About PasswordMDP.com

Last updated: October 2026

Our Mission

PasswordMDP.com was created to offer free, easy-to-use security and cryptography tools that put privacy first. We believe everyone should be able to create strong passwords, check password strength, generate passphrases, and use encoding or hashing utilities without signing up, paying, or handing over their data. Our tools run entirely in your browser: nothing you type or generate is sent to our servers or stored by us.

What We Offer

Our site includes a range of tools aimed at both everyday users and developers:

  • Password tools: A random password generator with customizable length and character types, a password strength checker, a passphrase generator, a PIN generator, and a password policy generator to help you define and communicate password rules.
  • Cryptography and encoding: A hash generator (e.g. SHA-256), a Base64 encoder and decoder, a JWT decoder to inspect JSON Web Tokens, and a random token generator useful for API keys or session IDs.
  • Web security: A URL security checker to help you assess links before clicking.

Each tool is designed to be straightforward: you use it in the browser, get an immediate result, and your data stays on your device. Each tool page explains what the tool does and doesn't do, and the in-depth guides cover the underlying security topics — entropy, password cracking, passphrases, NIST guidelines, and JWT pitfalls — in more detail.

Who runs PasswordMDP

PasswordMDP.com is built and maintained by an independent software developer. I started the site in January 2026 because most free password tools online either send your input to a server, hide how they generate passwords, or bury the tool under generic advice that contradicts current standards. I write the code, the explanations, and the guides myself, and I answer the messages that come in through the contact page.

How the tools are built and checked

  • Randomness: every generator uses the browser’s cryptographically secure random number generator (crypto.getRandomValues) with rejection sampling, so each character or word is chosen with exactly equal probability. Nothing uses Math.random().
  • Honest strength numbers: entropy figures are computed from the real character set or word list in use (for example, the passphrase generator’s 2,049-word list gives about 11 bits per word), not rounded up to look impressive.
  • Standards first: password advice follows NIST SP 800-63B-4 (2025). Where older advice you may see elsewhere conflicts with it — such as forced periodic password changes or mandatory symbols — we say so and explain why.
  • Sources: guides cite where their numbers come from (NIST publications, RFCs, published hashcat benchmarks, published research) and show the arithmetic so you can check it.

Corrections and updates

Each guide shows the date it was last reviewed. When a standard changes or a reader reports an error, the affected pages are corrected and re-dated. If you spot something wrong, please let us know.

Privacy and Transparency

We do not require an account or signup to use any tool. We do not collect, store, or sell the passwords, passphrases, or other data you enter or generate. Our site may use cookies and third-party services (such as Google AdSense and analytics) for advertising and to understand how the site is used; details are in our Privacy Policy. The core functionality of every tool works without sending your sensitive input to our servers.

Contact and Feedback

If you have questions, suggestions, or want to report an issue, please use our Contact page. We read feedback and use it to improve the site and add new tools when possible.