📊 CSV to Excel

Convert CSV to Excel (XLSX) — Free & Private

Turn simple CSV files into full Excel .xlsx spreadsheets. Open them directly in Microsoft Excel, Google Sheets, or any spreadsheet application. Runs entirely in your browser.

⚡ Convert CSV to Excel Now Browse All Tools

✓ Free forever✓ No upload✓ No signup✓ Instant

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Ready to convert your CSV to Excel?

100% in your browser · Full Excel format · Instant download

Start Converting →

How to Convert CSV to Excel

Open the Converter

Click "Convert Now" — opens on the Document tab with CSV selected.

Upload Your CSV

Drag & drop your CSV file or click Browse. Any CSV works.

Convert Instantly

Conversion runs entirely in your browser — no server upload.

Download XLSX

Your Excel file downloads automatically, ready to open in any spreadsheet app.

Why Convert CSV to Excel?

📊 Full Excel features — formulas, filters, charts, and formatting in XLSX
🖥️ Works everywhere — open in Excel, Google Sheets, LibreOffice
📤 Professional output — share spreadsheets instead of raw CSV files
🔐 100% private — files stay on your device, never uploaded to any server
🆓 Free forever — no watermarks, no limits, no credit card
⚡ Instant — browser-based conversion, results in seconds

Features

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100% Private

Files never leave your browser. Zero server uploads.

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Instant

Conversion completes in seconds.

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Free

No account, no fee, no watermarks. Ever.

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Batch Convert

Convert multiple CSV files to XLSX in one go.

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Full Data

All rows and columns preserved in Excel format.

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Mobile-Friendly

Works on any device — phone, tablet, desktop.

Frequently Asked Questions

Yes, completely free with no limits or watermarks. Convertlo runs entirely in your browser.

No. All conversion happens locally in your browser. Your files never leave your device.

Yes. The output is a standard .xlsx file that opens in Microsoft Excel, Google Sheets, LibreOffice Calc, and any other spreadsheet application.

Yes. All rows and columns from your CSV file are preserved in the Excel output.

Yes — enable Batch Convert mode to process multiple CSV files at once, each producing its own XLSX file.