What if the limit cannot be reached?

You are told the smallest size that stayed readable, so you can raise the limit, split the document or try grayscale.

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.

Shrink a PDF to under 1 MB, or any other size limit.