Disclosed are various embodiments for inhibiting or preventing automated data extraction from network pages. A source for a network page having a document structure is obtained. An obfuscated network page is generated from the network page by altering the document structure to inhibit automated extraction of data. The obfuscated network page is configured to have a visual appearance that is the same as that of the network page when rendered by a client for display. The obfuscated network page is sent to the client in response to a request from the client for the network page.