The present invention extends to methods, systems, and computer program products for locally storing Web-based database data. Embodiments of the present invention permit Web-based database data to be locally stored at a computer system to increase the efficiency of rendering the Web-based database data within a Web browser at the computer system. Web-based database data can be sandboxed per domain to mitigate (and possibly eliminate) the exposure of the Web-based database data to malicious computer systems. Space allocated to each domain can be initially set and then subsequently altered by a user.