Free Online Excel to CSV Converter

Convert Excel (XLSX) to CSV online for free. Export spreadsheet data as comma-separated values. Fast, secure — no signup, no software to install.

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

XLSX → CSV is the "get this data out of Excel into something else" conversion — importing to a database, a Python pandas notebook, a marketing tool, or another SaaS. Only exports one sheet at a time; multi-sheet XLSX workbooks need one conversion per sheet. Loses formulas (values only), formatting, and 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

XLSX to CSV FAQ

Quick answers about compatibility, quality, metadata handling, and the most common reasons to convert XLSX files to CSV.

How to convert XLSX to CSV without losing formulas or data

Upload your XLSX spreadsheet to iFormat and click Convert. 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

iFormat converts XLSX 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 makes the file easier to open, share, or upload where XLSX is not supported.

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.