CSV to Excel Converter
Convert CSV and TSV files into formatted Excel XLSX spreadsheets. Automatically detects delimiters and encodings while keeping your data private in browser.
CSV, TSV or TXT · one file
Tips
- Comma, semicolon, and tab delimiters are detected automatically from your file header.
- Encodings such as UTF-8 and Windows-1252 or Windows-1254 are identified to prevent garbled text.
- Quoted fields with commas, line breaks, or leading zeros remain intact without data loss.
How to use it
- 1 Drag and drop your CSV or TSV file into the upload area.
- 2 Inspect the table preview to verify that columns, headers, and special characters display correctly.
- 3 Adjust the delimiter selection manually if the automatic detector separated columns incorrectly.
- 4 Click the download button to save the generated XLSX spreadsheet to your device.
What you should know
Opening CSV files directly in spreadsheet software often corrupts text because desktop apps guess character encodings based on system regional settings instead of file headers. A UTF-8 export frequently renders non-ASCII characters as mojibake, like broken accented letters or question marks. Furthermore, default imports routinely strip leading zeros from vital identifiers such as numeric SKUs, postal codes, and barcode values by coercing them into standard floating-point numbers. Converting raw CSV text into a native XLSX binary file ensures cell data types, multi-line row breaks, and international character sets remain accurately structured.
This tool parses raw CSV or TSV inputs locally in your browser, detecting delimiters such as commas, semicolons, or tabs alongside character encodings without sending data across a network. It wraps text fields properly to preserve leading zeros in product barcodes and phone numbers. If automated parsing misinterprets a custom separator, you can manually override the delimiter before export. The converter compiles a valid OpenXML XLSX workbook ready for immediate analysis. Because CSV files lack native cell styling, formulas, or multiple worksheet tabs, only tabular text values and inferred data columns are transferred.
Frequently asked questions
Why do special characters appear broken in raw CSV files?
Desktop spreadsheet programs often assume your operating system's legacy local encoding rather than UTF-8 when opening unformatted CSVs. This converter reads the true byte order and encoding automatically, preventing corrupted symbols and accented characters.
Are leading zeros preserved in barcodes and postal codes?
Yes. Columns containing numerical strings like SKUs, phone numbers, and barcodes are formatted to prevent spreadsheet applications from stripping leading zeros or converting large identifiers into scientific notation.
Is there a file size limit for converting CSV to Excel?
There is no fixed file size limit because all parsing and XLSX workbook generation occur locally within your browser's memory. Extremely large files with hundreds of thousands of rows depend only on your computer's available RAM and processing power.
Guides
Articles and format references related to this tool.
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