Privacy Policy

Last updated: February 2026

CrossTabs.com does not collect, store, or transmit any of your data. All calculations happen entirely in your browser. Your data never leaves your device.

Data Processing

CrossTabs.com is a client-side web application. This means:

Your uploaded data files are processed entirely in your web browser
No data is sent to any server or third party
Your data is never stored on our servers because we don't have any data servers
We cannot access, view, or recover your data

Local Storage

CrossTabs.com uses your browser's localStorage to:

Remember your theme preference (light/dark mode)
Cache recently uploaded datasets for convenience (stored only on your device)

You can clear this data at any time through your browser settings.

Cookies

CrossTabs.com does not use cookies for tracking or analytics. We do not use any third-party cookies.

Analytics

By default, CrossTabs.com does not collect any analytics data. If analytics are enabled in the future, they will be privacy-respecting, cookieless, and opt-in only.

Third-Party Services

CrossTabs.com uses the following third-party services:

Google Fonts — For typography (Inter, Source Serif 4). Google may collect anonymized usage data.
Vercel — For hosting. Vercel may collect standard web server logs (IP addresses, browser type).
Sentry — For error monitoring and crash reporting. Sentry receives anonymized error data (stack traces, browser info) when application errors occur. No user data or uploaded files are sent to Sentry.
AI Services (optional) — If you choose to use the AI-powered analysis features, your crosstab summary data (not raw data) may be sent to Anthropic or OpenAI APIs for interpretation. This feature is opt-in and clearly indicated in the interface.

HIPAA & Research Compliance

Because your data is processed locally in your browser, CrossTabs.com is suitable for analyzing sensitive data including:

IRB-protected research data
Confidential business information
GDPR-protected personal data

HIPAA Notice: While your uploaded data files are processed entirely in your browser and are not transmitted to our servers, CrossTabs.com has not undergone independent HIPAA compliance certification. If you use optional AI-powered features, summary data may be sent to third-party AI providers. Organizations subject to HIPAA should evaluate their own compliance requirements before using any software tool for PHI analysis.

Contact

For privacy-related questions, please open an issue on our GitHub repository.