The present application provides a method and a device for previewing a dynamic image, and a method for displaying an expression package. The dynamic image includes several frames of static image data. The method for previewing a dynamic image includes: extracting at least one frame of static image data having a designated frame number from the dynamic image; and displaying the extracted static image data. By means of the technical solution of the present application, a preview image does not need to be downloaded when the dynamic image is previewed. When the method is applied to an expression package, the size of an expression package installation file can be reduced, and network traffic is saved. Moreover, the workload of expression package creating personnel can be reduced, and the expression package creating efficiency is improved.
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