What is a CSV file?
CSV (Comma-Separated Values) is a simple file format used to store tabular data. Each line represents a row, and values are separated by commas (or other delimiters like semicolons or tabs). CSV files are plain text and can be opened in any text editor or spreadsheet application.
How do I convert CSV to Excel?
Using our converter is simple:
- Go to our CSV to Excel converter
- Upload your CSV file (drag and drop or browse)
- Review the preview and adjust options if needed
- Click "Convert to Excel" to download your .xlsx file
Why does Excel open CSV wrong? (delimiter/encoding)
Excel may misinterpret CSV files due to:
- Wrong delimiter: Some CSV files use semicolons (;) or tabs instead of commas. Our tool auto-detects the delimiter to ensure correct parsing.
- Encoding issues: Excel may not recognize special characters if the file uses UTF-8 encoding. Converting to XLSX preserves all characters correctly.
- Formatting problems: Excel may auto-format numbers or dates incorrectly when opening CSV directly. XLSX files maintain proper data types.
Does this tool upload my file?
No. All processing happens entirely in your browser. Your CSV file never leaves your device. We don't upload, store, or have access to your data. This ensures complete privacy and security for your files.
What's the max file size / row limit?
For the free in-browser converter:
- Maximum file size: 10MB
- Maximum rows: 50,000 rows
These limits ensure fast, reliable conversion in your browser. If your file exceeds these limits, you'll see a friendly message with suggestions.
How do I convert a large CSV?
If your CSV file is too large for the free in-browser converter, you can:
- Split the file: Use a text editor or command-line tools to split your CSV into smaller chunks (under 50,000 rows each)
- Filter the data: Remove unnecessary rows or columns to reduce the file size
- Wait for large-file option: We're planning to add support for larger files in the future. Stay tuned!