XLSX, the Excel workbook
XLSX is the Microsoft Excel format: a workbook with one or more sheets, data types and formatting.
Strengths: It is what almost any office expects.
Limits: Other apps and databases usually ask for CSV to import data.
Data
Convert XLSX to CSV
Turn your XLSX files into CSV in seconds. Everything happens in your browser: nothing is uploaded to any server.
XLSXCSV
Drag your files here
Or paste them with Ctrl+V. They never leave your device.
Why convert XLSX to CSV?
Importing an Excel file into a database, online shop or CRM almost always requires CSV. If the workbook has several sheets you get one CSV per sheet.
Other apps and databases usually ask for CSV to import data. As CSV any spreadsheet, database or app can import it.
About the formats
CSV, tables as plain text
CSV stores a table as text: one row per line with columns separated by commas (or semicolons in some locales).
Strengths: Every spreadsheet, database and app can import it.
Limits: It has a single sheet, no formatting or formulas, and accented characters sometimes break.
How to convert XLSX to CSV
- 1Drop your XLSX files in the box, paste them or pick them from your device.
- 2Check that the target is CSV and open the options if you want to adjust it.
- 3Press “Convert” and download each CSV, or all of them in a ZIP.
Frequently asked questions
Is my XLSX uploaded to a server to turn it into CSV?
No. The XLSX to CSV conversion runs entirely in your browser, with code downloaded from this site and executed on your device. You can check it in the Network tab of the developer tools or by going offline after the page loads.
What if the XLSX has several sheets?
You get one CSV per sheet, named after the sheet, and download them together in a ZIP.
Is there a size limit?
Up to 1 GB on desktop and about 200 MB on mobile, although a huge spreadsheet may take a few seconds.
Can I convert several XLSX files at once?
Yes. Drop as many XLSX files as you like: several are converted at the same time, depending on your processor cores, and when they finish you can download each CSV or all of them in a ZIP.