Find and extract embedded thumbnails inside JPEG APP1, MP4 udta, and PSD layer previews. Forensic tool.
Free is enough for most one-off jobs. Pro raises the file and batch caps; Pro + Media unlocks GB-scale streaming and unlimited duration.
Larger files supported on Developer (5 GB CSV) and Enterprise (unlimited). All processing happens in your browser — files never reach a server.
Drop a JPEG, MP4, or PSD file.
The tool parses container segments to locate embedded preview images.
Download every thumbnail found as a ZIP.
0 bytes uploaded. Hidden Thumbnail Extractor runs entirely in your browser. Files, passwords, and PGP private keys never leave your device. No analytics fire during processing — only after you opt-in to dashboard audit logging.
Cameras and editors embed previews for fast browsing — but those previews can leak earlier crop or color states.
No. Original file is unchanged; thumbnails are extracted, not removed.