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cubdomaincubdomain

Check any website without leaving it.

The free CubDomain extension shows SSL, WHOIS, DNS, server location and safety checks for the site you're on — in one click from your toolbar.

Add to Chrome — it's freeFirefoxEdgeOperaBrave
Illustration — sample data

Everything in the popup

Website info

Registration, IP and hosting at a glance.

SSL & WHOIS

Certificate status and registration details.

DNS records

A, MX, TXT, NS and more for the current site.

Server location

Where the site is hosted, on a map.

HTTP headers

The response headers the site sends.

Is it safe?

Verdicts from Google Safe Browsing, Norton, McAfee, Bitdefender, Yandex and WOT.

  1. 01

    Install

    Add it from your browser's store — it takes a few seconds.

  2. 02

    Pin it

    Pin CubDomain to your toolbar so it’s always one click away.

  3. 03

    Click on any site

    See the site's details instantly, or open the full report.

Privacy

The extension only runs when you click its icon. It reads the address of the tab you're on and asks CubDomain for that site's report. If you ask it to detect the site's technologies, it reads that page and sends us the domain, the page address, the technologies it found and your browser's user agent, which we use to improve our technology data.

It doesn't run on pages in the background, and it doesn't collect your browsing history.

Read the privacy policy →
Is the extension free?

Yes — it's free, with no account needed.

Which browsers does it work on?

Chrome, Edge, Opera and Brave from the Chrome Web Store, and Firefox from Firefox Add-ons.

Does it slow my browser down?

No. It only runs when you click its icon (or press Ctrl+Shift+C); it does nothing on the pages you visit until then.