Can every damaged PDF be repaired?

No. Structural damage can often be fixed, but if page data is missing, for example after an interrupted download, it cannot be recreated.

Are my PDF files uploaded?

No. The document is opened and rewritten inside your browser. It is never sent to a server, and closing the tab discards it.

JavaScript is turned off. InspireTools processes files in your browser, so the tools need JavaScript to run.

Rebuild the structure of a PDF that will not open properly.