ZippyToolkit

Spreadsheet & Data Tools

Clean, fast converters for spreadsheet and data formats. Convert CSV to Excel, Excel to CSV and JSON to CSV with previews before you download.

CSV to ExcelConvert CSV files to Excel (.xlsx) without breaking numbers or leading zeros.
Excel to CSVExport Excel worksheets to CSV with your choice of delimiter.
JSON to CSVFlatten a JSON array into CSV columns.
CSV to JSONConvert CSV rows into a JSON array of objects.

Spreadsheet & Data Tools: common questions

Why use these converters instead of opening a CSV in Excel?

Opening a CSV directly in Excel can strip leading zeros, turn long IDs into scientific notation and misread delimiters. These tools convert safely and show a preview first.

Is there a row limit?

Excel allows up to 1,048,576 rows per sheet. Within that, the practical limit is your device’s memory.

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