Document Converters

CSV to XLSX Converter

Convert CSV data to a Microsoft Excel .xlsx file in your browser without installing Excel. Handles standard CSV with headers, quoted fields, and common delimiters, ready to open in Excel, Google Sheets, or Numbers.

File processed locally No sign-up required Instant download
Text input Excel download Browser-only

Input

CSV data

Text
CSV data
Conversion options

Document processing runs entirely in your browser; files never leave your device

Features

  • CSV → valid XLSX with header row
  • Handles commas inside quoted fields
  • Auto-detects delimiter (comma, semicolon, tab)
  • Numbers detected and stored as Excel numeric cells
  • Download as .xlsx file
  • Browser-only. No upload

How to use it

  1. Paste your CSV or upload a .csv file.
  2. Choose delimiter if auto-detection is incorrect.
  3. Click Convert.
  4. Download the .xlsx file.

Use cases

  • Converting CSV exports to Excel for stakeholder sharing
  • Preparing data for Excel pivot tables and charts
  • Moving CSV database exports to spreadsheet format

Limitations

  • Formulas, charts, and multiple sheets are not generated. Output is a single-sheet workbook with values only.
  • Very large CSV files may be slow to process in the browser.
See also

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Questions & answers

Frequently asked

Do numbers stay as numbers in Excel?

Yes. The converter detects numeric values and stores them as Excel number cells, not text strings.