Upload a CSV, Excel spreadsheet, or JSON array of objects, preview it as a table, then export it as any of the three formats — useful for developers moving data between spreadsheets and APIs.
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Premium Features & Batch Processing
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Frequently Asked Questions
Does this handle large spreadsheets?+
It works well for typical spreadsheets, but very large files (tens of thousands of rows) may take longer to process since everything runs in your browser rather than on a server.
What happens to formulas in an Excel file?+
Only the calculated values are preserved — formulas themselves are not carried over to CSV or JSON output.
Can I convert JSON that isn't a flat list of objects?+
Best results come from a JSON array of similarly-shaped objects (like API responses or database exports) — deeply nested JSON will be simplified when flattened into rows.
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