Enterno.io Site Checker

Free Chrome extension for instant HTTP status, SSL grade, and server info check. Works on any website in one click.

Download .zip (free) v1.1.0 · Manifest v3 · Chrome / Edge

What the extension checks

⚡

HTTP Status & Speed

Response code + TTFB in milliseconds

🔒

SSL Certificate Grade

A+/A/B/F grade + days until expiry

🖥️

Server & Redirect Info

Server software + redirect chain detection

🔴

Status Badge

HTTP status shown on the extension icon

🌐

Full Report Links

One-click links to SSL, DNS, Speed reports

🇷🇺

Russian / English UI

Bilingual popup with language toggle

Download the .zip file

Click the download button above and save the file to your computer.

Unzip the archive

Extract the chrome-extension folder from the zip file.

Open Chrome Extensions page

Go to chrome://extensions and enable Developer mode (top-right toggle).

Load the extension

Click Load unpacked and select the extracted chrome-extension folder.

Pin to toolbar & use

Click the puzzle icon in Chrome toolbar, find Enterno.io and pin it. Now click it on any website!

The extension works in Google Chrome and Microsoft Edge (and any Chromium-based browser). Firefox support is planned.

The extension sends only the URL/hostname to enterno.io API for the check. No personal data, browsing history, or credentials are collected.

Get full reports, uptime monitoring, SSL expiry alerts, and 40+ website tools.