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CSV to XLSX Converter

Wrap a CSV file (or pasted CSV) into a single-sheet Excel .xlsx file. Pick the delimiter, sheet name, and output filename.

Drag a .csv file here or

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How to use CSV to XLSX

  1. Drop or paste your CSV.
  2. Set sheet name and output filename.
  3. Click Build XLSX, then Download.

What is CSV to XLSX?

The reverse of XLSX-to-CSV — packages CSV data into a real .xlsx workbook compatible with Excel, Google Sheets, and Numbers. Useful when downstream systems require Excel files but you have CSV.

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FAQ

Can I add multiple sheets?
Not yet — current version creates one sheet per file. Multi-sheet support is on the roadmap.
Does this tool upload my file to a server?
No, all processing happens in your browser. Your CSV is never uploaded or sent anywhere; it stays on your device.
Can I specify the delimiter when converting CSV?
Yes, you can choose the delimiter (e.g., comma, tab) before generating the XLSX file.

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Author

SC
Sarah Chen"The Data Whisperer"

Data Analyst & CSV Specialist

Sarah has spent over a decade wrangling spreadsheets, debugging CSV exports, and teaching teams how to make data work for them.

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