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Free password & security tools that never leave your browser

PasswordMDP.com is a free, privacy-focused collection of password and cryptography tools. Generate strong passwords, check password strength, and work with hashes, tokens, and JWTs โ€” every tool runs locally, so nothing you type is ever sent to a server.

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How to create a strong password

A strong password is one of the best defenses against account takeover and identity theft. Experts recommend using at least 12 to 16 characters, and mixing uppercase and lowercase letters, numbers, and symbols. Avoid obvious choices like dictionary words, birth dates, or sequences (e.g. "123456" or "password"). Our password generator creates random passwords that are hard to guess and hard to crack with automated tools.

You should use a different password for every important account. If one service is breached, reusing the same password elsewhere puts all those accounts at risk. Since remembering many long, random passwords is difficult, consider using a password manager: it can store your passwords securely and often can generate strong passwords for you. Our generator is still useful when you need a password on the spot without opening a manager, or when you want to create a master password or recovery codes.

For accounts that support it, enabling two-factor authentication (2FA) adds an extra layer of security. Even if someone obtains your password, they would still need a second factor (e.g. a code from your phone) to sign in. Combine a strong, unique password with 2FA for the best protection.

Password Tools

Generate, check, and manage secure passwords

Cryptography & Encoding

Encryption, hashing, and encoding tools

Web Security

Tools for checking and analyzing web security

In-depth guides

The reasoning behind the tools, with the math shown and sources cited.

All guides โ†’

Privacy & Security Guaranteed

All tools on PasswordMDP.com run entirely in your browser using client-side JavaScript. No passwords or data are sent to any server, stored, or logged. Your privacy and security are our top priorities. Every password you generate stays on your device.

We do not require an account or signup. We do not sell or share your data. For more details on how we handle information and cookies (including those used for advertising), see our Privacy Policy. If you have questions, you can reach us via our Contact page or read more about PasswordMDP.