How do I convert CSV to Excel?

Upload your .csv file to Master Merge's CSV to Excel converter and click Convert. A .xlsx workbook downloads ready to open in Excel.

What CSV delimiters are supported?

Comma, semicolon, and tab — the tool detects them automatically.

Are special characters preserved?

Yes. UTF-8 encoding ensures all characters, accents, and emoji transfer correctly.

Are my files uploaded to a server?

No. Master Merge processes every file directly in your browser using JavaScript. Nothing is uploaded, stored, or transmitted to any server. This is the most private way to handle sensitive documents online.

Is this tool really free?

Yes — 100% free with no signup, no credit card, no email, no watermarks, and no hidden limits. We do not run ads or sell data. Use it as much as you want.

CSV to Excel

Convert CSV files to Excel workbooks with proper formatting.

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CSV

Max 100MB per file · Up to 1 files

Supported Formats

CSV

Convert your CSV files to Excel (.xlsx) workbooks for free with Master Merge. Your data is properly formatted into columns and rows, ready for analysis. All processing happens locally in your browser using SheetJS.

How it works

Upload

Drag & drop or browse your files

Process

Files are processed in your browser

Download

Get your merged/converted file instantly

About Convert CSV to Excel

Master Merge's CSV to Excel converter wraps your plain CSV data into a fully formatted .xlsx workbook. Useful for opening exported data with proper Excel features like filters, formulas, and formatting.

The tool detects delimiters automatically (comma, semicolon, or tab) and preserves UTF-8 characters. The output is a standard .xlsx workbook compatible with Excel, Google Sheets, Numbers, and LibreOffice Calc.

No upload, no signup, completely free.

Why use Master Merge for convert csv to excel

Auto-detects CSV delimiters
Preserves UTF-8 characters and emoji
Standard .xlsx output
No upload — fully private
Free with no limits

Common use cases

Open exported CSV data in Excel
Add filters and formulas to flat CSV files
Prepare data for sharing with non-technical users
Convert database exports for further editing