Breakpane

Privacy policy

Breakpane – Responsive Design Tester · Last updated 4 November 2026

In short: Breakpane collects no personal data, has no account, no analytics and no servers, and sends nothing anywhere. Everything happens inside your browser.

Breakpane is a Chrome extension, made by Lavkush Kumar, for testing how web pages look on different screen sizes. This policy explains what the extension does with your information.

Information we collect

None. Breakpane does not collect, receive, store, share or sell any personal information, browsing history, website content or usage data. It contains no analytics or tracking code and does not load remote code.

Information stored on your device

Breakpane saves your settings in Chrome’s local extension storage on your own computer:

This data never leaves your browser. Uninstalling the extension deletes it.

Websites you test

Pages you open in Breakpane load directly from those websites in your browser, just as if you visited them yourself. Breakpane’s scripts run only inside the device frames it creates, to emulate the chosen device and to keep scrolling, clicks and typing in sync between devices. Messages between these frames stay inside the Breakpane tab. Password and file fields are never synced.

So that sites can load inside device frames, Breakpane removes frame-blocking response headers (X-Frame-Options and Content-Security-Policy) for requests made inside the Breakpane tab only. If you choose a User-Agent option, Breakpane changes that request header for the Breakpane tab only. No other tab is affected, and these rules are removed when you close the Breakpane tab.

Screenshots and recordings

Screenshots and videos are created in your browser and saved straight to your computer as downloads. They are never uploaded.

Permissions

Children

Breakpane is a developer tool and is not directed at children. It collects no information from anyone.

Changes to this policy

If this policy changes, the new version will be posted on this page with a new date.

Contact

Questions about this policy or Breakpane: hello@lavkushkumar.com