Free browser-based spreadsheet tool
CSV to Excel Converter Online
Convert CSV to Excel XLSX online for free. Upload or drag and drop a CSV file, preview rows, set an Excel sheet name, style headers, auto-size columns, and download a clean XLSX spreadsheet with fast browser-based processing.
Convert CSV to Excel XLSX
Upload a CSV file, preview rows, choose Excel options, and download a clean XLSX spreadsheet.
Upload CSV file
Drag and drop CSV here
Or click this area to choose a CSV file from your device.
Supported file type: CSV • Maximum file size: 10 MB
Excel output settings
CSV Preview
How to use CSV to Excel Converter Online
Upload your CSV file
Click Upload CSV or drag and drop a CSV file into the upload area. You can also load the sample CSV to test the converter.
Review CSV preview
Check the detected rows, columns, file size, and preview table before creating the Excel file.
Set Excel output options
Enter an output file name, choose an Excel sheet name, enable header styling, and turn on auto-width columns if needed.
Download XLSX file
Click Download Excel File to convert CSV to Excel and save the XLSX workbook to your device.
Review before sharing
Open the downloaded Excel file and review formatting, data, rows, columns, and sheet name before sharing or submitting it.
Use the sheet name field to name the Excel tab, such as Sales Report, Employee Data, Bank Statement, or Export Data. Excel sheet names are limited, so invalid characters are cleaned automatically.
Enable style header row when your first CSV row contains column names. Enable auto-size columns to make the downloaded XLSX easier to read in Excel, Google Sheets, or LibreOffice.
Convert CSV to Excel XLSX
Turn CSV exports into Excel workbooks for reports, office work, analysis, cleanup, sharing, and spreadsheet-based workflows.
Preview before download
Check detected rows, columns, headers, file name, and preview rows before creating the final Excel file.
Clean Excel output options
Set an output file name, customize the sheet name, style the header row, and auto-size columns for a cleaner XLSX file.
Popular use cases
- Convert app exports and database exports into XLSX files.
- Prepare office reports, MIS files, statements, and records.
- Share CSV data with users who prefer Microsoft Excel.
- Preview downloaded CSV data before analysis or cleanup.
- Convert CSV files for invoices, reports, online submissions, and team sharing.
Best tips for CSV to Excel conversion
- Review the preview table to confirm columns are detected correctly.
- Use a clear sheet name for reports and monthly exports.
- Enable auto-width columns for better readability in Excel.
- Keep the original CSV safe; the converter creates a new XLSX file.
- Open the downloaded Excel file once before submitting or sharing it.
Frequently Asked Questions
Is this CSV to Excel converter free?
Yes. SmartTools CSV to Excel Converter is free to use online with no signup required.
Does this CSV to Excel converter create XLSX files?
Yes. It converts your CSV data into an Excel XLSX workbook that you can download.
Does this tool upload my CSV file?
The converter is designed for browser-based processing, so your CSV file is read and converted in your browser with no unnecessary upload delay.
What file type is supported?
This tool supports CSV files with the .csv extension or text/csv file type. The maximum file size shown in the tool is 10 MB.
Can I preview the CSV before downloading Excel?
Yes. After uploading a CSV file, you can preview rows and check row and column counts before downloading the XLSX file.
Can I set a custom Excel sheet name?
Yes. You can enter a custom sheet name before downloading the Excel workbook. Invalid Excel sheet name characters are removed automatically.
Can I style the header row and auto-size columns?
Yes. The tool includes options to style the header row and auto-size columns for cleaner Excel output.
Will my original CSV file change?
No. Your original CSV file remains unchanged. The tool creates a new XLSX file for download.
Important note
Review the Excel output before sharing, printing, uploading, or using it in official records. CSV formatting can vary between systems, and some files may use unusual delimiters, encodings, or broken rows. This tool creates a new XLSX file and does not change your original CSV.
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