CSV to XLSX Converter β Convert Online Free
Free online CSV to XLSX converter. Fast, secure, no signup required.
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Accepted: CSV files · Max 100 MB per file
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Need to convert CSV to XLSX? MegaConvert makes it easy. Upload your Comma-Separated Values (CSV) file and get a Microsoft Excel Open XML Spreadsheet (XLSX) file in seconds β no software to install, no signup required. Whether you need this conversion for data analysis, office work / email attachments, our online converter handles it instantly. Free for files up to 25MB, with support for larger files up to 2GB.
How to Convert CSV to XLSX Online
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1
Upload your CSV file
Click the upload area or drag and drop your CSV file. Files up to 25MB are free. Larger files are supported with pay-per-use.
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2
Choose XLSX as output format
XLSX is automatically selected on this page. You can adjust conversion settings if needed.
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3
Click Convert
Hit the Convert button to start processing. Your file will be converted using our high-performance servers.
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4
Download your XLSX file
Once conversion is complete, click Download to save your new XLSX file. Free files are available for 1 hour.
Why Convert CSV to XLSX?
- **Better efficiency** β XLSX offers improved compression and quality compared to older formats, reducing file sizes while maintaining fidelity.
- **Better efficiency** β XLSX offers improved compression and quality compared to older formats, reducing file sizes while maintaining fidelity.
- **Better efficiency** β XLSX offers improved compression and quality compared to older formats, reducing file sizes while maintaining fidelity.
CSV vs XLSX β Format Comparison
| Feature | CSV | XLSX |
|---|---|---|
| Full Name | Comma-Separated Values | Microsoft Excel Open XML Spreadsheet |
| Developer | N/A | Microsoft |
| First Released | 1972 | 2007 |
| Category | Spreadsheet | Spreadsheet |
| Extension | .csv | .xlsx |
| MIME Type | text/csv | application/vnd.openxmlformats-officedocument.spreadsheetml.sheet |
Formulas, charts, and macros may not transfer to simpler formats like CSV.
About CSV Format
Simple text format for tabular data where values are separated by commas.
Full name: Comma-Separated Values
Developer: N/A (1972)
About XLSX Format
Modern Microsoft Excel format based on Open XML standard with ZIP compression.
Full name: Microsoft Excel Open XML Spreadsheet
Developer: Microsoft (2007)
Frequently Asked Questions
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