Search Ctrl K
Home / Tools
THE FEUTEX TOOLKIT

CSV to XLSX Workbook

Create a real Excel workbook from CSV, preserving identifiers and storing values safely as text.

Spreadsheets workspace● Runs in your browser
01 Your input
02 Your result

How to use this tool

  1. Choose local files or paste the sample input.
  2. Select the output options and run the tool.
  3. Review the result and download generated files.

Try this example

name,id
Ada,00123
Lin,00456

Accuracy and scope

Files are processed in browser memory. Maximum 25 MB total input and 100 files. XLSX import supports unencrypted .xlsx only and uses cached formula results. Exports contain values, not workbook formatting. CSV-to-XLSX stores all cells as text. Export limit: 50,000 rows and 200 columns. Complex workbooks may require more memory.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.