About SecurePass
StrongPasswordGenerator.dev is a free, privacy-first password security tool. We built it because most password generators are either too simple, ad-riddled, or — worst of all — send your generated passwords to a server. Ours never does.
Every password generated on this site is created entirely in your browser using the Web Crypto API (crypto.getRandomValues()). Nothing is transmitted. Nothing is logged. We have no way to see the passwords you generate even if we wanted to.
Alongside the generator, we publish a free security blog covering password managers, two-factor authentication, VPNs, and practical security advice for everyday users.
How the Generator Works
Passwords are generated using cryptographically secure randomness from the browser's built-in crypto.getRandomValues() API — the same standard used by secure applications worldwide.
Strength is calculated using Shannon entropy: the number of bits of randomness in your password given its character set and length. Crack time estimates assume a dedicated attacker running 10 billion guesses per second.
Password history is stored only in your browser's localStorage — it never leaves your device and is cleared when you clear browser data.
Our Recommendations Philosophy
Our Recommended Tools page lists products we genuinely endorse. Some links are affiliate links — we earn a small commission if you sign up, at no cost to you. This helps keep the site free.
We only recommend tools we'd use ourselves. Affiliate relationships never influence which tools we list or how we describe them.