How do I convert XLSX to CSV?

Drop your Excel file (.xlsx, .xls, .xlsm, .xlsb, or .ods) onto the converter or browse to pick one. Click "Convert to CSV" to read the first sheet. If the workbook has more sheets, select another from the sheet picker and convert again. Copy the result or download the CSV.

Is my Excel file uploaded?

No. The entire conversion happens in your browser using JavaScript. Your spreadsheet is read locally and never sent to any server. The tool works fully offline once the page is loaded.

What if my workbook has multiple sheets?

After the workbook is read, the sheet picker lists its worksheets. Select a sheet and convert again to export it. Each download contains only the selected sheet; sheets are not combined or downloaded as a batch. If the first sheet is empty, choose a populated sheet from the picker.

How are dates handled?

When "Format dates as ISO" is enabled (the default), actual Excel date cells are exported as YYYY-MM-DD text. Text that looks like a date is not inferred or rewritten. Disable the option to use the workbook's date display format. ISO date output omits the time of day, so leave it off if the displayed time matters.

What file formats are supported?

XLSX (modern Excel), XLS (legacy Excel 97-2003), XLSM (macro-enabled), XLSB (binary), and ODS (OpenDocument / LibreOffice Calc). Macros are not executed. The output is a plain CSV file containing one selected worksheet.

Will formulas, formatting, and charts be preserved?

CSV stores cell values, not workbook features. Colors, merged-cell layout, charts, and formulas are not preserved. Formula cells use their saved results where available; the converter does not recalculate formulas. Recalculate and save the workbook in Excel before converting if those results may be outdated.

Excel to CSV Converter — XLSX & XLS, Free Online

Excel file

File processed locally in your browser — never uploaded.

Settings

CSV output delimiter

Skip empty rowsFormat dates as ISO (YYYY-MM-DD)

Choose an Excel file to convert.

CSV output will appear here

Drop an Excel file and click Convert

How it works

4 steps. Everything runs in your browser.

Drop file

Drag and drop an Excel file onto the upload area or click to browse.

Read workbook

Choose an output delimiter and click Convert to CSV. The first worksheet is selected initially.

Choose sheet

For a multi-sheet workbook, pick the worksheet you need and convert again. Empty sheets produce no CSV.

Copy or download

Check the preview, then copy the CSV or download the selected worksheet as a .csv file.

Why convert Excel files to CSV?

Excel's .xlsx format is great for human-edited spreadsheets — formulas, multiple sheets, charts, formatting — but it's a poor fit for data exchange between systems. Databases, ETL pipelines, and command-line tools often accept CSV: plain text, comma-separated, one row per line. Converting from XLSX to CSV strips away the Excel-specific layer and produces a portable file that is easy to inspect and import into systems that support CSV.

Your workbook is read on your device. You can export a selected worksheet without opening Excel, choose the separator required by your destination, and inspect the CSV preview. For a workbook with several sheets, download each required sheet separately.

Example: export the Orders worksheet

Suppose sales.xlsx contains an Orders sheet with columns Product, Quantity, and City. Convert the file, select Orders if needed, then convert again. With a comma delimiter, these rows become:

Product,Quantity,City
Notebook,12,Kyiv
"Pen, blue",5,Warsaw

The comma inside "Pen, blue" is quoted so it stays in one cell. If the workbook has multiple sheets, the downloaded filename includes the selected sheet name, such as sales-Orders.csv.

What to check before importing the CSV

Export one worksheet at a time. An empty worksheet needs a different sheet selection.
CSV keeps values, not colors, charts, merged-cell layout, or formulas. Formula results must already be saved in the workbook.
Check dates and formatted numbers in the preview. Reopening CSV in Excel can reinterpret text, including leading zeros.
Match the output delimiter to your destination. Comma is the default; semicolon, tab, and pipe are also available.
File uploads are limited to 50 MB. Complex workbooks can use substantial browser memory even below that limit.

Common use cases

Database import

Export business data from Excel → CSV → COPY/LOAD DATA into PostgreSQL, MySQL, BigQuery, etc.

Email lists

Marketing teams maintain contacts in Excel — convert to CSV for Mailchimp/HubSpot/Salesforce import.

ETL pipelines

Prepare a selected worksheet as CSV for a pipeline that accepts delimited files.

Command-line analysis

Use the CSV with tools such as csvkit or Miller to filter, sort, and summarize records.

Git-friendly storage

Track tabular data in version control. CSV diffs cleanly; XLSX shows up as binary churn.

API responses

Convert internal Excel reports to CSV for serving via API endpoints.

How XLSX differs from CSV

Feature	XLSX	CSV
Format	Binary (zipped XML)	Plain text
Formulas	Yes	No (formulas → values)
Multi-sheet	Yes	No (one sheet only)
Formatting / colors	Yes	No
File size (data only)	Compressed; depends on data	Uncompressed; depends on data
Database import	Depends on importer support	Commonly supported
Git diff readability	Binary blob	Line-by-line

Why use our XLSX to CSV converter?

100% private

Your spreadsheet stays on your device. Conversion runs entirely in the browser.

Multi-sheet support

Pick any sheet from a multi-tab workbook. Switch sheets without re-uploading.

Choose a delimiter

Export with commas, semicolons, tabs, or pipes to match the receiving application.

Related tools

More free converters from text2csv.com