CSV to Excel: free online, fast and secure
CSV files from banks, websites and apps often open in Excel with all data squeezed into one column, broken Hindi text or lost leading zeros. Converting to XLSX gives you a proper spreadsheet you can format, filter and share.
This converter detects comma, semicolon, tab or pipe separators automatically, shows a preview, and saves an .xlsx file that opens in Excel, Google Sheets and WPS.
How to use CSV to Excel
- Upload the CSV. Choose a .csv, .tsv or .txt file.
- Preview. Check the columns and row count.
- Download XLSX. Open it in Excel or Google Sheets.
Why use ConvertKaro CSV to Excel? Free, fast and secure
There are many CSV to Excel websites, but most of them upload your files, add watermarks or ask you to pay. Here is why this one is better.
100% Free
CSV to Excel on ConvertKaro costs nothing. There is no trial, no premium plan and no hidden limit, so you can use it as often as you like.
Fast results
Because nothing travels to a server, results appear almost instantly. Large files are limited only by the speed of your own phone or computer.
Secure and private
Nothing is uploaded. Sensitive files like Aadhaar, PAN, salary slips or contracts stay on your own phone or laptop the whole time.
No signup, no watermark
No account, no email and no watermark on your result. Open the page and start.
Works on every device
Designed for mobile first, so it works just as well on your phone as on a desktop computer.
Separator auto-detection
Comma, semicolon, tab and pipe files are all read correctly without settings.
ConvertKaro vs other online converters
| ConvertKaro | Typical online tool | |
|---|---|---|
| Price | Free forever, every feature | Free trial, then paid plans |
| Your files | Stay on your device | Uploaded to a server |
| Signup | Not needed | Often required |
| Watermark or ads on result | Never | Common on free plans |
| Speed | Instant, no upload wait | Depends on upload speed |
| Daily limits | None | Usually limited |
Common uses for CSV to Excel
- Opening bank and payment gateway exports
- Shopify, Amazon and marketplace reports
- Google Analytics and Ads exports
- Survey and form responses
- Database dumps
Tips for the best results
- Quoted values with commas, like "Mumbai, MH", stay in one cell.
- Merge several CSVs with Merge Excel Files.
- For a quick look without Excel, use CSV Viewer.
- Convert to JSON with CSV to JSON.
Good to know
Office and data files come in many formats. XLSX is Excel’s modern workbook format with sheets and formatting. CSV is plain text with values separated by commas, perfect for imports. JSON and XML are structured formats used by apps and APIs, and Markdown is a simple way to write formatted text. CSV to Excel converts between these formats on your device, so business data such as customer lists, invoices and sales reports never leaves your computer.
| Price | Free, no limits |
|---|---|
| Processing | On your device, no upload |
| Signup | Not required |
| Watermark | None |
| Works on | Android, iPhone, Windows, Mac, Linux |
| Category | Office & data tools |
How CSV to Excel keeps your documents and data files private
Most online converters upload your file to their server, process it there and send it back. That costs time, uses your data pack and means a copy of your file sits on someone else’s computer. CSV to Excel works differently: the page loads the tool into your browser, and your documents and data files are processed by your own phone or computer. The file never travels over the internet, so it cannot be leaked, stored or misused.
Using CSV to Excel on your phone
CSV to Excel is designed for small screens. Buttons are large, options are simple, and downloads save directly to your phone storage. On iPhone, downloaded files appear in the Files app under Downloads; on Android they go to the Downloads folder.
Who uses CSV to Excel?
Here are some of the people who find this tool most useful:
- Office staff working with Excel, Word and CSV exports
- Accountants converting reports and statements
- Developers and analysts moving data between systems
- Shop owners exporting orders and product lists
- Students and teachers preparing data for projects
Supported input: XLSX, XLS, ODS, CSV, TSV, DOCX, JSON, XML, YAML, Markdown and HTML.
Frequently asked questions
Why does my CSV open in one column?
Excel expected a different separator. Converting here detects the separator and fixes it.
Is the XLSX compatible with Google Sheets?
Yes. Upload it to Drive and open with Sheets.
How large can the CSV be?
Tens of thousands of rows work fine; very large files depend on your device memory.
Is CSV to Excel really free?
Yes. CSV to Excel on ConvertKaro is 100% free with no limits, no signup and no watermark. There is no paid version.
Is it safe to use CSV to Excel online?
It is one of the safest ways to do it, because nothing is uploaded. All processing happens locally on your device, and the files disappear when you close the page.
Does CSV to Excel work on mobile?
Yes. It works in Chrome and Safari on Android phones and iPhones, as well as on tablets and computers. No app is needed.
Is there a file size limit in CSV to Excel?
No upload means no server limit. The only limit is your device’s memory, which comfortably handles everyday files and even large batches.
Will ConvertKaro add a watermark or ask me to sign up?
No. There is no watermark, no login and no email required. Your downloaded file is exactly your result.
Does CSV to Excel work offline?
Once this page has finished loading, the tool keeps working even if your internet connection drops, because all processing happens on your device.
Related free tools
People who use this tool often need these too: Excel to CSV, CSV Viewer, CSV to JSON, Merge Excel Files, Excel to PDF.