Privacy Policy
Last updated: March 19, 2026
How WebCheck collects and uses data.
1Overview
WebCheck ("we", "our", "us") is a free website analysis tool built by Shunify. This Privacy Policy explains what information we collect when you use WebCheck at webcheck.shunify.com, how we use it, and your choices.
2Information We Collect
We collect the URL you submit for analysis. This URL is sent to the Google PageSpeed Insights API to retrieve performance metrics. We do not store analyzed URLs in any database. We do not collect your name, email, or any personally identifiable information. No account or sign-up is required to use WebCheck.
3Cookies & Local Storage
WebCheck uses browser localStorage (not cookies) to remember your language preference (EN/VI) and theme preference (light/dark). This data never leaves your device and is not sent to our servers. Google AdSense (when active) may use cookies to serve relevant ads. You can control or disable these cookies through your browser settings.
4Google AdSense
We use Google AdSense to display advertisements. Google AdSense uses cookies and similar technologies to serve ads based on your prior visits to this website and other websites. Google's use of advertising cookies enables it and its partners to serve ads to you based on your visit to our site. You may opt out of personalized advertising by visiting Google's Ads Settings at adssettings.google.com.
5Vercel Analytics
We use Vercel Analytics to understand how visitors interact with WebCheck. Vercel Analytics collects anonymized page view data including the page URL, referrer, and general device type. No personally identifiable information is collected. Data is processed in accordance with Vercel's Privacy Policy.
6Your Choices & Opt-Out
You can opt out of Google personalized ads at adssettings.google.com. You can clear localStorage preferences through your browser's developer tools or privacy settings. You can use browser privacy extensions to block analytics or ad scripts. Opting out of analytics/ads does not affect WebCheck's core functionality.
7Contact
If you have questions about this Privacy Policy, please contact us at: Shunify — webcheck.shunify.com. This policy may be updated from time to time. The date at the top of this page reflects when it was last revised.
By using WebCheck, you agree to this Privacy Policy.