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Turn an array of objects into a spreadsheet, or a spreadsheet into JSON — with the separator, the header row and type conversion under your control. Quoted commas, quotes and line breaks survive, because the parser follows the actual specification.
Paste an array of objects — one object per row.
Paste into the editor or open a file — everything you add stays in this tab, and you see exactly what the tool will work on before anything runs.
Your browser does all the work locally. Nothing is uploaded — what you paste never leaves this tab, so there’s nothing for anyone to store, scan, or leak.
Take the result to your clipboard or save it as a file. Close the tab and nothing of what you pasted remains.