CSV to Excel
Convert CSV files to Excel (XLSX)
Click to upload a CSV file
Drag and drop or click to browse
About CSV to Excel
This tool converts CSV files to Excel (XLSX) format entirely in your browser. It uses the SheetJS library to parse and generate spreadsheet files. No data is ever uploaded to a server.
About CSV to Excel (XLSX) Converter
1What is it?
Convert flat CSV files into proper Excel (.xlsx) workbooks instantly. Unlike simply opening a CSV in Excel, this tool ensures that long numbers (like IDs or credit cards) are not scientifically formatted and special characters are preserved. No file upload required - secure and private.
2Use Cases
- Convert exported data for Excel users
- Prepare reports in Excel format
- Share CSV data with non-technical users
- Create formatted spreadsheets from data
- Migrate data between systems
- Format data exports professionally
?Frequently Asked Questions
Is my data secure during conversion?
Absolutely! All conversion happens in your browser using JavaScript. Your files are never uploaded to any server. You can even disconnect from the internet and the tool will still work.
How large files can I convert?
The limit depends on your browser's memory. Most browsers can handle files with hundreds of thousands of rows. For very large files (millions of rows), consider splitting the data.
What delimiter formats are supported?
The tool auto-detects common delimiters: comma (,), semicolon (;), tab, and pipe (|). You can also manually specify the delimiter if auto-detection doesn't work for your file.
Will formulas in CSV work in Excel?
If your CSV contains text that looks like formulas (starting with =), Excel will interpret them as formulas. The CSV itself doesn't contain executable formulas, just text that Excel may evaluate.