Exif Thumbnail Adder

Exif Thumbnail Adder is an Android utility for JPEG images that do not contain an embedded EXIF thumbnail. It adds a thumbnail entry to the EXIF metadata of such pictures, allowing software that reads this metadata to display a smaller preview derived from the image file. The app is aimed at a narrow maintenance task rather than general photo editing.

The application supports batch processing, so multiple JPEG pictures can be handled in one operation instead of being processed one by one. Its function is limited to adding thumbnails in EXIF tags for JPEG files lacking them; it is not described as a converter, organizer, or image retouching tool. The software is distributed under the GPL-3.0-or-later license.