Password Generator
Generate cryptographically secure passwords with customizable length and character options. Choose from uppercase, lowercase, numbers, and symbols. Real-time strength indicator helps you create strong passwords.
Our free Password Generator creates cryptographically secure passwords using your browser's built-in crypto.getRandomValues() API—the same technology used by security professionals. Unlike weak random generators, this tool produces truly unpredictable passwords that protect your accounts from brute-force attacks, dictionary attacks, and credential stuffing. Customize your password with adjustable length (8-64 characters) and character options including uppercase, lowercase, numbers, and symbols. The real-time strength indicator helps you understand your password's security level. Your passwords are never stored, transmitted, or logged—all generation happens entirely in your browser for complete privacy.
Character Types
Your Passwords Stay Private
All password generation happens directly in your browser using the securecrypto.getRandomValues()API. No passwords are ever transmitted to any server, stored in any database, or logged anywhere. Once you leave this page, your generated passwords exist only if you saved them.
How to Use the Password Generator
- Set your password length using the slider (8-64 characters). Longer passwords are exponentially more secure.
- Choose character types by toggling the checkboxes. Using all four types (uppercase, lowercase, numbers, symbols) creates the strongest passwords.
- Click "Generate Password" to create a new secure password. A password is automatically generated when you first load the page.
- Check the strength meter to ensure your password is strong enough for your needs. Aim for "Strong" or "Very Strong".
- Copy your password using the Copy button and store it in a password manager (recommended) or a secure location.
Understanding Password Strength
Password strength depends on two main factors: length and character variety. Each additional character exponentially increases the number of possible combinations an attacker must try.
| Strength | Characteristics | Use Case |
|---|---|---|
| Very Weak | <8 chars, single type | Never use |
| Weak | 8-11 chars, 2 types | Low-value accounts |
| Fair | 12-15 chars, 3 types | General accounts |
| Strong | 16-19 chars, all types | Important accounts |
| Very Strong | 20+ chars, all types | Critical accounts, master passwords |
Related Security Tools
Need to hash passwords for storage? Use our Hash Generator for MD5, SHA-1, and SHA-256 hashing. Need unique identifiers? Try our UUID Generator to create cryptographically secure UUIDs.
Frequently Asked Questions
How secure are the passwords generated by this tool?▼
Very secure. This tool uses crypto.getRandomValues(), a Web Crypto API that provides cryptographically strong random values. This is the same level of randomness used by security professionals and is suitable for generating passwords, encryption keys, and other security-sensitive data. Each generated password has true randomness—there are no predictable patterns.
What is password entropy and why does it matter?▼
Entropy measures the unpredictability of a password in bits. It's calculated as log₂(possible characters) × password length. Higher entropy means more possible combinations an attacker must try. A password with 128 bits of entropy would require 2¹²⁸ guesses in a brute-force attack—more than all the atoms in the observable universe. Aim for at least 60 bits for general use and 128+ bits for critical accounts.
Should I use special symbols in my password?▼
Yes, when possible. Including symbols increases your character pool from 62 (letters + numbers) to 90+ characters, significantly increasing entropy. However, some systems restrict which symbols are allowed. If a site rejects your password, try regenerating with only letters and numbers, or manually remove problematic symbols. Common safe symbols include: ! @ # $ % & * - _ +
How should I store my generated passwords?▼
Use a password manager—this is the most secure and convenient option. Popular choices include Bitwarden (free, open-source), 1Password, and Dashlane. Password managers encrypt your passwords with a master password and can auto-fill them on websites. Never store passwords in plain text files, browser notes, or unencrypted documents. If you must write them down, store the paper in a secure location like a safe.
Why is this better than using a memorable password?▼
Human-created "memorable" passwords follow predictable patterns that attackers know well: common words, letter-to-number substitutions (a→@, e→3), keyboard patterns, and personal information. These patterns drastically reduce the actual number of guesses needed. A randomly generated 16-character password is vastly more secure than a 20-character password based on modified words. Use random passwords with a password manager for maximum security.
Frequently Asked Questions
❓ Is this tool free?
Yes! All our tools are completely free. No registration, no hidden charges, no ads. Just open and use.
🔒 Is my data safe?
Absolutely. All calculations happen in your browser. We don't store, send, or track any of your data. Everything is processed locally on your device.
📱 Can I use this on mobile?
Yes! All our tools are fully responsive and work perfectly on smartphones, tablets, and desktops.
🌐 Do I need internet?
No! Once the page loads, you can use the tool completely offline. All calculations happen in your browser without any server connection.