Allformaat is a Blender add-on for outputting a render in all 14 image formats that Blender supports, simultaneously. Render once and receive output in every selected format, which removes the need for a separate rendering session per format.
The add-on can generate and review multiple file formats from a single render, side by side, letting you evaluate format quality without re-rendering. Because rendering occurs in the background, real-time render previews are not available as they are in Blender's native rendering window. It does not support video formats.
Allformaat has been tested on Windows, and since it does not use any resources outside of Blender, it should also work on Linux and macOS. It is distributed as an add-on under the GPL license, and a demo and documentation video is available.