Your photos, filed by the day they were taken.

Kettlemark is a small command-line tool that renames photos and videos using the date stored inside each file. IMG_4021.HEIC becomes 2026-03-14_091522.heic, and every folder sorts itself in the order things happened.

$ kettlemark preview ~/Pictures/Goa
IMG_4021.HEIC   ->  2026-03-14_091522.heic
IMG_4022.HEIC   ->  2026-03-14_091547.heic
DSC00118.JPG    ->  2026-03-14_101003.jpg
VID_0007.MP4    ->  2026-03-14_174410.mp4

4 files will be renamed. Run "kettlemark rename ~/Pictures/Goa" to apply.

Three commands, in this order

1. Preview. kettlemark preview shows every new name and changes nothing.
2. Rename. kettlemark rename applies the names and keeps a log in the folder.
3. Undo. kettlemark undo puts every file back, using that log.

Start here

New to Kettlemark? Install it and rename your first folder in about five minutes. Looking for a flag or setting? The command reference and configuration reference list them all.