What is hiding in your photos
Every camera and smartphone writes metadata into the image file: the exact time, the device model, lens and exposure settings, often the GPS coordinates of where you stood, and sometimes an embedded thumbnail of the uncropped original. Social networks remove most of it, but email, cloud links, forums and your own website pass it on untouched.
Removal without quality loss
Most tools strip metadata by re-saving the picture, which recompresses it and costs quality. This tool works on the file structure instead. It removes the EXIF, XMP and IPTC segments, embedded thumbnails, comments and any trailer data after the end of the image, and leaves every pixel exactly as it was. For PNG it drops the text and time chunks, for WebP the EXIF and XMP chunks.
What stays in the file
Colour profiles stay, because removing them would change how the picture looks. Orientation data is part of EXIF and is removed too, so a photo that relied on a rotation flag may need to be rotated once. If you only want to look at the metadata first, use the EXIF viewer.