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7 FireFox Extensions to Explore Page Source Code

SEOs look at the source code of almost every page – I do even when I am not analyzing the page and just browsing. That’s quite natural, I’ve been looking for tools that can represent the information in a better way or allow for more valuable options to experiment with.

I personally don’t use all these extensions and don’t encourage you to. You can play with all of them on your test FireFox profile and decide which one would be useful for you:

FireFox extension Most useful feature
View Source Chart Graphically displays source structure.
JSView 2.0.5 Displays information on page external files.
HighlightAll Highlights identical elements in the code.
Html Validator Validates HTML of the current page.
View Formatted Source Shows source structure.
SourceEditor Allows to edit code and view the results.
PageDiff Compares code of several pages.

1. View Source Chart allows to view a page source code in a more handy format by highlighting its structure and tags:

* graphically displays HTML tag boundaries
* graphically defines tag nesting order, structure and hierarchy.

View Source Chart

2. JSView 2.0.5 provides a quick access to information on all page external js/css files from the context menu, from the toolbar, from the view menu, or from the status bar:

JSView 2.0.5

3. HighlightAll (as the name suggests) highlights all identical page elements in the source code and calculates their number of occurrences:


4. Html Validator adds a tiny icon to the status bar which instantly validates the code as the page loads. The addon is based on HTML Tidy.

Html Validator

You can also see the detailed validation report:

validate source

5. View Formatted Source also shows you a structured variant of the source and enables you fold/unfold block elements. It also shows which CSS rules match each element:

View Formatted Source

6. SourceEditor enables you to quickly edit the page right in your browser. This could be especially useful for creating killer screen shots for your link bait:


7. PageDiff allows to compare HTML code differences of several pages side by side:


Category Tools
Ann Smarty Brand amd Community Manager at Internet Marketing Ninjas

Ann Smarty is the blogger and community manager at Internet Marketing Ninjas. Ann’s expertise in blogging and tools serve as ...

7 FireFox Extensions to Explore Page Source Code

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