Rebuild a PDF with object streams to shrink its file size.
Free, runs entirely in your browser, and nothing you enter is ever uploaded to a server.
It depends entirely on the file. This rewrites the document structure, so text-heavy PDFs can shrink noticeably while image-heavy ones barely move — the tool shows the real figure rather than a promise.
No. Nothing is re-encoded, so images and text are byte-identical. That is also why the saving is modest on scanned documents.