🔐 Password Generator
Create secure, strong passwords with customizable settings. Generate random passwords with uppercase, lowercase, numbers, and symbols. Free online password generator with strength meter.
Why Use a Password Generator?
In today's digital age, strong passwords are your first line of defense against cyber attacks. Weak passwords are one of the leading causes of data breaches, with studies showing that over 80% of hacking-related breaches involve compromised or weak credentials.
Our free password generator creates cryptographically secure random passwords that are virtually impossible to guess. Unlike human-created passwords that often follow predictable patterns, our generator uses true randomness to ensure maximum security for your accounts.
How to Use Our Password Generator
Creating a strong password is simple with our tool. Follow these steps:
- Choose a Preset (Optional): Start with one of our quick presets - Strong, PIN, Memorable, or Maximum - for common use cases.
- Adjust Length: Use the slider to set your desired password length (4-64 characters). Longer passwords are generally more secure.
- Select Character Types: Choose which character sets to include - uppercase letters, lowercase letters, numbers, and symbols.
- Exclude Similar Characters: Optionally exclude confusing characters like 0, O, 1, l, and I to make passwords easier to read.
- Generate Multiple Passwords: Need several passwords? Set the count and generate multiple at once.
- Check Strength: Review the password strength indicator and estimated crack time before using.
- Copy and Use: Copy your password securely and use it immediately. Never share passwords or reuse them across accounts.
Password Security Best Practices
🔒 Use Unique Passwords
Never reuse passwords across different accounts. If one account is compromised, all your other accounts remain safe. Use our generator to create unique passwords for each service.
📏 Longer is Stronger
Password length is more important than complexity. A 16-character password with mixed characters is exponentially stronger than an 8-character password, even with symbols.
🔄 Change Regularly
Update passwords periodically, especially for sensitive accounts like banking, email, and social media. Generate new passwords every 3-6 months for critical accounts.
🔐 Use a Password Manager
Store generated passwords in a reputable password manager. This allows you to use strong, unique passwords without memorizing them all.
✅ Enable Two-Factor Authentication
Even the strongest password benefits from two-factor authentication (2FA). This adds an extra layer of security beyond just the password.
🚫 Avoid Personal Information
Never use names, birthdays, addresses, or other personal information in passwords. These are easily guessable by attackers who know you or can find information about you online.
Key Features of Our Password Generator
True Randomness
Our generator uses cryptographically secure random number generation to ensure passwords are truly unpredictable and cannot be reverse-engineered.
Strength Meter
Real-time password strength analysis helps you understand how secure your generated password is. We also estimate the time it would take to crack your password.
Fully Customizable
Control every aspect of password generation - length, character types, and whether to exclude similar-looking characters for better readability.
Batch Generation
Generate up to 20 passwords at once, perfect for setting up multiple accounts or creating backup passwords. Copy individual passwords or all at once.
Privacy Guaranteed
All password generation happens locally in your browser. We never see, store, or transmit your passwords. Your security is our priority.
Quick Presets
Use our preset configurations for common scenarios - strong passwords, PINs, memorable passwords, or maximum security. One click to get started.
Understanding Password Types
Strong Passwords (20 characters)
Ideal for most online accounts including email, social media, and cloud services. Combines uppercase, lowercase, numbers, and symbols for maximum security while remaining manageable.
Best for: Email accounts, social media, cloud storage, online shopping
PIN Codes (6 digits)
Numeric-only passwords perfect for devices, apps, or services that require short numeric codes. Excludes confusing characters like 0 and 1 for clarity.
Best for: Phone locks, app PINs, two-factor authentication codes
Memorable Passwords (12 characters)
Balanced security and readability. Uses letters and numbers while excluding similar characters, making it easier to read and type when needed.
Best for: Accounts you might need to type manually, WiFi passwords, local device access
Maximum Security (32 characters)
Ultimate security for highly sensitive accounts. Uses all character types at maximum length, providing billions of years of protection against brute force attacks.
Best for: Banking, cryptocurrency wallets, master passwords, enterprise accounts
Understanding Password Security & Attacks
How Passwords Are Cracked
Brute Force Attacks
Attackers systematically try every possible password combination until they find the correct one. The time required depends on password length and character set size. A 4-digit PIN has only 10,000 possible combinations, while a 16-character password with mixed case, numbers, and symbols has trillions of possibilities.
Dictionary Attacks
Attackers use lists of common passwords, words from dictionaries, and previously leaked passwords. This is why "password123" or "qwerty" are extremely weak - they're among the first passwords tried. Our generator creates truly random passwords that won't appear in any dictionary.
Rainbow Table Attacks
Pre-computed tables of password hashes allow attackers to quickly look up common passwords. However, modern systems use "salting" (adding random data) to make rainbow tables ineffective. Strong, unique passwords remain the best defense.
Social Engineering
Attackers may try to trick you into revealing your password through phishing emails, fake websites, or phone calls. Never share your password with anyone, and always verify the authenticity of requests for your credentials.
Password Strength Factors
- Length: Each additional character exponentially increases possible combinations. A 20-character password is vastly stronger than a 10-character one.
- Character Variety: Using uppercase, lowercase, numbers, and symbols increases the character set size, making brute force attacks much harder.
- Randomness: Truly random passwords are unpredictable. Avoid patterns, sequences, or personal information that attackers might guess.
- Uniqueness: Never reuse passwords across different accounts. If one account is compromised, others remain safe.
Understanding Entropy
Entropy measures password unpredictability in bits. Higher entropy means more randomness and security. The formula is: entropy = log₂(character_set_size^password_length).
For example, a 16-character password using 95 possible characters (uppercase, lowercase, numbers, symbols) has approximately 105 bits of entropy. This means an attacker would need to try 2^105 combinations on average to crack it - an astronomically large number.
Crack Time Estimation
Our crack time estimates assume an attacker using specialized hardware capable of approximately 10 billion guesses per second - realistic for sophisticated offline attacks on stolen password databases.
Online attacks (trying passwords on live websites) are much slower due to rate limiting, but offline attacks on stolen hashes can be extremely fast. Always assume your password hash could be stolen and attacked offline, so use strong passwords even for less critical accounts.
Best Practices to Avoid Being Hacked
- Use strong, unique passwords: Generate different passwords for each account using our tool.
- Enable two-factor authentication (2FA): Adds an extra layer of security even if your password is compromised.
- Use a password manager: Securely store and manage all your passwords without having to remember them.
- Be cautious with password reset: Ensure your email and phone accounts are well-protected, as they're often used for password resets.
- Monitor for breaches: Use services like "Have I Been Pwned" to check if your accounts have been compromised.
- Update passwords periodically: Especially for sensitive accounts, change passwords if you suspect any compromise.
- Never share passwords: Legitimate services will never ask for your password via email or phone.
- Check for HTTPS: Always ensure websites use HTTPS (secure connection) before entering passwords.
Common Password Mistakes
- Using personal information (names, birthdays, addresses) that attackers can research
- Creating passwords based on dictionary words or common phrases
- Using simple patterns like "123456" or "qwerty"
- Reusing the same password across multiple accounts
- Writing passwords down in insecure locations
- Sharing passwords with others, even trusted individuals
- Using passwords that are too short (less than 12 characters for important accounts)
Frequently Asked Questions
How secure are the generated passwords?
Our password generator uses cryptographically secure random number generation, ensuring passwords are truly random and unpredictable. The strength meter and crack time estimate help you understand the security level of each generated password.
Are my passwords stored or transmitted?
Absolutely not. All password generation happens entirely in your browser using JavaScript. We never see, store, transmit, or have any access to your generated passwords. Your privacy and security are guaranteed.
What makes a password strong?
A strong password combines length, complexity, and randomness. Longer passwords (16+ characters) with a mix of uppercase, lowercase, numbers, and symbols are exponentially stronger than short, simple passwords. Our generator creates passwords that meet all these criteria.
Should I exclude similar characters?
Excluding similar characters (0, O, 1, l, I) makes passwords easier to read and type, which is helpful when you need to manually enter them. However, it slightly reduces the character set size. For maximum security, keep all characters; for better usability, exclude similar ones.
How many passwords should I generate at once?
Generate as many as you need! Our tool supports generating up to 20 passwords simultaneously. This is useful when setting up multiple accounts, creating backup passwords, or when you need several options to choose from.
What is the estimated crack time based on?
The crack time estimate assumes a modern attacker using specialized hardware capable of approximately 1 billion password guesses per second. This is a realistic estimate for sophisticated attacks, though actual times may vary based on the attacker's resources and methods.
Can I use these passwords for any service?
Yes! Generated passwords work with any service that accepts passwords. However, always check the specific requirements of each service - some may have length limits, character restrictions, or other requirements that you'll need to adjust for.