Drop in an .xlsx workbook, choose the worksheet and set the target format to JSON. The first row becomes the keys, every following row becomes one object, so a price list or a system export turns into a JSON array your app can read directly.
Empty cells come out as null instead of empty text, two columns with the same header are renamed so no key is lost, and numbers stay numbers. Need one object per line for a log file or a bulk import? Switch on NDJSON. The workbook is parsed in your browser, so nothing is uploaded.
Convert between XLSX, CSV, TSV and JSON, right in your browser.
Reading and writing happen in your browser. Formulas keep their last calculated value, and styling, charts and images are not written to the output.
How it works
This utility runs locally in your browser for privacy and speed.
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Unlimited local toolsThis run costs 1 credit(s) and is saved to your history automatically.
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JSON to CSV Converter
Turn a JSON array into a CSV file in your browser: paste the JSON or drop a .json file, pick the delimiter, and download the table. Nothing is uploaded.
CSV to Excel Converter
Turn a CSV or TSV file into an Excel .xlsx workbook in your browser: pick the delimiter and download the file. Your data is never uploaded.
Excel to CSV Converter
Export an Excel worksheet to CSV in your browser: pick the sheet and the delimiter, then download the .csv file. Nothing is uploaded to a server.
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