CSV to XLSX

XLSX is just the OOXML file format behind modern Excel. Plotiq builds a proper .xlsx workbook from your CSV, typed cells and all — indistinguishable from Save-As in Excel.

Needed when a downstream tool insists on .xlsx, not .csv.

1. Drop a CSV file into the tool

Upload or paste CSV text. Plotiq parses it locally — no server upload.

2. Confirm auto-typed columns

The preview shows which columns will become numbers, dates, or booleans. Adjust toggles if needed.

3. Download the .xlsx

Output is a true OOXML ZIP package — Excel opens it as a real workbook, not as an imported CSV.

What's the difference between CSV and XLSX?

CSV is plain text with commas; XLSX is a compressed XML package with typed cells, formulas, styles, and multiple sheets. XLSX preserves types; CSV doesn't.

Can the CSV to XLSX tool output multi-sheet workbooks?

One sheet per conversion — CSV inherently has a single table. For multi-sheet output, combine sheets inside Excel after download.

Does the XLSX output include formulas?

No. The source CSV is values-only, so the workbook is values-only. Add formulas in Excel after opening if needed.

Is the XLSX output compatible with Excel 2007 and newer?

Yes. Plotiq uses the OOXML spec that every Excel version since 2007 supports, plus Google Sheets, Numbers, and LibreOffice.