Cobrowsing web sites by two or more users is disclosed. For a cobrowsing session between a first client of a first user and a second client of a second user, the cobrowsing session is first initiated. The first user browses a web site on the first client. The first client sends to the second client a synchronization message. The synchronization message indicates one or more commands reflecting the browsing performed by the first user. The second client receives the synchronization message, and cobrowses the web site in accordance with the message and its included commands. Cobrowsing continues until the cobrowsing session is terminated. The commands of the synchronization message allow for fine granularity of cobrowsing.