Photos can carry the place they were taken, the camera and the date; PDFs can carry the author and the software that made them. Remove it before you share a file. Images are cleaned without being re-compressed, so they look exactly the same.
No. For JPG, PNG and WebP only the metadata blocks are removed; the picture data is copied as it is. A photo keeps its orientation, so it still shows the right way up.
The document information (title, author, subject, keywords, the software that made it and its dates) and the XMP metadata block.
No. Everything happens in your own browser, on your own device. Your files are never sent to a server, so nobody else can see or keep them.
Yes. There are no fees, no sign-up, no watermarks added by us and no daily limits. Your device does the work, which is why it can stay free.