Opt Out from Ad Tracking

Install OptMeowt
OptMeowt data privacy cat

What is OptMeowt?

OptMeowt sends Do Not Sell signals to every website you choose to easily opt you out of data selling and tracking. All you need to do is install, and we take care of the work to handle these requests for you.

OptMeowt does not collect any data or information itself. It is 100% open source and non-commercial.


OptMeowt gives you opt out coverage over a multitude of privacy specifications. We support opt out of the sale of your data according to the Global Privacy Control (GPC) spec, the Interactive Advertising Bureau (IAB) spec, and the Digital Advertising Alliance (DAA) spec.


With OptMeowt, you can choose to send Do Not Sell signals to every website you visit automatically, or customize which sites you would like to make these requests to with OptMeowt's Domain List. Customize which sites get these signals on the fly with OptMeowt's extension popup.


OptMeowt was developed by privacy-focused academic researchers at Wesleyan University. We take care to promote users' privacy rights and work hard to streamline users' ability to make privacy-focused choices, in a simple, intuitive, and non-compromising manner.

Installing OptMeowt

OptMeowt is available on the Chrome Web Store and supports all Chromium-based browsers. If you use Chrome, Brave, Edge, Opera, Vivaldi, or any other chrome based browser, you're covered! Firefox is supported as well.

Feel free to check out the OptMeowt repository on GitHub. We publish our released packages there if you prefer to install OptMeowt from source code instead.

Meet the developers

We are researchers at Wesleyan University's privacy-tech-lab 🏫 Feel free to check out our other work at the privacy-tech-lab GitHub!