Chronolocation Calculator

Chronolocation Calculator is a free open-source-intelligence tool that verifies when and where a photo or video was taken by computing the sun's position, altitude, azimuth, and expected shadows for given coordinates, date and time, returning a citable forensic report.

Active

Since 2026

Chronolocation Calculator is a free open-source-intelligence tool that verifies when and where a photo or video was taken by computing the sun's position, altitude, azimuth, and expected shadows for given coordinates, date and time, returning a citable forensic report. Built by Signal & Shadow (a verification/OSINT project), it lets journalists and investigators cross-check whether an image's shadows match its claimed time and place, formatting the output for evidentiary dossiers, a browser-based utility for one specific, high-value verification technique.