Secure Password Generator

Password strength is measured in bits of entropy — the number of possible combinations. Each extra character multiplies that space. A 20-character password using only lowercase letters (26 options) has higher entropy than an 8-character password using all character types (94 options). Practical advice: prioritize length and include at least uppercase, lowercase and numbers.

Ambiguous characters are those that look visually similar: zero (0) and uppercase O (O), the number one (1), lowercase letter L (l) and uppercase I (I). Excluding them is useful when you need to type the password by hand or read it on screen, reducing transcription errors. If you always copy/paste through a password manager, there is no need to exclude them.

Yes, as long as generation is entirely local. This tool uses the browser's Web Crypto API (crypto.getRandomValues()), which generates cryptographically secure random numbers on your device. No password is ever sent to any server, stored in cookies or logged anywhere. You can verify this by disconnecting from the internet before using it — it will keep working exactly the same.

When a service suffers a data breach, compromised passwords are published in databases that attackers use to test against other sites (credential stuffing). If you reuse the same password across multiple services, a single breach compromises all your accounts. The solution is a unique password per service, managed with a password manager like Bitwarden (free and open source) or similar tools.

It is a theoretical estimate of how long it would take an attacker to try every possible combination using a modern GPU (≈100 billion attempts per second against a fast hash). The actual time depends on the hashing algorithm used by the service: with bcrypt or Argon2 the cost multiplies by millions. The indicator is useful for comparing options, not as an absolute guarantee.

System and IT administrators use it to generate secure initial passwords when creating user accounts, configuring services, or rotating server credentials. Information security officers use it to ensure that passwords for critical access points (databases, admin panels, VPNs) are neither predictable nor reused. Developers and DevOps engineers use it to generate tokens, API keys, environment secrets, and random strings for environment variables. Users who manage many personal accounts (email, banking, social media, subscriptions) use it alongside a password manager to have a unique key for every service. Companies onboarding new employees use it to provide strong temporary credentials that the user changes on first login.

On desktop, press Ctrl + D (Windows/Linux) or Cmd + D (Mac) in Chrome, Firefox, or Edge to add this page to your bookmarks instantly. In Safari for Mac, use Cmd + D or go to Bookmarks → Add Bookmark. On mobile with Chrome (Android), tap the three-dot menu (⋮) and choose "Add to Home screen" or "Add to bookmarks." On mobile with Safari (iPhone/iPad), tap the share button (□↑) and then "Add to Home Screen." Having it one tap away on your home screen is most useful at the exact moment you need to create a new account with a secure password.