Convert CSV to Excel
Ethical Tube's free CSV to Excel converter converts CSV files into Excel (XLSX), Microsoft Excel's spreadsheet format, with a preview you can copy. It runs entirely in your browser, so your files are never uploaded, and it's free with no sign-up or watermark.
Files are converted on your device and never uploaded.
- Price
- Free
- Uploads
- None, it runs on your device
- Sign-up
- Not needed
- Batch
- Unlimited files
- Output
- Excel with a preview
- Install
- Nothing to install
How it works
How to convert CSV to Excel
Add your CSV files
Drop CSV files onto the converter, click to choose them, or paste from the clipboard. Add as many as you like.
Check the settings
Excel is already selected. The result appears in a preview you can copy, or download it as a file.
Download your Excel spreadsheets
Copy the result from the preview, or download it. With several files, Download all saves them in one ZIP file.
The formats
CSV and Excel at a glance
What is a CSV file?
CSV stores a table as plain text, one row per line, with commas between the columns. Almost every spreadsheet, database, and analytics tool can import and export it, which makes it the default format for moving data between systems. It has no formatting, formulas, or multiple sheets. It opens in Excel, Google Sheets, Numbers, LibreOffice Calc, any text editor, and practically every database and programming language.
What is an Excel file?
XLSX is the workbook format Microsoft Excel has used since 2007. A workbook can hold several sheets with formulas, formatting, charts, and filters, and it's the standard way spreadsheets are shared at work. It opens in Microsoft Excel, Google Sheets, Apple Numbers, LibreOffice Calc, and WPS Office.
Good to know
What changes when you convert CSV to Excel
- The first row is used as column names, and the delimiter is detected automatically, so semicolon-separated files from European versions of Excel work too.
- Numbers become real Excel numbers, so formulas and sorting work on them. Everything else is stored as text.
- Very large files, in the hundreds of megabytes, may be slow, and the preview shows only the beginning.
FAQ
Questions, answered
Is this CSV to Excel converter free?
Yes. It's completely free, with no sign-up, no watermark, and no limit on how many files you convert. It costs Ethical Tube nothing to run, because the conversion happens on your own device rather than on a server.
Are my files uploaded anywhere?
No. The conversion runs inside your browser with open-source CSV, JSON, YAML, XML, and Excel libraries, so your files never leave your device. Once the page has loaded, it even works offline.
Can I paste CSV instead of uploading a file?
Yes. Paste CSV text onto the page and it's converted the same way. Nothing you paste leaves your browser.
Can I convert several CSV files at once?
Yes. Add as many as you like. They're converted one after another, and you can download each Excel file as soon as it's ready or all of them in one ZIP file.
Does it work on iPhone, Android, Mac, and Windows?
Yes. It works in Chrome, Edge, Firefox, and Safari, on computers and phones.
What can open an Excel file?
Microsoft Excel, Google Sheets, Apple Numbers, LibreOffice Calc, and WPS Office.
Is there a file size limit?
There's no upload limit because nothing is uploaded. The practical limit is your device's memory: everyday files are fine, and most computers handle files of a few hundred megabytes.
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