Most AI detectors ask "was this image AI-generated?" Quick Check asks "is this file what my source claims it is?" — a different problem most tools don't solve. Drop any image or video sent by a source, tipster, or colleague and get a provenance report: original metadata, encoding anomalies, AI generation patterns, frame continuity, device signature, and platform fingerprint. Honest about what it can't read. Nothing stored. Results expire in 72 hours. Free, no account required.