Updated 2017-03-15: Adds a quick link to the robots.txt file for the domain. (V. 4.2)
Updated 2016-07-15: This latest version include a check of the canonical tag, if it's present it checks the document.url against the rel.href and either displays the length or "Differs" if they don't match.
Update 2016-07-21: Now displays an entry in the table if the canonical directive is not present.
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Clicking on it will give you a quick overview of the on page attributes and produce an example of how the page will appear in the Google SERPs.
Given that data it's easy for you to tailor the page's title and description to create a more dynamic and clickable search engine result which should have a better click through rate than a keyword heavy title writen for the search engines and not for your audience.
I'd be grateful if you would please leave your comments and ideas on the SEO Bookmarklet page so I can continue to improve this tool.
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