Spreadsheet rows as JSON objects, using the first row as keys. Because the .xlsx actually stores types, numbers survive as numbers here in a way they never do from a CSV.
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A modern Excel workbook, which is really a zip full of XML. Unlike a CSV it knows what a number is, holds multiple sheets, and keeps formulas and formatting. It's what people mean when they say 'send me a spreadsheet'.
The format the web runs on. Nested objects and arrays, real types, and a syntax small enough to fit on a postcard. It maps badly onto a grid, which is why converting deeply nested JSON to a spreadsheet always involves losing something.
Your files never leave your device · no magic required
Spreadsheet rows as JSON objects, using the first row as keys. Because the .xlsx actually stores types, numbers survive as numbers here in a way they never do from a CSV.
Made in this page, on your device · or for one code per line
Drawing codes…
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Converting on your device…
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Reading the archive…
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