Editing Encyclopedia:Image use policy (section)

====Uploaded image size<span id="high-res"></span>====
{{Shortcut|WP:FILESIZE}}
{{redirect|WP:FILESIZE|text=You may be looking for [[#Displayed image size|Displayed image size]], another section on this page}}
Wikipedia and its sister projects are repositories of knowledge, so images should be uploaded at high resolution whether or not this seems "necessary" for the use immediately contemplated{{mdashb}}"saving server space" is ''not'' a valid consideration in general, though there is a 1,000{{nbsp}}MB (1{{nbsp}}GB) limit.
Exception: If the image is [[WP:NFCC|copyrighted]] and used under fair use, the uploaded image must be as low-resolution as possible consistent with its fair-use rationale, to prevent use of Wikipedia's copy as a substitute for the original work.

The servers automatically handle the scaling of images (whatever their original size) to the sizes called for in particular articles, so it is neither necessary nor desirable to upload separate reduced-size or reduced-quality "thumbnail" versions, although compressing [[Portable Network Graphics|PNGs]] may be useful.