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Free document tool · .csv to .xlsx

Convert CSV to Excel Online

Convert CSV data into an Excel XLSX workbook online with automatic column detection and private processing in your browser.

Reviewed methodologyLast checked 23 September 2026
🔒 Local browser processing
Review converted files before professional, legal or academic use. Advanced formatting can vary.

About this csv to excel tool

Turn comma-separated data into a workbook that is easier to filter, format and share. It begins only after you select a file or paste content and press the conversion button.

How to use CSV to Excel

  1. 1

    Choose a CSV file.

  2. 2

    Confirm the detected rows and columns.

  3. 3

    Convert and download XLSX.

Included conversion features

Header detection

This capability runs in the current browser session and is designed for straightforward everyday files.

Worksheet creation

This capability runs in the current browser session and is designed for straightforward everyday files.

UTF-8 data

This capability runs in the current browser session and is designed for straightforward everyday files.

Privacy and file handling

Your selected content is processed on your device. SolvePilot does not receive or store the document. Closing the page ends the working session, while downloaded output remains in your normal downloads location.

Formatting and accuracy

File formats describe content differently, so perfect visual reproduction is not always possible. Headings, paragraphs and ordinary tables are generally more portable than custom fonts, floating objects, macros, formulas or complex page designs.

Limitations of this converter

PDF to Word extracts existing text and does not perform OCR on scanned images. Spreadsheet conversion focuses on visible tabular data. DOCX conversion may simplify advanced Word features. Review important output against the original.

Important: Keep the original file and confirm converted figures, text, page breaks and formatting before submission or publication.

Frequently asked questions

Is CSV to Excel free?

Yes. It is free to use, requires no account and does not add a watermark.

Are my files uploaded?

No. Files are processed in your browser and are not sent to SolvePilot servers.

Does it work on mobile?

Yes, in modern browsers. Desktop browsers are usually more comfortable for large documents and spreadsheets.

Is the output identical to the source?

Simple content converts reliably. Advanced layouts, fonts, formulas or embedded objects may need review after conversion.

What file size should I use?

For reliable browser processing, use files below 25 MB and keep a backup of the original.