1
Download the Free Extension
On ooopsai.com, click Download Free Extension. A ZIP file will download to your computer.
File name example: Ooops-SEO-Checker-Free.zip
2
Unzip the file
Right-click the ZIP → Extract All. Keep the extracted folder open — this is the folder you will load.
📁 Ooops-SEO-Checker-Free
- manifest.json ← must be here
- popup.html · popup.js · background.js
- license.js · styles.css · …
Example: C:\Users\You\Downloads\Ooops-SEO-Checker-Free\
⚠️ Do not select the ZIP file. Select the unzipped folder that contains manifest.json.
3
Open Chrome Extensions
In Chrome’s address bar, type this and press Enter:
Or use the menu: ⋮ → Extensions → Manage Extensions
4
Turn ON Developer mode
At the top-right of the Extensions page, enable Developer mode.
After enabling, you will see Load unpacked.
5
Click “Load unpacked”
Select the extracted folder that contains manifest.json.
Select this folder →
...\Ooops-SEO-Checker-Free\ ← folder with manifest.json inside
Wrong: the .zip file or a single .js file. Correct: the whole unzipped folder.
6
Done — pin and start
Ooops SEO Checker appears in your extensions list. Pin it, open it, and start your free trial (200 domains).
● Enabled · Trial 200 domains
For Premium: open the extension → Get License / Apply Premium → verify email → admin activates.