Systems and methods are provided for authoring a web page to be run-time editable. A software code authoring tool is provided that enables authoring of web page source code that defines run-time edit capabilities that are permitted for editing content of the output presentation of the page. An improved content management solution is thus provided that enables a user-friendly way for a designer's customers (or other authorized users) to edit content of the output presentation of a page, while providing the designer the ability to control the amount of edit capability of the page that the customer is afforded. For instance, an authoring tool enables the designer to designate in the web page source code certain portions of the page that are to be run-time editable by an authorized user, wherein the designated portions may be edited by a user by interacting with a run-time output presentation of the page.