What photo metadata is
Cameras and phones write extra information into each image file, mostly in a format called EXIF. It can include GPS coordinates accurate to a few meters, the date and time, the camera or phone model, lens settings, and sometimes the device's serial number or the owner's name. Editing apps add their own notes, called XMP.
Most big social networks strip this when you post. Email attachments, messaging apps that send "original quality", cloud links, marketplaces and forums often don't. A photo of something you're selling, sent as a file, can show where you live.
How this tool removes it
The tool reads the file's structure and copies every part except the metadata blocks: EXIF, XMP, IPTC, comments and camera maker notes in JPEGs, text and EXIF chunks in PNGs, and EXIF and XMP in WebP. The compressed image data is copied byte for byte, so there is no quality loss, and the color profile is kept so colors look the same.
Phones often save photos sideways and use an EXIF setting to say "rotate this when showing it". With Keep the rotation setting ticked, the cleaned file keeps that one value and nothing else.
Checking a photo before you share it
Drop a photo in and look for the highlighted Location row. If it's there, the file reveals where it was taken; the link opens the spot on a map, so you can see exactly what someone else would see. Camera serial numbers can also tie different photos to the same device.
Limits
HEIC photos (the iPhone default) can't be processed in most browsers yet. Save them as JPEG first, or use the iPhone share sheet's Options to turn off location before sending. RAW camera files aren't supported. Metadata is only one way a photo can reveal a location; street signs, house numbers and reflections in the picture itself are not something any tool can remove.
Got other data you want to look through privately? See the Instagram unfollowers checker and the Spotify listening history analyzer.