Which resolution should I choose?

150 DPI suits screens and sharing. Use 300 DPI for printing; files are about four times larger.

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.

Unlock it first with the Unlock PDF tool, using its password. Protected files cannot be processed directly.

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

Convert PDF pages to JPG images at the resolution you choose.