Free · Reliable output · No signup
Convert CSV to Excel
Create a real .xlsx workbook from CSV while keeping every source cell as text.
Add as many files as you need. Up to 50 MiB per file. Keep this tab open until your downloads finish.
Batch conversion uses the standard settings. Open Customize a file below to change them.
Conversion starts as soon as you choose files. Files download automatically when ready. Your browser may ask to allow multiple downloads.
Customize a file · settings, paste and edit
CSV → Excel (.xlsx)
Free conversion in your browser. Your file stays on this device.
- Choose your CSV
Open a file, paste CSV text, or try the sample.
- Review the preview
Check the source rows; every cell is exported as text.
- Download
Save your .xlsx file with the current settings.
Source table preview
example.csv
45 B · 2 rows · 2 columns
| Project | Status |
|---|---|
| Website | Ready |
| Docs | In progress |
The downloaded XLSX contains the complete table. This preview shows the source values.
Three simple steps
How to convert CSV to Excel (.xlsx)
- 1. Open your CSV
Choose several CSV files and convert them together. For column settings, pasted text or editing, open Customize a file. The first row supplies column headers.
- 2. Review the output
Follow each file’s progress. View opens a short preview without leaving the page; use Customize a file when you need different format settings.
- 3. Save your result
Download the generated .xlsx file. Downloads start when files are ready, with a Download button for every result. No signup or payment is required.
Output contract
What the Excel (.xlsx) converter writes
The workbook contains one sheet with the CSV header and rows. Values are written as strings, preserving leading zeroes, identifiers, date text, and formula-like text instead of guessing cell types.
The preview is bounded so larger files stay manageable. Downloads use the complete parsed document within the format limits, including changes made in the editor.
Parsing and conversion happen on your device. Your CSV is not uploaded to a conversion server. An error preserves the current input so you can adjust settings or edit the source and try again.
Plain answers
Excel (.xlsx) conversion questions
Is this a real Excel (.xlsx) file?+
Yes. A format-native writer creates a valid .xlsx file, not a renamed CSV.
When is the download created?+
The output preview appears after parsing. Copy and download generate the complete output with your current settings; the preview can show fewer rows than the exported file.
What happens to data types?+
Cells stay as text by default, preserving identifiers and leading zeroes. SQL and SQLite allow explicit column types; invalid values are reported before download.