Privacy Policy

Render Size Checker is a free, open-source Chrome browser extension built for technical SEO professionals and web developers. It analyzes the rendered HTML size of the page currently open in your browser and alerts you when it exceeds 2 MB (2,097,152 bytes)— the threshold at which Google’s crawler (Googlebot) may truncate or ignore content during indexing.

Because all analysis happens directly inside your browser, Render Size Checker does not collect, store, transmit, or share any of your personal data or browsing activity. This policy describes the limited information the extension interacts with and explains your rights.

To measure render size, the extension reads the following data locally on your device — nothing is sent to any external server:

• Rendered DOM content — the extension reads the document.documentElement.outerHTML of the active tab to calculate its byte size after the browser has finished rendering the page.
• Page URL— the current tab’s URL is read solely to display it alongside the size result in the extension popup. It is never stored or transmitted.

The extension does not access:

• Cookies, passwords, or form data.
• Browser history or bookmarks.
• Any data from other tabs or windows.
• Any information about you personally.

When you click the extension icon or visit a page (depending on your trigger setting), the extension:

1. Injects a content script into the active tab only.
2. Measures the byte length of the fully rendered HTML using the browser’s built-in APIs (TextEncoder or Blob).
3. Compares the result against the 2 MB limit and displays a pass/fail badge in the toolbar and a detailed breakdown in the popup.
4. Discards all data as soon as the popup is closed or the tab navigates away — nothing is persisted.

Render Size Checker stores only the following minimal data locally in your browser via chrome.storage.local:

• User preferences — settings you configure (e.g., custom size thresholds, notification preferences). These never leave your device.

No measurement results, URLs, or page content are ever persisted to local storage or any remote database.

We do not sell, rent, or share any data with third parties — because we do not collect any data in the first place. The extension has no analytics SDK, no crash-reporting service, and no advertising network integrated into it.

The extension does not make any outbound network requests on your behalf. You can verify this by inspecting the content_security_policy and permissionsfields in the extension’s manifest.json.

Chrome extensions must declare permissions upfront. Here is why Render Size Checker requests each permission it uses:

No tabs, history, cookies, or broad host permissions are requested.

This extension is a developer tool not directed at or designed for children under 13. We do not knowingly collect any information from children.

Because no personal data ever leaves your browser, your exposure to data-breach risk from this extension is minimal. The extension’s source code is available for public review. We follow Google’s Manifest V3 security guidelines, which restrict background script capabilities and enforce a strict content security policy.

If we make material changes to this policy (for example, if a future version of the extension adds a remote feature), we will update the “Last updated” date and publish the new version alongside the extension update. Continued use of the extension after an update constitutes acceptance of the revised policy.

Questions or concerns about this privacy policy? Reach out at: