CSV to Excel
Convert CSV files to Excel spreadsheets online with delimiter detection and data preview. Free CSV to XLSX converter for easy export.
Upload CSV File
Click to browse or drag & drop
Paste from Clipboard
Click to paste CSV data from clipboard
Options
About CSV to Excel Converter
The CSV to Excel converter transforms comma-separated value files into Microsoft Excel (.xlsx) spreadsheets directly in your browser. Upload a CSV file, paste CSV text, or read data from your clipboard, preview the parsed data in a table, and download a fully formatted Excel workbook.
Powered by the SheetJS (xlsx) library, this tool handles standard CSV formats including quoted fields, embedded commas, multi-line values, and various delimiters. No data leaves your device -- all processing happens client-side.
Features
Auto-Detect Delimiter
The tool automatically detects whether your CSV uses commas, semicolons, tabs, or pipes as delimiters. You can also override the detection manually.
Data Preview
Preview the first 20 rows of your parsed data in a formatted table before converting. Verify column alignment and header detection before downloading.
Custom Sheet Name
Set a custom sheet name for your Excel workbook instead of the default "Sheet1". Useful when organizing data across multiple files.
Multiple Input Methods
Upload a .csv file, paste text directly into the editor, or use the clipboard paste button for quick data import from any source.
Header Row Detection
Toggle whether the first row should be treated as column headers. Headers are displayed with bold formatting in the preview table.
Privacy First
Your CSV data is never uploaded to any server. The entire conversion process runs locally in your browser using JavaScript, keeping your data private and secure.
When to Convert CSV to Excel
Sharing Data with Non-Technical Users
Excel files are universally recognized and easier to open than CSV for most business users. Convert CSV exports from databases or APIs into Excel for colleagues who prefer spreadsheet interfaces.
Adding Formatting and Formulas
CSV files are plain text and cannot contain formatting, formulas, or charts. Converting to Excel lets you add cell formatting, conditional highlighting, pivot tables, and calculations.
Data Analysis and Visualization
Excel provides powerful built-in tools for sorting, filtering, charting, and analyzing data. Convert your CSV data to Excel as the first step in a data analysis workflow.
Frequently Asked Questions
What is the maximum file size supported?
Since processing happens in your browser, the limit depends on your device's available memory. Most modern browsers handle files up to 50-100 MB without issues. For very large files, consider splitting them first.
Does it preserve data types?
The converter writes all values as text. Excel will automatically detect and convert numbers, dates, and other types when you open the file. This ensures no data loss during conversion.
Can I convert CSV with special characters or Unicode?
Yes. The converter reads files as UTF-8 text, so accented characters, CJK characters, emoji, and other Unicode content are fully supported in both the preview and the Excel output.
How to Use CSV to Excel
Open CSV to Excel
Navigate to CSV to Excel in your browser.
Upload your file
Click the upload area or drag and drop your file. It will be processed locally in your browser.
Configure settings
Adjust any available options such as quality, format, or output preferences.
Download the result
Once processing is complete, click Download to save the output file to your device.
Frequently Asked Questions
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