A client device can implement a client-side application for a server-side online content management system. The client-side application can communicate with the server-side online content management system to sync data stored locally on the client-side with data stored on the server-side. A local web server can be implemented on the client device to work in conjunction with the client-side application, such that the local web server can access the data stored locally. The client device can run a web browser that communicates with the local web server. A user of the client device can use the web browser to connect to the local web server to access the synced data stored locally on the client-side. Advantages of accessing the data stored locally using the web browser via the local web server include performance improvements, offline access to the data, and use of native client applications to interact with the data.