The present disclosure describes how to capture events (e.g., changes and user interactions) of a Web document and combine those changes with the original DOM displayed to accurately and efficiently enable a replay engine to redisplay the DOM, changes, and user interactions which occurred within a user's browser. The data collected from a client-side HTML DOM capture engine can be combined with a minimal amount of contextual information to a replay engine so as to accurately and efficiently replay a session of a plurality of web documents.