Shield
Extension Delisted
This extension is no longer available in the official store. Delisted on 2025-09-17.
Improve your online security by preventing password reuse and phishing.
What does it do?
When you reuse your password across multiple sites, you open yourself up to password hackers that can steal your financial and identity data. Shield alerts you whenever you use the same password on multiple sites, and gives you a clear path to take charge, change those passwords, and make your online identity more secure.
Shield also checks each webpage you visit and validates that you’re in the right place. It detects when a lookalike website is trying to steal your password and alerts you right on the screen.
Password hackers are getting more sophisticated every day - from a simple malicious link in an email to actually intercepting your SMS texts, it’s more important than ever to have good password health.
How does it work?
Each time you sign into a website, we look at the website address and password used and search for a match against a cache of the websites you have previously signed into. If we detect a weak or reused password, a notification on the screen appears, advising you to change the password for the website.
Using a secure, one-way hash, passwords are stored locally in your browser. The sites you visit and the password hashes are never tracked back to a server.
Privacy
Shield has been carefully developed with privacy as one of its guiding principles. It does not use cookies, track your website usage, or utilize any other information that could be used to identify you.
See our Privacy Policy (https://passwordmedic.com/privacy.html) for more detail.
Enterprise
An enterprise version of Shield is available that simplifies the process of company-wide deployment and provides administrator alerts when password reuse or phishing is detected.
In enterprise mode, a login button is visible that lets users sign in so that administrators can be alerted to users that have bad password hygiene.
Latest reviews
Lightweight way to ensure that you're keeping good password hygiene. I recommend this to everyone.
Love this extension! It keeps me honest when creating new passwords!
Awesome!
Shield and Bitwarden are my two favorite extensions. I'm paranoid about password security and these help a lot.
I love it - simple solution and I can't wait to show it in my children's school, because they are working with kids about this stuff a lot and my children (10 years old) were able to understand how it works and why they need it and you know on Chromebook the best one solution for keep your passwords safe: -)
Amazing! I used to reuse passwords for most of my apps., Shield not only alerts me not to reuse the same passwords, but also to move away from weak ones. Recommended!
I knew my password re-use was not great, but this tool brought increased visibility into the extent of the problem, which of course was way worse than I initially thought. And now I can actually do something about it!
This extension has already helped me avoid using a weak password and also caught me when I was reusing a password that I had used previously. Really helps encourage me to live my best internet life.
No more reuse! Works perfectly.
Narrowly avoided a phishing scam, thanks to this extension
Awesome extension. I feel a lot safer knowing Shield is checking for password reuse.
Easy to use and helps me make sure I'm not reusing passwords, which is pretty cool.
Super useful, helps a lot to avoid reuse my password
Simple and easy. Already caught an 'easy' password I was using. Highly recommended.
Super easy and very insightful!
Keeps users honest and alerts them when they reuse passwords - easy.
Works like a charm, thanks!
