EXIF Cleaner
Photos carry hidden data: the camera, the exact time and often the GPS location of where they were taken. See it, then remove it without re-compressing the picture.
Removes EXIF, GPS, XMP, IPTC/Photoshop data, comments, embedded thumbnails and extra images stored after the picture (JPEG), and text, EXIF and time chunks (PNG). The pixels are copied byte for byte, so quality is unchanged.