Systems and methods are described for managing saved web pages on a user device. In an example, when a user bookmarks a web page at the user device, the user device can send the bookmark to a server. A service on the server can gather information about web page and associate a plurality of tags with the web page based on that information. The service can compare the web page's tags to tags of other previously bookmarked web pages to identify a possible matching web page. The service can perform a semantic similarity analysis between the two web pages to determine whether their similarity exceeds a threshold. Where the similarity does exceed the threshold, the service can notify the user device. The user device can notify the user and present options for the new bookmarked web page.