Convert CSV to XLSX online
Convert CSV files to XLSX online.
Accepted source formats
Available output formats
How it works
Upload
Drag and drop or select your CSV file from your device
Convert
Click "Convert" and wait a few seconds
Download
Get your converted XLSX file instantly
Common mistakes
- Using a source file of poor quality.
- Publishing without checking the final result.
- Confusing file size, dimensions and quality.
- Overwriting the original file without keeping a copy.
Pro tips
- Always keep an original version.
- Test several settings before downloading.
- Use WebP for the web when possible.
- Choose descriptive file names for SEO.
Privacy and file handling
File handling depends on the selected tool and format. For sensitive files, review the tool information before starting the operation.
Turn raw data into a table you can work with in Excel
A CSV file opens in Excel but remains plain tabulated text, without the features of a real workbook. Converting to XLSX creates a full spreadsheet file, in which columns, formulas, and formatting can then be added normally. Conversion is available on the free plan within its daily usage quota.
Avoid separator and encoding problems
Opening a CSV directly in Excel can split columns incorrectly depending on the separator originally used (comma or semicolon, depending on regional settings) or display accented characters incorrectly. The conversion handles this interpretation upfront, for a correctly structured result right from opening.
A starting point for enriching the data afterward
Once in XLSX, the file can receive formulas, conditional formatting, charts, or several sheets — features a CSV file simply can’t contain by nature. Keep the original until you have approved the result. The final format should match how you plan to use it. Convert CSV files to XLSX online.
Discover all our tools
Convert, compress, merge and edit your files in a few clicks.
Complementary tools
Guides and tutorials
Learn how to use our tools with our detailed guides.