Cookie Policy

MarkStack uses only the cookies and browser storage it needs to work. We do not use advertising, tracking or marketing cookies, so there is no cookie banner to accept.

What we use

• Sign-in session cookies (strictly necessary). Set by our sign-in provider when you log in, so you stay signed in and your credits and saved results load. They are removed when you sign out or they expire.
• Theme choice (browser storage). If you pick light or dark with the header toggle, that choice is saved in your browser so the site looks the same next time. It never leaves your device.

Analytics and error reports

We may use Vercel Web Analytics to count page views and Sentry to find errors. Neither sets cookies for tracking you across sites, and error reports are stripped of cookies, request bodies and personal details before they are sent.

Your choices

You can clear cookies and site data in your browser settings at any time. Blocking the sign-in cookies means you cannot stay signed in, but the free tools that need no account keep working.

If we ever add cookies that are not strictly necessary, we will ask for your consent first and update this page. See also our Privacy Policy.