CSV to Excel
CSV → formatted .xlsx
What is CSV to Excel?
Turn a CSV paste into a clean .xlsx file with a named sheet. The delimiter is auto-detected (or pickable) and all headers + values are laid out in the same rows and columns as in the source. Useful when a non-technical colleague needs a spreadsheet rather than raw CSV, or when you're producing downloadable reports.
How do I use CSV to Excel?
- Paste CSV text into the input panel.
- Optionally name the sheet.
- Click Download .xlsx.
When should I use CSV to Excel?
CSV to Excel builds an .xlsx. If your source is already JSON rather than CSV, use JSON to Excel to skip a hop.
Can I put multiple CSVs into one Excel file?
Yes. Add multiple CSVs and each becomes a separate worksheet. Name the tabs in the list before exporting.
Does it auto-detect column types?
Yes. Numbers, dates, and booleans are detected from the first 50 rows and written with the right Excel cell type so filters and pivot tables work correctly.
Why does Excel show my text as scientific notation?
Long numeric strings (like phone numbers or IDs) get auto-coerced by Excel. Prefix them with a single quote in the CSV to force text, or set the column type explicitly before export.
Is my file uploaded anywhere?
No. Everything runs in your browser. Your files never leave your device, and there is no server component for this tool.