InfyTool
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CSV to Excel converter

CSV exports into proper .xlsx workbooks Excel opens without the import wizard — on your own device.

Excel (XLSX/XLS/ODS), CSV or JSON · converted on your device, nothing is uploaded

No size limit · files are processed on your device and never uploaded · how it works

Advanced settings (optional)
Output
Convert to

A real .xlsx workbook that opens in Excel, Google Sheets and LibreOffice.

Runs in your browser. Files are never uploaded — you can go offline after the page loads.

How to use the CSV to Excel

  1. Click “Choose Files” or drop your images into the box above. Whole folders work too.
  2. Adjust the Advanced settings if you need to, then click “Convert”.
  3. When the row shows Done, click “Download” — or “Download all” for a ZIP.

Easy to use

Drop files, pick options, download. Whole folders at once, no signup, no daily limit.

Best quality

The same engines the professionals use — SVGO, resvg, MozJPEG, libwebp, libavif — compiled to run in your browser.

Private & secure

Files are processed on your device and never uploaded. Close the tab and nothing remains anywhere.

Frequently asked questions

Why convert CSV to Excel at all?

Double-clicking a CSV can mangle it — Excel guesses encodings and date formats, and leading zeros vanish. A real .xlsx opens exactly as converted, shareable with people who live in Excel.

Other presets

Excel / CSV / JSON ConverterSpreadsheets, CSVs and JSON converted in any direction Excel to CSVWorkbooks into clean CSVs

Your files never leave your device

Most online converters upload your file to a server. InfyTool ships the actual encoders to your browser as WebAssembly instead, so processing happens inside your tab — faster for batches, and nothing to delete afterwards.

  • No upload, ever. Turn off Wi-Fi after the page loads and every tool keeps working.
  • No limits. No file-size cap, no queue, no watermark, no account.
  • Runs on your CPU. Batches use several cores in parallel; nothing is throttled.

More free tools

Need graphics to work with?

InfyTool is built by the same team as these free libraries.

InfyPNGFree transparent PNG graphics for mockups and social posts. InfySVGFree SVG designs and illustrations, ready to optimise or convert. InfyIconFree SVG and PNG icons you can open directly in these tools.