Free Online Excel to CSV Converter

Export a spreadsheet to plain CSV for import into another system.

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XLSX files · up to 50 MB each · 100 MB with a free account

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XLSX to CSV - Extract data from Excel for import into another system

Going the other way is about getting the numbers out of Excel and into something that will actually consume them, a database, a pandas notebook, a marketing tool, another SaaS. Two limits to plan around. Only one sheet converts at a time, so a multi-sheet workbook takes one pass per sheet. And the formulas do not come with it: you get the values they produced, without the formatting or the cell colours.

XLSX to CSV: one sheet, values only

CSV is a single table of text, so almost everything an XLSX adds has to go: formulas become their last computed values, formatting and colours disappear, charts and pivot tables are dropped, and only one worksheet survives, a workbook with twelve tabs produces one file from one tab.

Convert to feed data into a script, a database import or a system that only takes CSV. If the workbook has several sheets that all matter, export them one at a time rather than expecting a single file.

XLSX vs CSV: Side-by-side

Technical comparison of the two formats, useful for deciding which to use, or for confirming what changes during conversion.

Property	XLSX	CSV
Full name	Microsoft Excel (Open XML)	Comma-Separated Values
Year introduced	2007	1972
Developer / standard body	Microsoft	IBM (informal)
MIME type	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet	text/csv
File extension	.xlsx	.csv
Compression	ZIP-compressed XML	None
Color / data depth	N/A	N/A
Max dimensions / size	1,048,576 rows × 16,384 columns	Unlimited
Transparency	No	No
Animation	No	No
Standard / specification	ECMA-376 / ISO/IEC 29500	IETF RFC 4180
Best for	Modern Excel spreadsheets, data analysis	Data interchange, database imports, ETL pipelines

Frequently asked questions

How to convert XLSX to CSV without losing formulas or data

Upload the XLSX file and choose an output format. Between native formats (XLSX, XLS, ODS) formulas, formatting, and multiple sheets are preserved. Converting to CSV exports cell values as plain rows, formula results are kept, but formatting and extra sheets are not, by design.

Can I open my XLSX spreadsheet in Google Sheets after converting to CSV?

Yes. Convert your XLSX to CSV (XLSX or CSV) and import it into Google Sheets. XLSX preserves formulas and formatting; CSV is universal but carries only values. Google Sheets handles both natively.

How to convert XLSX to CSV online without Excel

XLSX converts to CSV online, no Excel, LibreOffice, or desktop software needed. Upload, click Convert, and download. It handles tens of thousands of rows without slowing down.

Does XLSX to CSV keep all sheets and tabs?

Between XLSX, XLS, and ODS formats, all sheets transfer intact. When converting to CSV, only the active sheet is captured, convert each sheet separately if your XLSX workbook has several tabs.

What is XLSX?

XLSX is the Microsoft Excel format, typically used for spreadsheets with formulas. Converting it to CSV produces a file that opens on systems without XLSX support.

How do I open XLSX files?

On Windows: Excel; free alternatives are LibreOffice Calc, Excel Online, or Google Sheets. On a Mac: Numbers opens XLSX, as do Excel and LibreOffice. Formulas mostly survive between apps; macros, pivot tables and conditional formatting frequently do not.