Password Generator
Generate strong, random passwords with length and character controls and a strength meter.
Secure Password Generator - Cryptographically Random Passwords
Generate strong, unique passwords using your browser's cryptographically secure random number generator. Choose your desired length, character types, and complexity requirements, then copy the result. Passwords are generated locally and never transmitted or stored anywhere - not even temporarily.
Why Strong Passwords Matter
Weak passwords remain the most common cause of account compromises. Attackers use automated tools that can test billions of password combinations per second. A short or predictable password (common words, dates, patterns like "123456") can be cracked in seconds. A truly random 16-character password with mixed character types would take billions of years to crack with current technology.
Password reuse amplifies the risk. When one service is breached, attackers try those credentials on every other service. Using a unique random password for each account means a breach of one service does not compromise your other accounts.
How This Generator Works
This tool uses the Web Crypto API (crypto.getRandomValues), which provides cryptographically secure random numbers. Unlike Math.random() which is predictable, the Web Crypto API draws from your operating system's entropy pool, producing randomness suitable for security-critical applications like password generation.
You select which character categories to include: uppercase letters (A-Z), lowercase letters (a-z), numbers (0-9), and special symbols. The generator ensures at least one character from each selected category appears in the result, then fills remaining positions with uniformly random characters from all selected categories.
Password Strength Guidelines
For maximum security, use at least 16 characters with all four character types (upper, lower, numbers, symbols). This provides approximately 100 bits of entropy - far beyond what any brute-force attack can feasibly crack. For less critical accounts, 12 characters with mixed types provides strong protection.
Some services restrict which special characters are allowed or impose maximum lengths. If a generated password is rejected, reduce the length or try without special characters. Most modern services accept 16+ character passwords with full symbol sets.
Password Management Tips
Use a password manager (like Bitwarden, 1Password, or KeePass) to store your generated passwords. Memorizing dozens of unique random passwords is impractical - a password manager lets you use maximum-strength unique passwords everywhere while only memorizing one master password.
Enable two-factor authentication (2FA) wherever available, even with strong passwords. 2FA provides an additional security layer that protects your account even if the password is somehow compromised through phishing or a service breach.
Frequently Asked Questions
Is this generator truly random? Yes. It uses the Web Crypto API which provides cryptographically secure randomness from your operating system's entropy pool. The output is unpredictable and suitable for security-critical applications.
Are my generated passwords stored anywhere? No. Passwords exist only in your browser's memory while displayed on screen. They are not logged, transmitted, or saved. Once you navigate away, the password exists only where you copied it.
How long should my password be? 16 characters is the recommended minimum for important accounts. 12 characters is acceptable for less critical accounts. Every additional character exponentially increases the difficulty of brute-force attacks.
Should I include special characters? When the service allows it, yes. Special characters significantly increase the number of possible combinations per character position (from 62 options to 90+), making brute-force attacks dramatically harder.