Is my document uploaded?

No. The file is opened and converted inside your browser. It is never sent to a server.

Can it open old .doc or .xls files?

No. Only the modern formats (.docx and .xlsx) are supported. Open the file in an office application and save it in the newer format first.

Later duplicates are numbered, for example "Amount (2)", and blank headings are named after their column letter.

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

Convert an Excel sheet to a JSON array of objects.