ViewportKit

Capture authenticated, localhost, and staging pages

Use the ViewportKit Chrome extension when the page is visible in your browser but cannot be reached by a public cloud capture.

Authenticated screenshot tool

The screenshot path for pages behind your browser session.

Cloud capture is a good fit for public URLs. For a page behind a login, on localhost, or inside staging behind a VPN, the Chrome extension captures from the browser session that already has access and syncs the result back to your ViewportKit projects.

Open the Chrome extension guide Start a public capture Compare browser and URL capture paths

From signed-in browser tab to shared evidence

1
Install and connect the extension
Use the ViewportKit Chrome extension and sign in so captures from the browser can be associated with your projects.
2
Open the page you can already see
Navigate to the authenticated product screen, localhost route, or VPN-only staging page in Chrome. The extension works with the access your active browser session already has.
3
Capture and review the result
Start the capture from the extension, then use ViewportKit projects for history, comparison, review tasks, share links, and exports.

A practical fit for private environments

Pages that require login

Capture dashboards, account areas, and test users’ authenticated screens without making the public cloud crawler sign in to your application.

Local and staging development

Review localhost builds, preview deployments, and staging hosts that are only reachable from your development machine or network.

Keep access in the browser

The extension uses the page your browser can see. Public marketing routes remain available for cloud capture, while private-page access stays in the browser workflow.

Authenticated screenshot tool FAQ

Can I screenshot a page after signing in?: Yes. Open the page in Chrome with the required session active and start the capture from the ViewportKit extension. This is the intended path for authenticated screens.
Does this work for localhost and VPN-only staging?: Yes. The extension captures pages available to the active Chrome session, including localhost and staging pages that a public cloud service cannot reach.
Should I use this for a public website?: For public pages, use the web capture flow or the sitemap screenshot workflow. Use the extension when browser access is required, such as login, localhost, or a private network.

Need public pages captured in bulk? Start with sitemap discovery and keep the extension for pages that require your browser session.