Free Password Generator
Generate cryptographically secure random passwords in your browser. Customise length (8–128 chars), character types, and exclude ambiguous characters. Passwords never leave your device.
Passwords are generated using window.crypto.getRandomValues() — never sent to any server.
About Free Password Generator
Every online account you create should have a unique, randomly generated password. Despite this being well-understood security advice, most people still reuse the same few passwords across dozens of accounts. When any one of those services has a data breach — and breaches happen at thousands of companies every year — attackers can use the exposed credentials to access all your other accounts through a technique called credential stuffing. The only defence is using a different, strong password for every single account.
Our free password generator creates cryptographically secure random passwords directly in your browser using window.crypto.getRandomValues() — the Web Crypto API that browsers expose for exactly this purpose. Unlike Math.random(), which is a pseudo-random number generator not suitable for security purposes, the Web Crypto API uses hardware entropy sources that make the output genuinely unpredictable. You control every aspect of the generated password: length (8–128 characters), which character types to include (uppercase A-Z, lowercase a-z, digits 0-9, symbols !@#$%^&*…), whether to exclude visually ambiguous characters (0/O, 1/l/I) for passwords you need to type manually, and how many passwords to generate at once. A real-time entropy display and strength meter (Very Weak → Very Strong) quantify exactly how resistant each configuration is to brute-force attacks. Generated passwords are never transmitted — the entire process is local to your browser.
Key Features
Everything you need — no software installation required.
Cryptographically Secure Randomness
Passwords are generated using window.crypto.getRandomValues() — the Web Crypto API built into all modern browsers. This uses hardware entropy sources that produce genuinely unpredictable output, unlike Math.random() which is a deterministic pseudo-random number generator not suitable for security-critical applications.
Flexible Length Control
Generate passwords from 8 to 128 characters long using the length slider. A 16-character password with mixed character types has approximately 95 bits of entropy — equivalent to trying 39 septillion combinations. A 24-character password approaches 142 bits of entropy, which is effectively uncrackable with current or foreseeable technology.
Configurable Character Sets
Toggle uppercase letters (A-Z), lowercase letters (a-z), digits (0-9), and symbols (!@#$%^&*...) independently. All four types enabled gives the largest character pool and maximum entropy per character. Symbols dramatically increase security — enabling them at length 16 adds approximately 10 extra bits of entropy compared to alphanumeric only.
Exclude Ambiguous Characters
For passwords you need to type manually (Wi-Fi passwords, master passwords entered on physical devices), enable the 'Exclude ambiguous characters' option. This removes visually similar characters: 0/O (zero and capital O), 1/l/I (one, lowercase L, capital i). The password is slightly shorter in effective entropy but much easier to transcribe accurately.
Entropy & Strength Meter
The entropy display shows the exact number of bits of entropy for your current configuration (length × log₂(character pool size)). The strength meter (Very Weak → Very Strong) translates this into an intuitive quality indicator. Aim for at least 60 bits (Good) for standard accounts and 80+ bits (Strong) for email, banking, and password manager master passwords.
Generate Multiple Passwords
Generate 1, 3, 5, or 10 passwords at once. Each password is independently generated from fresh randomness. Generating multiple passwords lets you pick the one that feels most memorable (some people prefer passwords without consecutive consonants or confusing character clusters) without sacrificing randomness — all options are equally secure.
How to Use Free Password Generator
Get your result in seconds — completely free, no registration needed.
Set password length
Drag the length slider to your desired password length. For most online accounts, 16–20 characters is the recommended range. The entropy display updates in real time to show the bits of entropy for your current configuration.
Choose character types
Toggle the character type buttons to include or exclude uppercase letters, lowercase letters, numbers, and symbols. All four types enabled is recommended for maximum security. If you need to type the password manually, consider enabling 'Exclude ambiguous characters' to avoid confusion between 0/O and 1/l/I.
Generate your password
Click Generate Password (or Generate Passwords for multiple). Each click creates new passwords from fresh cryptographic randomness — the generation is not deterministic and cannot be reproduced. If generating multiple passwords, they are all displayed as selectable options.
Copy and store securely
Click Copy next to the password you want to use. Immediately paste it into a password manager (Bitwarden, 1Password, KeePass) rather than writing it down. A password manager is the only realistic way to maintain unique, strong passwords for every account you own.
Password Strength Reference
Wide format support ensures compatibility with virtually any file you upload.
| Format | Description | Best For | Quality |
|---|---|---|---|
| 16 characters, all types | ~95 bits of entropy. Recommended minimum for most accounts. Crack time: centuries with state-of-the-art hardware. | Social media, forums, shopping accounts | Strong |
| 20 characters, all types | ~118 bits of entropy. Excellent for sensitive accounts. Effectively uncrackable with current technology. | Email, cloud storage, financial accounts | Very Strong |
| 24+ characters, all types | ~142+ bits of entropy. Military-grade security. Recommended for password manager master passwords. | Password manager master, work admin accounts | Extremely Strong |
| 8 characters, letters only | ~45 bits of entropy. Minimum acceptable for non-critical accounts. Crackable in hours with GPU cluster. | Low-value accounts only — avoid for important services | Weak |
Who Uses Free Password Generator?
Trusted by millions of users across different industries and workflows.
New Account Registration
Every time you create a new account on any website or app, use this generator to create a unique password. Copy it directly into the password field and let your password manager save it. Never reuse a password from another service.
Password Rotation
After a data breach notification, or as part of a periodic security review, use the generator to replace old passwords with fresh, strong alternatives. Generate a new password, update the account, and update the entry in your password manager.
Wi-Fi Network Passwords
Your home Wi-Fi password is the key to your entire home network. Generate a 20+ character password with all character types. Because you only need to type it when connecting new devices, the ambiguous character exclusion option keeps it readable without sacrificing security.
IT Administrators
System administrators frequently need to create temporary passwords for user accounts, service accounts, and API credentials. Generate strong passwords in bulk (up to 10 at once) to provision multiple accounts efficiently. The browser-only processing means credentials are not logged by any third-party service.
Password Manager Setup
When setting up a new password manager, you need a single master password that is both very strong and memorable (since you cannot store it in the manager itself). Generate a 24-character password, write it down and store it securely offline, then use the manager to generate unique passwords for everything else.
Encryption Keys & Passphrases
Generate strong keys for disk encryption (VeraCrypt, BitLocker), GPG keys, SSH keys, and other cryptographic operations. For encryption keys, use maximum length (48–64 characters) with all character types for the strongest possible protection of encrypted data.
Why Choose Our Tool?
Built for speed, privacy, and reliability — everything works right in your browser.
Genuinely random — not pseudorandom
window.crypto.getRandomValues() uses hardware entropy sources that produce output that is statistically indistinguishable from true randomness. This is the same API used by cryptographic libraries and security tools.
Completely private — no server
Your generated passwords exist only in your browser's JavaScript memory. No password is ever transmitted over the network. You can verify this by opening DevTools Network tab — no request is made when generating.
No account or signup required
Generate passwords immediately without registering, providing an email address, or subscribing to anything. The tool is completely free and anonymous.
Works offline
After the page loads, password generation works with no internet connection. The Web Crypto API is a browser built-in — it does not require network access.
Pro Tips & Best Practices
Get the best results with these expert recommendations.
Always use a password manager
A password generator is only half the solution. Without a password manager, you cannot practically maintain unique passwords for the dozens or hundreds of accounts most people own. Bitwarden is free, open-source, and excellent. 1Password and KeePass are also strong options.
Length beats complexity
A 20-character lowercase-only password has more entropy than a 12-character password with all character types. Length is the most important factor in password strength. Prefer longer passwords over shorter 'complex' ones with many character types.
Enable symbols for maximum entropy per character
Adding symbols increases the character pool from 62 (alphanumeric) to ~95 characters. This adds roughly 0.7 bits of entropy per character — equivalent to adding about 1.3 extra characters of length. Always enable symbols unless the target service does not support them.
Never reuse passwords
If a service you use has a data breach — and breaches are extremely common — attackers will immediately try your exposed password on other major services (email, banking, social media). Password reuse turns a single breach into a complete account compromise across all services.
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Frequently Asked Questions
Everything you need to know about Free Password Generator.