100% Private · No Server · No Tracking

Generate Secure Passwords

Cryptographically strong passwords generated entirely in your browser. Your passwords never leave your device.

100% Client-Side

Runs entirely in your browser

Crypto Secure

Uses crypto.getRandomValues()

Works Offline

No internet required

Zero Tracking

No analytics, no logs

Password Length
16
8326496128

Character Sets

Generated Password

Click "Generate" to create a password

Press ⌘G to generate · ⌘C to copy

Use the controls on the left to customize your password.
Passwords update automatically as you change settings.

What Is a Secure Password?

A secure password is one that is long, random, and unique. It must be long enough to resist brute-force attacks (16+ characters), generated with true cryptographic randomness so it contains no predictable patterns, and used on only one account so that a breach of one site doesn't compromise others.

Password strength is measured in bits of entropy — calculated as L × log₂(N), where L is length and N is the character pool size. A 16-character password using all character types achieves over 100 bits of entropy, which is effectively uncrackable even by the most powerful computers on Earth.

Why Trust a Client-Side Generator?

Most online password generators make network requests — every password you generate could be logged on their server. SecurePass is different: every password is generated entirely in your browser using the crypto.getRandomValues() Web Crypto API.

You can verify this yourself: open Chrome or Firefox DevTools, go to the Network tab, and generate a password. You will see zero outgoing requests. No data leaves your device. Ever. This makes SecurePass the safest password generator available online.

Frequently Asked Questions

How long should a strong password be?

A minimum of 16 characters for regular accounts, 20+ for important accounts (email, banking), and 24+ for your password manager master password. Each additional character exponentially increases security.

Is it safe to use an online password generator?

Only if it's 100% client-side. SecurePass runs entirely in your browser — open DevTools and check the Network tab. You'll see zero outgoing requests. Your passwords never touch any server.

Should I include symbols in my password?

Yes. Including symbols expands the character pool from 62 (letters + numbers) to 94 characters, increasing entropy by about 30% per character. For a 16-char password, that's the difference between 96 and 105 bits of entropy.

What makes crypto.getRandomValues() more secure?

Math.random() uses a predictable pseudo-random algorithm that can be reversed or predicted. crypto.getRandomValues() draws entropy from your operating system's hardware entropy pool — truly unpredictable, cryptographically certified.

How often should I change my passwords?

NIST's current guidance (2024) says you should only change passwords after a confirmed breach — not on a regular schedule. Frequent forced changes lead to weaker passwords. Instead, use a unique strong password for each account and enable two-factor authentication.

What's the difference between a password and a passphrase?

A password is a random string of characters (high entropy per character). A passphrase is a sequence of random words (easier to memorize). For things you must type from memory, use a 6+ word passphrase. For everything else managed by a password manager, use a 20+ character random password.

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