Are my files uploaded?

No. Files are read and processed inside your browser. They are never sent to a server, and closing the tab discards them.

Does it delete anything?

No. A web page cannot delete your files. The tool tells you which files are identical so you can remove the extras yourself.

No. Only byte-for-byte identical files are reported. A resized or re-saved photo is a different file.

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

Find identical files by content, even when they have different names.