CSV to XLSX converter
Convert CSV to XLSX for free, with no sign-up and no paywall after upload.
- Where it runs
- Our server, files deleted in 60 min
- Free allowance
- 25 files a day, up to 200 MB each
- Typical time
- Usually 5–30 seconds
- Sign-up
- Not needed
What happens to your CSV
The document is opened and saved again as XLSX. Text, styles, tables and images carry over.
This conversion runs on our server. Your file is deleted within 60 minutes, and you can delete it yourself as soon as you have downloaded the result.
How to convert CSV to XLSX
- Choose your file Tap Choose files and pick the CSV file, or drop it onto the page. You can add several at once.
- Convert to XLSX Tap Convert. The file is sent over an encrypted connection and converted on our server.
- Download Tap Download to save the XLSX file. It is deleted from our server within 60 minutes, or straight away if you tap Delete.
What is a CSV file?
Plain-text tables, one row per line. Every database, bank export and spreadsheet app understands CSV, but it keeps only one sheet and no formatting.
Excel, Google Sheets, Numbers and any text editor.
What is an XLSX file?
The current Excel format and the standard for spreadsheets, budgets and data.
Microsoft Excel, Google Sheets, LibreOffice Calc and Apple Numbers.
Questions
Is converting CSV to XLSX free?
Yes. You can convert up to 25 files a day on our server for free, each up to 200 MB, with no sign-up. The limit is shown before you upload, and we never ask you to pay to download a file you have already converted.
Is it safe to convert my CSV files here?
Yes. Files travel over an encrypted connection, are processed on our own server, and are deleted within 60 minutes. Nobody looks at them, and you can delete them yourself straight after downloading.
How long does CSV to XLSX take?
Usually 5–30 seconds. Bigger files take longer, and you can watch the progress on each file.
Can I convert CSV to XLSX on my iPhone or Android phone?
Yes. The converter works in Safari, Chrome and any modern browser. Tap Choose files, pick from Photos or Files, and download the result to your phone.
How do I open an XLSX file?
Microsoft Excel, Google Sheets, LibreOffice Calc and Apple Numbers.