Carl Carlenius is a free Chrome browser extension that simplifies the process of managing your favorite car listings from various used car marketplaces. With a focus on user-friendliness, this tool gathers car listings from popular websites such as cars.com, carsandbids.com, autotrader.com in the US, mobile.de in Germany, and bilbasen.dk in Denmark.

Not only does Carl Carlenius allow you to consolidate your viewed car listings in one convenient space, but it also offers tools to help you evaluate the history and value of the cars you are interested in. By providing these features, Carl Carlenius aims to streamline the car browsing experience for users across different regions.