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In-memory processing
Excel to CSV runs as JavaScript inside this tab.
Never uploaded
Safe for financials, contracts and NDAs.
No caps or sign-ups
File size is limited only by device memory.
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Convert Excel to CSV when you need to import spreadsheet data into a database, CRM, accounting package or script. CSV drops formatting and formulas and keeps the cell values, which every data tool understands.
Also known as XLSX to CSV.
The first sheet of the workbook is converted to CSV. Formulas are exported as their calculated values, and formatting such as colours and merged cells is removed, because CSV can only store plain values.
Yes. Excel to CSV runs entirely inside your web browser using JavaScript, so the file never leaves your device. It is safe for confidential documents such as contracts, financial records and IDs.
There is no fixed limit, because the file is processed on your own device. Very large files depend on your device's available memory; a modern laptop or phone handles hundreds of megabytes.
Yes. ZapConvert runs in any modern browser, including Safari on iPhone and iPad and Chrome on Android, with nothing to install. You can add several files at once and download them together as a ZIP.