Data Processing
The EU VAT Invoice Checker is a 100% client-side application. All validation and processing happens entirely in your web browser using JavaScript. No invoice data, VAT numbers, or any other information you enter is ever transmitted to any server or third party.
What We Don't Collect
- Invoice data or numbers
- VAT identification numbers
- Financial information (amounts, totals, etc.)
- Company names or business details
- Personal information
- IP addresses (beyond standard web server logs)
Cookies and Tracking
This website uses cookies for analytics and advertising purposes:
- Microsoft Clarity: We use Clarity to understand how visitors interact with our website through anonymous session recordings and heatmaps. Clarity uses cookies to track user behavior across pages, but does not collect personally identifiable information. Data collected includes clicks, scrolling behavior, and time spent on pages.
- Google AdSense: We may display advertisements through Google AdSense, which uses cookies for ad personalization. You can control ad preferences through your browser settings or Google's ad settings.
You can disable cookies in your browser settings, though this may affect website functionality and ad relevance.
Third-Party Services
This website uses the following third-party services:
- Microsoft Clarity: Analytics platform that helps us understand user behavior through session recordings, heatmaps, and engagement metrics. Clarity collects anonymous usage data including clicks, mouse movements, scrolling, and page navigation. Learn more at Microsoft Clarity Privacy Policy.
- Cloudflare Web Analytics: Privacy-friendly analytics that tracks page views and basic metrics without using cookies or collecting personal data.
- Google AdSense: For displaying advertisements. AdSense may collect data for ad targeting according to Google's privacy policy.
- Cloudflare Pages: The static website files are hosted on Cloudflare's content delivery network, but no user data is transmitted or stored.
Data Security
Since all processing happens in your browser and no data is transmitted, the security of your invoice data depends on your device's security. We recommend using up-to-date browsers and operating systems with proper security measures.
Changes to This Policy
We may update this privacy policy from time to time. Any changes will be posted on this page with an updated revision date.
Open Source
This tool is built with SvelteKit and uses only client-side JavaScript for all validation logic. The code is transparent and can be inspected in your browser's developer tools.
Last updated: December 16, 2025