FileopiaConvert Excel to CSV
Convert XLSX, XLS and ODS spreadsheets to CSV – one file per sheet. Runs in your browser.
- Upload
- Options
- Download
- ✓ 100% free
- ✓ No sign-up
- ✓ No limits
- 🔒 Files never leave your device
How to: Excel to CSV
- Select Excel files.
- Pick the delimiter.
- Download the CSV (zip if several sheets).
Many systems, from email tools to databases, import CSV. Each Excel sheet becomes its own CSV file.
Common uses
- Import a spreadsheet into a CRM or mailing tool.
- Load data into a database.
- Share data in a universal format.
Tips for best results
- Formulas are exported as their values.
CSV limitations to know
CSV stores plain values only – no formatting, formulas, colours or multiple sheets. That is why each sheet becomes its own CSV file. Formulas are exported as their calculated results, so the data stays correct even in tools that cannot calculate.
Separators and encoding
Some regions use semicolons instead of commas because the comma is the decimal separator. The output is UTF-8, which keeps accented and non-Latin characters intact when imported into databases, CRMs and email tools.
Why use Fileopia for Excel to CSV?
| Fileopia | Typical upload-based sites | |
|---|---|---|
| Files uploaded to a server | No – processed on your device | Yes |
| Sign-up required | Never | Often for bigger jobs |
| Hourly / daily task limits | None | Common on free plans |
| Watermark on output | Never | Sometimes |
| Works offline after loading | Yes, for most tools | No |
Your files never leave your device
Excel to CSV runs entirely in your browser using JavaScript and WebAssembly. Your files are read from your disk into this tab, processed in memory and saved straight back to your downloads folder – they are never uploaded to Fileopia or any third party.
- Test it yourself: once this page has loaded, switch off Wi‑Fi or mobile data and run the tool – it keeps working.
- Check the network: open your browser’s developer tools (F12 → Network) while processing; you will see no file upload requests.
- Nothing to delete: close the tab and the data is gone – there is no server copy, no retention period and no account.
Frequently asked questions
What happens to multiple sheets?
Each sheet becomes a separate CSV file, delivered as a ZIP if there are several.
Are formulas kept?
Their calculated values are exported.
Is Excel to CSV really free?
Yes. Every tool on Fileopia is 100% free with no file limits, no sign-up and no watermarks. The site is supported by unobtrusive ads.
Are my files uploaded to a server?
No. Fileopia processes your files directly in your browser using JavaScript. Your documents never leave your device, so they stay completely private.
Does it work on mobile?
Yes. Fileopia works in any modern browser on Android, iPhone, iPad, Windows, Mac and Linux.