CSV to Excel Converter

Convert CSV files to editable Excel spreadsheets (XLSX). 🔒 Client-Side Secure

Drag & Drop CSV File

Comma Separated Values (.csv)

Why use our Converter?

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100% Private

Conversion happens in your browser. Your sensitive data never leaves your computer.

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Instant Preview

Check your data before converting. Our table preview lets you see the columns and rows instantly.

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Auto-Formatting

We automatically detect numbers and dates, ensuring they are formatted correctly in the final Excel file.

How to convert CSV to XLSX?

Upload: Select or drag your .csv file into the box.

Preview: Review the data in the table to ensure it looks right.

Download: Click “Download Excel File” to save as .xlsx.

The Reliable CSV to Excel Converter

Turn your raw CSV (Comma Separated Values) files into professional, formatted Excel Spreadsheets (XLS, XLSX) instantly. While CSV files are great for storing data, they lack formatting, columns, and formulas. Converting them to Excel makes your data easier to read, analyze, and present.

Our tool runs entirely in your browser. This means your sensitive financial data, contact lists, or inventory records are converted locally on your device. We never upload or view your spreadsheets.

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Analysis Ready

Unlock Excel features like sorting, filtering, and formulas instantly.

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Fast Conversion

Process large datasets in seconds without freezing your computer.

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Secure & Private

Your data stays on your computer. Zero server uploads.

Frequently Asked Questions

How do I convert CSV to XLSX?

Simply upload your .csv file into the box above. The tool will automatically parse the data and create a downloadable .xlsx file that opens perfectly in Microsoft Excel.

What is the difference between CSV and XLSX?

CSV is a simple text format where data is separated by commas. It cannot save formatting (bold, colors). XLSX is a binary Microsoft Excel format that supports advanced formatting, multiple sheets, and formulas.

Is my data secure?

Yes, 100%. Unlike other converters that require you to upload your files to a cloud server, our tool works Client-Side. Your data never leaves your browser.

Do I need Microsoft Excel installed?

No. You can use this tool to convert the file without having Excel installed. You can then open the resulting file in Google Sheets, Apple Numbers, or LibreOffice.