Strip the metadata out of a photo before you post it — the GPS coordinates, the camera and lens, the timestamps, the editing history and the embedded thumbnail. The pixels are copied through untouched, so nothing is re-compressed and the picture does not lose quality. Works on JPEG , PNG and WebP , in your browser.
A colour profile says nothing about you, but it is often the largest thing in the file. Drop it and the image gets smaller; keep it and the colours stay exactly as the camera or the editor intended. Everything else identifying goes either way.