ShadowFinder Web

How ShadowFinder Web works

Add a photo by dropping it on the left panel (or click Browse). If it carries EXIF data, the metadata panel lets you pull its date, time and GPS.
Mark 3 points on the image: the base of the object, its top, then the tip of the shadow. No photo? Use Manual input to type the height and shadow length directly.
Enter the date and time the photo was taken, and pick UTC or Local.
Calculate. A bright band appears on the map showing every location where that shadow could occur at that moment.
Narrow it down (optional): click New observation, load the same place at a different time, and mark its shadow. Each result adds a band, and where they overlap is the location. Two bands give a fix, a third resolves any ambiguity, so the tool caps it at three. Fixed webcams are ideal for this.

⚠ Shadow length is only accurate when the camera is roughly perpendicular to the shadow, so the shadow runs sideways across the frame. If it points toward or away from you it looks foreshortened, and the result can't be guaranteed accurate. The tool shows this angle and warns you.

Based on ShadowFinder by Galen Reich / Bellingcat.
Browser port by Pawel Kluter.

ShadowFinder

Possible Locations