet access (to query the HIBP API), but the password generation itself works completely offline. Your generated passwords are never stored, logged, or transmitted. For maximum security, you can disconnect the internet after the page loads and generate passwords completely offline.
The best solution is a password manager (like Bitwarden, 1Password, or LastPass). Password managers: Generate and store strong unique passwords for every account, Auto-fill passwords on websites and apps, Sync across all your devices, Require you to remember only ONE master password. If you can't use a password manager: Use passphrases for accounts you type manually, Use pronounceable passwords for frequently-typed accounts, Write down passwords and store them in a secure physical location (like a safe), NEVER reuse passwords across important accounts.
The top password mistakes that lead to compromised accounts: (1) Using personal information — names, birthdays, pet names (easily guessed or found on social media), (2) Reusing passwords — if one site is breached, all accounts with that password are at risk, (3) Using common words — "password", "admin", "letmein" are tried first in attacks, (4) Short passwords — anything under 10 characters is crackable quickly, (5) Keyboard patterns — "qwerty", "asdfgh", "1qaz2wsx" are well-known, (6) Not changing default passwords — routers, IoT devices often come with default passwords like "admin/admin", (7) Storing passwords in plain text — never in email, notes apps, or spreadsheets.
Current NIST (National Institute of Standards and Technology) guidelines recommend: Change passwords ONLY when there's evidence of compromise (breach notification, suspicious activity), Do NOT force periodic password changes (every 90 days) — this leads to weaker passwords as users make small, predictable changes, Use multi-factor authentication (MFA) instead of frequent changes, Use unique passwords for every account (a password manager helps), Monitor accounts for breaches using services like Have I Been Pwned. The old advice of "change every 90 days" is outdated and counterproductive.