This is a categorized listing of 105 free SEO tools you can use for optimizing websites. For each category I give a short introduction about what the tools do. Most of them have an English interface and are web based.
Some tools need to be installed on a web server or a client connected to the Internet which is indicated in the introductory text or next to the link. Have fun trying out these free SEO tools!
Swiss Army Knives for SEO
- SEOmoz Page Strength SEO Tool popuri.us
- Rank Alert: Site Rank Report
- webconfs: Domain Stats Tool
- SEOcompany.ca: Website Analysis Tool
- socialmeter
- Seitwert (German)
Firefox SEO Extensions
It should come as no surprise that you need Firefox to use the following tools. Similar to the Swiss army knives above many of the Firefox extensions listed perform various SEO related tasks and allow you to check: Google PageRank, Google Category, Alexa Rank, Compete Rank, Alexa related links and backward links from Google, Yahoo!, Alexa and MSN.
Search Engine Tools
Tools available from major search engines.
Keyword Research and Analysis
These tools are useful for keyword research, keyword analysis, checking keyword frequency, and getting keyword suggestions.
- Overture: Suchbegriffe finden (German)
- MetaGer-Web-Assoziator (German)
- Keyword Datenbank mir KEI-Berechnung (German) Keyword
Datenbank (German)
Ranking Tools
Tools for checking the search engine rankings for specified keywords on your site and/or top ranking sites (keyword competition).
- Suchmaschinen Ranking (German)
Keyword Density Tools
Tools for analyzing the keyword density of web pages.
Google PageRank Tools
Tools for checking, monitoring, and predicting Google PageRank.
Backlink Checkers
Tools for checking backlinks and anchor texts found in various search engines and suggestions for linkbuilding.
Link Popularity / Link Value
Tools that measure the popularity and/or value of a link based on various criteria. Some off these tools can be embedded into websites to show off your immense popularity.
Link Tools
Tools for extracting links and searching websites for broken links.
- Xenu's Link Sleuth (Web Client)
Web Statistics and Tracking
Tools for analyzing website traffic and visitor tracking.
Crawling Test and Speed Check Tools
Tools for checking out how search engine crawlers (spiders) "view" web pages and how fast they are downloaded with different Internet connection bandwidths.
Meta Tag Tools
Tools for generating, optimizing, and extracting meta tags.
Domain Tools
Tools for retrieving data about domains, such as age and ip address, tools for finding expired domains, and domain name suggestion tools.
HTTP header viewer
Tools for viewing the HTTP header send to clients after requesting web pages.
Information on top search words by search engines, market places, news and blog aggregators, and download portals.
Misc Tools
Tools that don't fit into any of the above categories.
I tested all of these SEO tools to make sure they are useful and worth to be listed here. Did I miss a great tool? You can suggest other free SEO tools in your comments. Enjoy!
Reposting from so-expert.com
The journey of Alexa- The Web Information Company has never been a smooth one. Alexa that has been in the scenario almost from the start of the Web had seen immense growth and popularity and then a pretty morbid phase. However, it went back to the drawing board and sketched out new ways to pull back the company to steadiness. Several new innovations and changes have been made to Alexa since the time of its inception partly to stay in sync with the changing times and demands and partly to combat its competitors. As for example, till some time back the popularity of various websites was measured by the data collected from the users of the Alexa toolbar. However, the company went for a change in April 2008. Today other factors, apart from the Alexa toolbar, are also taken into account to determine the popularity and traffic of a given website. However, the point to ponder is that the “other sources” that are determinant of a websites Alexa rankings are not clearly cut out. They are vague and misty. Nevertheless, Alexa is still one of the most credible and powerful players of the web.
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