Managing search engine ranking is much easier with the right browser extensions. There are many search engine optimization plugins available for a variety of browsers, putting free SEO tools right at your fingertips.

Here is a list of SEO browser extensions. There are popular SEO toolbars that pull in a cross-section of metrics. Also there are extensions for specific tasks, such as measuring page speed or identifying keywords. All of these plugins are free.

SEO Browser Extensions

MozBar. Access MozBar from SEOmoz for important SEO metrics at a glance as you surf. Easily highlight internal and external links, keywords, and more. Compare link metrics for Google, Yahoo! and Bing with search-engine-results-page overlay. Available for Chrome and Firefox.

SEO Quake. The SEO Quake extension obtains information on any site on the fly. It consists of three functional parts: SeoToolbar (requested parameters are shown in a separate toolbar in the browser), Seobar (requested parameters are shown in a separate, fully customizable toolbar with CSS, HTML block) and output of requested parameters on search engine result pages. Available for Chrome and Firefox, as well as beta versions for Opera and Safari.

SiteTrail. This extension provides site rank, site value, server location, site traffic, SEO statistics, site analytics, and more. Simply visit a website, right click anywhere on the site, and select “SiteTrail” to generate stats. Available for Firefox, Chrome, and Internet Explorer.

Meta SEO Inspector. Use Meta SEO Inspector to check the meta data found inside web pages: HTML meta tags, XFN tags, microformats, canonical attribute, and no-follow links. Available for Chrome.

Check My Links. Check My Links quickly finds all the links on a web page, and checks each one for you. It highlights which are valid and which are broken. Available for Chrome.

SEO For Chrome. This popular SEO extension for Chrome provides easy access to SEO tools. Get Google PageRank changes, backlinks checks, keyword research, social media share improvement, and more. Available for Chrome.

SEO SERP Workbench. This tool allows you to quickly check the position of multiple sites — yours and your competitors — given a keyword. Available for Chrome.

Firebug. This extension helps you monitor CSS, HTML, and JavaScript live in any web page. It can even help you see how long pages take to load and find what may be causing the slow loading times. Check your competitor’s code, and locate the tweaks and tags to boost your rankings. Available for Firefox.