PrivateConverted on your device — files never leave this browser.
Convert CSV, Excel & JSON
Drop a spreadsheet or data file, preview the rows, pick an output format, and download — nothing is uploaded.
CSV · JSON · Excel (.xlsx) · up to 25.0 MB · private on-device convert
Everyday Utils
Convert CSV Excel JSON online free
Move data between CSV, JSON, and Excel (.xlsx) without uploading a spreadsheet to the cloud. Pick a target format and convert on your device.
How it works
Add a CSV, JSON, or Excel (.xlsx) file.
Choose the output format.
Convert on your device and download.
Why this tool
- CSV ↔ JSON ↔ Excel
- Nothing uploaded
- Handy for exports and APIs
- Free local conversion
Frequently asked questions
Do spreadsheets get uploaded?
No. Conversion runs on your device.
Which inputs are supported?
CSV, JSON, and Excel (.xlsx).
Will formatting and formulas survive?
Expect data values — complex Excel formulas and rich formatting may not round-trip perfectly.