Systems and methods are provided for rendering an image-based reflowable file. The image-based reflowable file may be configured to adapt itself to be rendered on various sized displays, such as by permitting lines of reflow objects to “reflow” according to the given size of a display. An image-based reflowable file may include one or more reflow objects, where each reflow object forms a sub-image and is defined in a bounding region. Rendering an image-based reflowable file may include determining a horizontal render position and a vertical render position for each bounding region.