About this tool
Lossless here has a precise, checkable meaning, so start with what happens to the bytes. A JPEG is a chain of marker segments, and the metadata sits in segments of its own: APP1 carries EXIF — camera, timestamps, GPS — APP13 carries the IPTC and Photoshop blocks, APP2 can carry an ICC profile. Cleaning the file means walking that chain, dropping the segments that hold metadata, and copying the compressed scan data straight through. The entropy-coded image data is never decoded, requantised or re-encoded; it is copied byte for byte, so the pixels that come out are bit-identical to the pixels that went in. Not visually identical. Identical.
Almost every other metadata remover works the other way round: it decodes your JPEG, loses the metadata by virtue of having discarded the whole file, and encodes a new one. That does clean the photo, and it costs you a generation of quality every time — fresh quantisation on top of the old, blocking around edges that were already soft, and often a bigger file than you started with. Strip metadata twice and you pay twice. PNG gets the same byte-level treatment: a PNG is a chain of chunks, so tEXt, iTXt, zTXt and eXIf are dropped while the IDAT image data is copied untouched. Nothing is recompressed, in either format.
Drop in a whole folder of photos and they are cleaned in one pass, downloadable individually or all at once. Each file comes with a before/after metadata comparison — which tags were found, which were removed, what is left — because 'metadata removed' as a bare claim is not something you can check, and being checkable is the entire point of this page. Re-open a cleaned file in the EXIF viewer if you want a second opinion from a different code path. All of it runs in your browser: a tool that offered to protect your photos' privacy by uploading them to a server first would be a strange thing to trust.
The reason this matters is dull and specific. A photo taken in your living room and posted publicly usually contains the coordinates of your living room to within a few metres, plus the time it was taken and the phone that took it. Sell something on a marketplace with a shot taken at home, post your dog in a hobby group, send a holiday picture to a forum — the address travels along in fields nobody reads until somebody does. Big platforms recompress uploads and strip metadata as a side effect, but direct file transfers do not: email attachments, cloud links, Discord and Telegram file sends, anything handed over as a file. Clean it once, before it leaves.