About GenPass

GenPass is a free collection of password and security tools that run entirely in your web browser. It started from a simple frustration: most “free password generator” sites are slow, covered in pop-ups, or never explain how they create your password or whether they keep it. GenPass aims to be the opposite: fast, transparent and private by design.

What we offer

• Password creation: a random password generator, a Diceware-style passphrase generator, a pronounceable password generator, a password-from-text tool and a PIN generator.
• Password checking: an advanced strength checker that estimates crack time, and a breach checker that tells you whether a password has appeared in known data breaches without revealing it.
• Developer utilities: hashing, Base64, JSON formatting, UUIDs and tokens, a regex tester, test data, placeholder text and QR codes.
• Guides: plain-language articles on passwords, passphrases, breaches and account security.

How we build the tools

• Local processing. Generators and converters run as JavaScript on your device. The passwords, text and data you enter are not sent to our server.
• Proper randomness. Security-sensitive tools use the browser’s Web Crypto API (crypto.getRandomValues), a cryptographically secure random number generator, not Math.random.
• Proven methods. We rely on well-studied, open approaches: the zxcvbn strength estimator, the EFF passphrase wordlist and the k-anonymity model used by Have I Been Pwned.
• Honest explanations. Every tool page explains how it works, what its limits are and when a different tool is the better choice.

How we keep the site running

GenPass is free to use. To cover hosting and development costs the site may show advertising from Google AdSense. Ads are kept separate from the tools and never have access to anything you type into them. See our Privacy Policy for details.

Keeping things up to date

Security advice changes. We review the tools and guides regularly against current recommendations from bodies such as NIST (SP 800-63B) and the UK National Cyber Security Centre, fix bugs as they are reported, and add new tools based on what visitors ask for.

Get in touch

Found a bug, have a suggestion or a question about a tool? Visit the contact page. We read every message.