An online integrated development environment (IDE) providing code assist is described. A method for providing code assist within the online IDE comprises receiving a request from a client device to access a software development project, storing code assist information related to the software development project, and sending code assist information to the client device. The client device stores the received code assist information and uses it for local code assist operations at the client device. The client device can receive a subset of a database of code assist information stored at a server environment providing the online IDE. The client device accesses the online IDE via a web browser.