ExcelCompare

Free CSV to Excel Converter

Convert your CSV files to Excel format instantly — free, private, and 100% browser-based.

Max 100 MB
All processing happens in your browser. No data is uploaded.

CSV

Comma-Separated Values. A plain text format for tabular data. Each row is a line, and columns are separated by commas. Universally compatible with spreadsheets, databases, and programming languages.

.csv

Excel

Microsoft Excel Worksheet (XLS/XLSX). A spreadsheet format that stores data in cells organized by rows and columns. Supports formulas, formatting, and multiple sheets.

.xls.xlsx

How to Convert CSV to Excel

Three simple steps to convert your CSV files to Excel format

Step 1

Upload CSV File

Drag and drop your .csv file onto the upload area, or click to browse your files.

Step 2

Auto-Convert

Your file is automatically converted from CSV to Excel format right in your browser.

Step 3

Download XLSX

Click the download button to save your converted Excel file to your device.

Frequently Asked Questions

Upload your .csv file using the button above, then click Convert. Once the conversion is complete, click Download to save the XLSX file to your device.
Yes, completely free with no usage limits, no account required, and no hidden fees. Convert as many files as you need.
Your data never leaves your device. All conversion happens locally in your browser using JavaScript. We do not upload, store, or process your files on any server.
This tool accepts standard .csv files (comma-separated values) and converts them into .xlsx format (Microsoft Excel 2007+). The output is a fully compatible Excel spreadsheet.
Yes. The converter correctly handles UTF-8 encoded CSV files, including special characters, accented letters, CJK characters, and emojis. Your data is preserved exactly as-is in the Excel output.
There is no strict file size limit. Since the conversion runs entirely in your browser, performance depends on your device. Files up to 100 MB are generally handled smoothly.
No installation required. This tool runs entirely in your web browser. Just open the page and start converting your CSV files to Excel.
CSV is a plain text format where each row is a line and values are separated by commas — it stores only raw data. XLSX is a Microsoft Excel format that supports formulas, formatting, multiple sheets, charts, and cell styling. Converting CSV to XLSX lets you use all of Excel's features on your data.
CSV to Excel Converter — Free Online Tool | CSV to XLSX