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CSV to Excel

Leading zeros, dates and long numbers kept as text where Excel would mangle them.

More free conversions, where you upload. The Fylane extension does the same work inside any upload form, on its own free share every day.About the extension

How to convert CSV to Excel

  1. Drop the file.
  2. Nothing to choose.
  3. Press Convert and download.

What happens to your file

LibreOffice Calc reads the CSV (comma or tab, quoted fields, UTF-8) on Fylane’s servers and writes an XLSX with one sheet and one cell per value. Numbers and dates are recognised as Calc would recognise them; text stays text.

A CSV with a semicolon or another separator is read as best as it can be; the result says so if columns did not split.

Questions

Why does Excel break my CSV but this does not?

Excel guesses the encoding and the separator from your locale; this reads UTF-8 and the standard comma, quotes included, and writes a real workbook so Excel has nothing left to guess.

Do this in code

curl -X POST https://api.fylane.dev/v1/jobs \
  -H "Authorization: Bearer $FYLANE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "file_id": "<file id>",
    "operation": "convert",
    "options": {
      "to": "xlsx"
    }
  }'

The same operation, convert — Documents into another document format: Office, text and HTML to PDF by default, or by `to` into docx, odt, rtf, txt, html, xlsx, ods, csv, pptx, odp, md or epub (Markdown and EPUB through pandoc). Images to WebP. Upload first with the quickstart; every option is on the operations page. 500 free credits a month, then $5 per thousand.