How to use CSV to Excel

Convert a CSV file to Excel (.xlsx). Use it when you need a quick result without installing a separate application.

Enter or select the information required by CSV to Excel.
Review the options before running the tool.
Check the result and copy or download it if needed.

Privacy and limitations

File processing for this tool is designed to run in your browser. Smart2Office does not intentionally upload the selected file to a Smart2Office server. Results depend on the input, browser capabilities and device memory, so review important output before relying on it.

📰 Learn More

Decide between CSV and XLSX based on the recipient and use case.

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What is CSV to Excel?

Convert a CSV file to Excel (.xlsx).

CSV to Excel is part of Smart2Office's suite of free browser-based productivity tools. It is designed to handle an everyday task that would otherwise require installing dedicated desktop software or paying for a subscription service. Open the page, use the tool, close it — nothing to set up, nothing to maintain, and nothing to pay.

The tool runs on any modern device — Windows PC, Mac, iPhone, Android phone or tablet — directly in your web browser. There is no version to update, no operating system compatibility issue, and no licence to renew.

✅ Key Features

Convert spreadsheets without installing Microsoft Office
Preserves column structure and data types
Handles large files quickly
Free alternative to paid converters

💼 When to Use This Tool

Preparing CSV exports for analysis in Excel
Converting data files for import into other tools
Sharing data across teams that use different spreadsheet software

Tips for Best Results

Ensure CSV files use UTF-8 encoding before converting to avoid character corruption.
If your CSV uses semicolons as separators (common in European locales), check regional settings first.
After converting to Excel, add column headers if they were missing from the source CSV.

Technical Details

Formats: CSV and XLSX (Excel 2007+). Processing: SheetJS 0.18 (client-side). Compatible with Excel, Google Sheets and LibreOffice Calc.

Frequently Asked Questions

Are my files uploaded anywhere?

No. All conversion uses SheetJS, a JavaScript library running in your browser. Your data never leaves your device.

What Excel formats are supported?

We support .xlsx (Excel 2007 and later). For legacy .xls files, convert to .xlsx first using Excel or Google Sheets.

Are formulas preserved in CSV-to-Excel conversion?

CSV files contain plain text values, not formulas. The converted Excel file will have the same values — formulas must be added afterwards.

Is the output compatible with Google Sheets?

Yes. The .xlsx format is compatible with Google Sheets, LibreOffice Calc and all major spreadsheet applications.

How large a CSV can I convert?

Files with several hundred thousand rows work well. For millions of rows, split the CSV into smaller chunks first.

🔒 Your Privacy & Security — Your PDF files are processed by pdf-lib, a JavaScript PDF library that runs entirely in your browser. No file data is transmitted to any server at any point. What you upload stays on your device. Smart2Office does not track what you process, does not store output files, and does not share your data with third parties. What you create belongs entirely to you.

📊 CSV to Excel