Perseo features

This page describes the main features of Perseus. Here you can find a small taste of what it can offer you.


Screenshot of Perseo tabs


Displays all SEO-relevant on-page elements. In one click you will have all the information you need at a glance.


Allows you to view the details and HTTP headers of all requests to reach the current page.


Lists all H1-H6 headings included on the page in a hierarchical and attractive format.


Displays the structured data included in the page in a user-friendly format. You will no longer have to navigate through the source code to detect what types it contains.


Presents the links, images, scripts and stylesheets of the page in an easy to consult way.


Provides multiple links to official documentation categorized by area of interest to facilitate the consultation of recurring topics.

Extension icon

The extension icon itself provides very useful information about the loaded page. At a glance you will know whether the page is indexable or not and also the status code returned by the request.


The ring of the Perseo icon indicates the indexability of the current page.

Not supported

Status code

On the other hand, the icon badge provides information about the status code of the request.


Use cases

Different possible use cases are described below:

Page not supported
200 OK Indexable + OK
301 Redirect Non-indexable + Redirect
Any other redirect Non-indexable + Warning
503 Service Unavailable Non-indexable + Warning
404 Not Found Non-indexable + Error
Request could not be processed Non-indexable + Error
Client redirect to 200 OK Indexable + OK
Client redirect to 200 OK canonicalised Non-indexable + OK
Client redirect to redirected URL Non-indexable + Warning
Client redirect to error Non-indexable + Error
Meta refresh to 200 OK Indexable + OK
Meta refresh to 200 OK canonicalised Non-indexable + OK
Meta refresh to redirected URL Non-indexable + Warning
Meta refresh to error Non-indexable + Error