The short version
No accounts, no tracking pixels, no selling data. All calculations run locally in your browser. Saved tools, recent tools, theme, and last-used inputs are stored in your browser's local storage on this device only — clear them any time from the shelf's “clear” button or your browser settings.
What leaves your device
Only standard web requests: the pages, styles, scripts, and fonts you download, and optional, aggregated analytics that never include your inputs or results. Shared links contain your inputs in the URL — share them only if you want the recipient to see those values.
Changes
If this policy materially changes, the updated date below changes with it. Last updated: 2026.