CSV to XLSX Converter
Options
If unchecked, the first row will be treated as data.
If checked, values like "123" or "true" will be saved as numbers/booleans. If unchecked, all data will be saved as text.
About this Tool
Effortlessly convert your CSV data into a professional Excel spreadsheet. Our browser-based tool instantly transforms your plain text data into a downloadable `.xlsx` file, ready for analysis, reporting, or sharing. No software installation required—just paste, click, and download.
This tool uses the powerful SheetJS library to parse your CSV data and map it into the cells of a new Excel worksheet. It preserves your headers and data structure, creating a clean, ready-to-use spreadsheet.
- Paste your CSV content into the input box.
- Click the 'Download .xlsx' button.
- Your browser will immediately download the generated Excel file.
- Sharing data from a database export with non-technical colleagues.
- Importing CSV log files into Excel for easier analysis and charting.
- Quickly converting a CSV report into a more professional-looking XLSX format.
- Direct CSV to XLSX Conversion: Creates a native Excel file instantly.
- Client-Side & Secure: Your data is processed entirely in your browser and is never uploaded.
- Accurate Data Mapping: Correctly handles headers and data rows.
- No Software Needed: A completely online, browser-based solution.
While CSV is a simple, plain-text format, XLSX is a more complex, XML-based format that supports features like multiple sheets, formatting, and formulas. This tool bridges that gap by converting the flat structure of a CSV into the cellular structure of a spreadsheet.
Does it support formulas or styling?
No, this tool is designed for converting plain data only. It does not interpret formulas or apply styling.
Is there a file size limit?
The tool is best suited for small to medium-sized datasets, as very large files may be limited by your browser's memory.
What encoding does it use?
It processes the data assuming UTF-8 encoding for broad compatibility.
All calculations and data processing for this tool are performed locally in your browser. We do not send any of your data to our servers, ensuring your information remains private and secure.
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