What we collect, and what we don't.

What we collect

We do not collect, log, or transmit your prompt content. Tokenization runs entirely in JavaScript on your browser — for inputs longer than 50,000 characters, in a Web Worker on your browser. There is no server endpoint on this site that receives prompt text.

The only serverless function on the site is /api/og, used to render social preview images. It accepts two short query strings (a title and a subtitle) that are rendered into the preview image; it does not accept or process prompt text.

Analytics

• Vercel Web Analytics records page views and a small set of custom events (e.g. when the calculator runs, with the chosen model and a token-count bucket like <1k or 10k-100k). Event payloads never include prompt content.
• Microsoft Claritymay record anonymized session replays. The prompt textarea and the cost totals on the result card are tagged for masking, and the project's Clarity dashboard is set to “Mask all text.” Recordings show the structure of how the page is used (clicks, scroll, viewport size) but obscure the prompt content and cost amounts. You can opt out by enabling Do Not Track in your browser or by blocking *.clarity.ms.

Cookies and storage

The site itself sets no cookies. Vercel Analytics and Microsoft Clarity may set first-party cookies for session correlation. If we later enable advertising (currently disabled), the ad provider may set additional cookies; we will update this page when that happens.

The Saved scenariosfeature stores the prompts you explicitly save in your browser's localStorage. They never leave your device. You can delete them at any time from the Saved scenarios panel on the calculator, or clear your browser's site data.

Third parties

• Vercel hosts the site and serves all assets.
• Microsoft Clarity provides anonymized session replay.
• Ad providers(Google AdSense or MediaVine) — currently disabled. When enabled, see the provider's privacy policy for details on how their ad personalization works.

Data retention

Because we do not collect prompt content, there is nothing to retain. Aggregate analytics retention is governed by the third-party providers' defaults (Vercel: 12 months; Clarity: 13 months at time of writing).

Verify it for yourself

The Verify privacy panel on the calculator shows live counters for outgoing requests, cookies, and localStorage keys. Open DevTools → Network and type into the calculator: no request body should ever contain your prompt text.

Contact

For privacy questions, email hello@tokenmath.dev.