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Конвертиране на CSV в XLSX

Free online CSV to XLSX converter. Fast, secure, no signup required.

12.9K+ файла конвертирани

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Accepted: CSV files · Max 100 MB per file

csv xlsx

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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 — 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

  1. 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.

  2. 2
    Choose XLSX as output format

    XLSX is automatically selected on this page. You can adjust conversion settings if needed.

  3. 3
    Click Convert

    Hit the Convert button to start processing. Your file will be converted using our high-performance servers.

  4. 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** — XLSX offers improved compression and quality compared to older formats, reducing file sizes while maintaining fidelity.
  • **Reduce file size** — Converting between formats can significantly reduce file size, making files easier to share via email or cloud storage.
  • **Software requirements** — Your software or platform may require XLSX format specifically. Converting ensures full compatibility.

CSV vs XLSX — 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)

Често Задавани Въпроси

Upload your CSV file to MegaConvert.io, select XLSX as the output format, and click Convert. Your converted file will be ready to download in seconds. No software installation required.
Yes! Files up to 25MB can be converted for free, up to 3 times per day. For larger files, pay-per-use pricing starts at just $2 for files up to 100MB.
Absolutely. All uploaded files are encrypted in transit (HTTPS), scanned for viruses, and automatically deleted after conversion. We never share or access your files.
Free users can convert files up to 25MB. Pay-per-use supports files up to 2GB. Subscribers get up to 2GB with priority processing.
Simple text format for tabular data where values are separated by commas. Developer: N/A (1972).
Modern Microsoft Excel format based on Open XML standard with ZIP compression. Developer: Microsoft (2007).