Are spreadsheet files uploaded?

No. Reading and CSV creation happen locally in the browser.

What happens when a workbook has multiple sheets?

Each worksheet is prepared as a separate CSV because CSV files can contain only one table.

Free browser tool

Excel to CSV converter

Q: How do I convert a Google Sheet?

In Google Sheets, download the sheet as Microsoft Excel or OpenDocument, then select that file here.

Convert Excel workbooks and exported Google Sheets into clean CSV files. Everything stays on your device.

No uploads No account Cached locally

Drop your spreadsheet here or click to choose an Excel / Google Sheets export .xlsx, .xls, .xlsm, .xlsb, .ods or .fods · up to 25 MB Protect cells that look like formulas Adds a leading apostrophe to values beginning with =, +, − or @ for safer CSV opening.

How it works

Private conversion in three steps

Your browser reads the workbook, prepares one CSV per worksheet, and stores the result locally so opening the same file again is instant.

Select a workbook

Choose a supported Excel file, or download a Google Sheet as Microsoft Excel or OpenDocument first.

Convert locally

The file is processed on your device. New files count toward the five-conversion daily browser allowance.

Download each sheet

Because CSV holds one table, multi-sheet workbooks produce a separate, clearly named download for each worksheet.

Converter FAQ

What the tool supports, stores, and protects.

Are my files uploaded?

No. Conversion happens entirely in your browser. The local cache and daily counter are stored only in that browser.

How do I convert a Google Sheet?

Open the Sheet, choose File → Download, then select Microsoft Excel (.xlsx) or OpenDocument (.ods). Drop the downloaded file into this converter.

Does opening a cached file use another conversion?

No. If the exact same file and safety setting are still in this browser’s cache, the saved result is reused and does not use another daily conversion.

What is formula protection?

CSV apps can interpret values beginning with formula characters as commands. The default protection adds a visible apostrophe so those values stay text when opened.