XLSX to CSV Converter
Convert Excel spreadsheets to CSV online for free. Extract raw data as plain-text comma-separated values. No software needed. Up to 100 MB.
Drop your XLSX file hereTap to choose your XLSX file
or
Also supports XLS and ODS • Max 100 MB
How to Convert XLSX to CSV
Upload
Drag and drop your XLSX file into the converter above, or click Choose XLSX File to browse your device.
Convert
Click Convert to CSV. Our server extracts cell data from your spreadsheet and outputs it as comma-separated values.
Download
Click Download CSV to save the file. That's it — no registration, no email required.
What is XLSX?
XLSX is Microsoft Excel's modern spreadsheet format, introduced with Office 2007. It stores data in an XML-based structure inside a ZIP archive, supporting multiple sheets, formulas, charts, conditional formatting, pivot tables, and macros.
XLSX is the standard for business spreadsheets, financial models, and data analysis. It requires Excel, Google Sheets, LibreOffice Calc, or a similar application to open and edit.
What is CSV?
CSV (Comma-Separated Values) is a plain-text format where each line represents a row and values within a row are separated by commas. It contains no formatting, no formulas, no charts — just raw data.
CSV is the universal data exchange format. Every programming language, database, spreadsheet app, and data tool can read CSV files. Its simplicity makes it the go-to format for data imports, exports, and migrations.
XLSX vs CSV: Quick Comparison
| Feature | XLSX | CSV |
|---|---|---|
| Format type | Binary (XML in ZIP) | Plain text |
| Multiple sheets | Yes (tabs) | No (single table) |
| Formulas | Full formula support | Values only |
| Formatting | Fonts, colors, borders | None |
| Charts & images | Embedded | Not supported |
| File size | Larger (compressed XML) | Smaller (plain text) |
| Compatibility | Needs spreadsheet app | Universal (any text editor) |
| Best for | Data analysis, reports | Data exchange, imports |
When to Convert XLSX to CSV
Database Imports
Most databases (MySQL, PostgreSQL, SQLite) accept CSV for bulk data imports. Convert your Excel data to CSV for fast, clean database loading without manual data entry.
Data Processing & Scripts
Python, R, and other programming languages parse CSV natively. Convert XLSX to CSV when you need to process data with scripts, APIs, or command-line tools.
CRM & Software Imports
CRM platforms (Salesforce, HubSpot), email tools (Mailchimp), and e-commerce systems (Shopify) use CSV for bulk data imports. Convert your contact lists, product catalogs, or inventory from Excel to CSV.
Cross-Platform Sharing
Not everyone has Excel. CSV files open in any text editor, Google Sheets, Numbers, or LibreOffice — making them the safest format for sharing tabular data across different platforms.
Understanding XLSX to CSV Conversion
Our converter uses LibreOffice Calc to read your Excel file and export the first sheet as a UTF-8 encoded CSV with comma delimiters.
Preserved: Cell values, text content, numbers, and dates. The data structure (rows and columns) is maintained exactly as it appears in the spreadsheet.
Not preserved: Formulas (replaced by computed values), formatting (fonts, colors, borders), charts, images, multiple sheets, comments, and conditional formatting. CSV contains only raw data.
If your spreadsheet has multiple sheets and you need data from a specific one, open the file in Excel or Google Sheets, navigate to that sheet, and save it as a separate XLSX before uploading.
Frequently Asked Questions
=SUM(A1:A10) will contain the computed number in the CSV output. The formula itself is not preserved.