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Library Settings



Estimates the location of pictures taken without GPS information by extrapolating it from the location of other pictures taken on the same day.

Be aware that, if you have pictures from unrelated events at different locations, the GPS coordinates of pictures from one event will be applied/extrapolated to pictures of the other event that lack coordinates (even if these are in different folders).

Quality Filter

Requires a review of non-photographic and low-quality images before they appear in search results.

Convert to JPEG

Automatically creates JPEG previews for other file types so they can be displayed in search results and in the full-screen viewer.

Convert to JPEG should not be disabled, as this effectively prevents PhotoPrism from indexing file types other than JPEG unless JPEG sidecar files already exist with the same filename prefix. See Stacks to learn more about naming conventions of sidecar files.


Stacks are groups of files that have the same origin but differ in quality, format, size, or color. Go to Photos > Stacks to see all the picture stacks in your library.

PhotoPrism offers three methods for stacking files:

  • Place & Time stacks pictures taken at same GPS position and second
  • Unique ID, matches the Unique Image ID (Exif), Document ID, or Instance ID (XMP)
  • Sequential Name, for example /2018/IMG_1234 (2).jpg and /2018/IMG_1234 (3).jpg

Files that have exactly the same file and folder name are always stacked, for example /2018/IMG_1234.jpg and /2018/IMG_1234.avi.

When you change the stacking settings, already stacked files will not be unstacked automatically.