undetectable.me

Hidden thumbnail remover

Remove the hidden thumbnail from a photo

Most JPEGs carry a small embedded thumbnail of themselves. The catch: some editors never update it, so after you crop out a face or a number plate, that thumbnail can still hold the original, uncropped shot. Drop a photo in below to strip it.

Runs entirely in your browser. Your photo is never uploaded or stored.

Why the thumbnail matters

The embedded thumbnail is meant as a quick preview, but it is a separate little image stored inside the file. If you crop or blur part of a photo in an editor that does not rewrite it, the thumbnail can keep the version from before your edit, which quietly undoes the crop for anyone who knows to look. Stripping it closes that gap.

What this removes

It deletes the embedded thumbnail block from the file's EXIF. On a JPEG this is done directly and the main picture is untouched. The thumbnail lives in JPEG metadata, so a PNG or WebP usually has none; for those, re-saving the file drops any stray metadata anyway. To clear everything at once, use the full metadata remover.

Your photo stays on your device

The file is read and re-saved entirely in your browser. Nothing is uploaded, and the clean copy is built locally when you click download. Your original file is never changed.