स्प्रेडशीट स्टूडियो — ब्राउज़र में सूत्र

Yes — create sheets with formulas, formatting and multiple tabs. Workbooks autosave locally in your browser.

Yes — import CSV or JSON and export the same formats. Files stay on your device unless you choose a sync feature.

No — processing runs locally in your browser whenever possible. Your files and inputs do not leave your device unless a tool explicitly uses the network.