ungoogled-chromium is a free and open-source variant of the Chromium web browser that removes all Google-specific web services. It achieves this with a series of patches applied to the Chromium codebase during the compilation process. The result is functionally similar to regular Chromium.

Some features of regular Chromium do not work the same on ungoogled-chromium. For example, a special browser extension, called chromium-web-store, is required to install other extensions from the Chrome Web Store.

The ungoogled-chromium project was founded by a hobbyist with the user name Eloston in 2015. It was first developed for Linux, then for other operating systems. Eloston used to release builds, but eventually he stopped doing so and allowed others to provide builds with his patches.

Starting in 2019, Eloston greatly reduced his involvement in the project, and other developers have continued to maintain the patches. In 2022, the GitHub repository was transferred from Eloston's personal account to a new "ungoogled-software" account.