Introducing Webmunk, a web browser extension and data collection platform to conduct observational and experimental research studies on the Internet. Webmunk will be open-sourced and will be available for all interested researchers. Please contact Andrey Fradkin at afradkin@gmail.com if you’re interested in trying out a beta version of Webmunk for your research.


Tracking a user’s experience:

  • Web browsing history.
  • Website content.
  • Browser settings.
  • User interactions with websites (e.g. scrolling).
  • Cookies.

Modification of user experience:

  • Changing the look and feel of a website.
  • Inserting new content and new interactions into the website.
  • Removing and setting cookies.
  • Acting as a user proxy, by for example filling in forms and selecting options.
  • Reminding users to fill out surveys and conduct certain actions.


Flexible enrollments
Timed study tasks
Add and manipulate page elements


The browser extension component of Webmunk is designed for the Chrome and Edge browsers. The extension can modify the content of web pages in real time and collect data as users browse the Internet. By keeping track of (anonymized) user identities, the extension can implement different web page manipulations across users or over time, which enables researchers to assign different experimental interventions that they may want to compare. The extension uses various techniques to engage study participants in specific tasks beyond their regular browsing activity, such as completing surveys or visiting designated websites.

The cloud server component of Webmunk encompasses two main elements. First, an enrollment server handles the generation of random user IDs and the allocation of experimental treatments and configurations across users and over time. Second, a data transmission server serves as the central hub for collecting both passive and experimental data, which can be stored and analyzed at a later stage. Both servers use the Passive Data Kit (PDK), a comprehensive data collection framework.

All components of Webmunk will be open-source and are designed to be easily extended. Additional functionality can be added to Webmunk through the use of modules. Modules are self-contained and re-usable components that work with Webmunk. In our projects, we've designed modules for identifying products on Amazon and for retrieving users' Amazon order histories. Modules are particularly useful for implementing manipulation and tracking that is particular to a web domain.

A Webmunk white paper is coming soon!