Excel to CSV Converter

Convert an Excel sheet to a clean UTF-8 CSV, with calculated values rather than formulas, ready for an import.

  • Free, no watermark
  • No account needed
  • Nothing is uploaded

XLSX CSV

Runs in your browser

Drop your XLSX files here

or

Google Drive import is not available yet. Choose a file from your device.

Accepts .xlsx, .xls, .ods. Up to 100 MB per file, 20 files at a time.

Options

At a glance

Accepts
.xlsx .xls .ods
Produces
CSV
Files at once
Up to 20
Size limit
100 MB per file
Runs
In your browser

How it works

How to convert XLSX to CSV

  1. Add your XLSX files

    Drag them onto the panel above, or press Choose Files. Accepts .xlsx, .xls, .ods.

  2. Press Convert to CSV

    Your browser does the work. A progress bar tracks it, and nothing is uploaded at any point.

  3. Download your CSV files

    The result appears with its new size. Take the files one at a time or the whole set as a ZIP.

What an importer needs

Most import tools want one flat table with a single header row. A workbook full of merged cells, formulas and multiple sheets is not that. Converting writes the calculated value of every cell, so a total that was a SUM formula arrives as the number itself.

Sheets and formatting

Pick which sheet to export, or convert them all and get one CSV per sheet. Formatting is not part of CSV by definition, so colours, fonts and column widths are dropped, and dates are written in ISO form so they sort correctly and cannot be misread as month first or day first.

XLSX to CSV: common questions

Which sheet gets converted?

The first sheet by default. You can choose a different one, or export every sheet as its own CSV and take them together as a ZIP.

Are formulas kept?

No, and that is deliberate. CSV cannot hold a formula, so the calculated result is written instead, which is what an import expects.

What happens to merged cells?

The value lands in the first cell of the merged range and the rest are left empty, which keeps every row the same width.

Are older .xls files supported?

Yes, along with OpenDocument .ods spreadsheets from LibreOffice.

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