Convert XLSX to CSV Online Free
XLSX is the modern Excel spreadsheet format for data, formulas, and charts. CSV is a plain-text table format that stores rows of data separated by commas. FileConverter turns your XLSX into CSV online in seconds - free, privacy-first, and with no software to install or account to create.
Convert XLSX to CSV
CSV is already selected. Add your XLSX file to start.
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XLSX to CSV flattens a workbook into a single sheet of raw comma-separated values, ideal for importing data into databases and other systems—formulas and formatting are dropped.
What changes when you convert XLSX to CSV
Exporting XLSX to CSV flattens your workbook to a single sheet of raw comma-separated values. Formulas are replaced with their results, and formatting, charts, and extra tabs are dropped — so keep the XLSX if you still need them.
About the XLSX format
XLSX stores tabular data with formulas, multiple sheets, and formatting in an XML-based package. It is the standard for spreadsheets in Excel, Google Sheets, and LibreOffice Calc. In everyday use, XLSX is chosen for financial models and data tables and spreadsheets with formulas and charts. It opens in Microsoft Excel, Google Sheets, and LibreOffice Calc.
About the CSV format
CSV is the lowest-common-denominator format for tabular data, importable by virtually every database, spreadsheet, and analytics tool. It stores raw values only, with no formulas, formatting, or multiple sheets. In everyday use, CSV is chosen for importing and exporting data between systems and simple data tables and mailing lists. It opens in Excel, Google Sheets, databases, and any text editor.
XLSX vs CSV
XLSX is best known for supports formulas, multiple sheets, and formatting, while CSV stands out for universally importable and human-readable. Choosing between them comes down to where the file needs to go next.
Common use cases
People convert XLSX to CSV for jobs such as importing and exporting data between systems and simple data tables and mailing lists. It is especially common when a XLSX file arrives from one system but needs to work in another that standardises on CSV.
When to convert XLSX to CSV
Reach for XLSX to CSV when your destination expects CSV — for example importing and exporting data between systems and simple data tables and mailing lists. It is the right move when you receive a XLSX file but the app, website, or person you are working with cannot use it. Bear in mind that no formulas, formatting, or multiple sheets, so keep your original XLSX if you might need it again.
How to convert XLSX to CSV
- Upload your XLSX file to the converter at the top of this page - CSV is already selected as the output.
- Check the size limit shown on this page, then drag and drop or browse for your file.
- Confirm CSV is still the target format, or pick a different one from the grid.
- Start the conversion and download your CSV file the moment it is ready.
Quality tips
Digital-born XLSX files convert most predictably. Scanned pages need OCR before editable text looks perfect, and very complex layouts are worth a quick review in the destination app after converting to CSV.
Platform compatibility
The XLSX to CSV converter runs on Windows, macOS, Linux, Android, and iOS - anywhere with a modern browser, with no plugins or permissions required. Once exported, CSV opens in Excel, Google Sheets, databases, and any text editor.
File size limits
Documents up to 200MB
Troubleshooting
- If the file exceeds the limit shown below, compress images, trim video, or split archives before retrying.
- If conversion fails, confirm the extension matches the real format — renaming a file alone does not change its contents.
- Password-protected PDFs must be unlocked before conversion.
- Heavy formatting may shift slightly — allow a minute to tidy headings in Word or a similar app.
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