CSV to Excel
Convert CSV to Excel online free. Transform CSV files to proper .xlsx spreadsheets instantly. No upload, browser-based converter, 100% free.
Drop a CSV file here or browse
Supports .csv and .tsv files
How to Use CSV to Excel Converter
- Upload or drag & drop your CSV file onto the converter area.
- Select the delimiter (auto-detect, comma, semicolon, tab, or pipe) and choose whether the first row is a header.
- Click "Download as Excel (.xlsx)" to save your converted spreadsheet.
Features
- Auto-Detect Delimiter - automatically identifies comma, semicolon, tab, and pipe delimiters.
- Live Preview - inspect your parsed data before converting to catch any issues.
- Proper XLSX Output - generates a real .xlsx file compatible with Excel, Google Sheets, and LibreOffice.
- 100% Browser-Based - your files never leave your device. No upload, no servers, complete privacy.
Why Use Our CSV to Excel Converter
Our free online CSV to Excel converter delivers instant, accurate transformations without compromising your data privacy. Unlike cloud-based alternatives, all processing happens locally in your browser so sensitive spreadsheets never leave your computer. The auto-delimiter detection handles messy CSV exports from any source, while the live preview ensures your data is parsed correctly before download. Whether you are a data analyst cleaning datasets or an office worker reformatting reports, this tool provides a fast, reliable XLSX conversion in seconds.
FAQs
Can I convert large CSV files?
Yes, the converter handles large CSV files efficiently. Since everything runs in your browser, performance depends on your device's memory. For extremely large files (100k+ rows), we recommend a modern browser like Chrome or Edge.
What delimiters are supported?
Our tool supports comma (,), semicolon (;), tab, and pipe (|) delimiters. The auto-detect feature intelligently identifies the correct delimiter from your file, so you rarely need to select it manually.
Is my data safe when converting CSV to Excel?
Absolutely. All processing is done locally in your browser using JavaScript. No files are uploaded to any server, and your data never leaves your device.