Stigma. See what's tracking you.

Stigma is a privacy-focused browser extension designed to reveal and explain online tracking in clear, accessible language. It addresses the challenge of understanding and controlling the various trackers that monitor users across the web, making visible the companies and technologies collecting personal data during browsing sessions. The tool emphasizes transparency and user empowerment by showing exactly who is tracking, what data is being collected—such as device information, browsing history, interactions, location, IP address, browser fingerprint, consent preferences, demographics, and time on site—and for what purpose, grouped by company and category (advertising, analytics, social, fingerprinting).

Stigma operates entirely locally within the user's browser, with no server-side processing, uploads, or telemetry. It is open source, with all code publicly available for review on GitHub, ensuring that users can verify its operations. The extension does not require any account creation, sign-up, or email, and collects no data from users. Installation is available for Chrome, Firefox, Edge, Brave, Arc, and other Chromium-based browsers, with the same underlying build and tracker database across platforms.

The extension provides a straightforward workflow: users click the Stigma icon on any site to see a plain-language list of trackers, grouped by company. Each tracker entry details the company, category, and specific data types collected, avoiding technical jargon. Users can then take action by blocking individual companies, all trackers on a site, or entire categories of trackers globally. Additional controls include sending Global Privacy Control opt-out signals and clearing site data with a single click, each accompanied by clear explanations of their effects. Stigma focuses on blocking tracking rather than ads, so while some ads may fail to load as a side effect, it does not remove ads or alter page layouts. For a fully ad-free experience, it can be used alongside dedicated ad blockers.

Stigma is offered free of charge, with no ads, upsells, or hidden data collection. Users may choose to support the project through donations. The tool is intended for anyone seeking greater visibility and control over online tracking, regardless of technical background, and is designed to work in harmony with other privacy tools.