Free SEO Tools

Sau đây là một số các Tools SEO dùng hoàn toàn miễn phí.

1. Alexa ranking

   http://www.alexa.com/

2. W3C markup Validation Service

   http://validator.w3.org/

3. Collections of Tools

   http://www.seomoz.org
   http://www.internetmarketingninjas.com/tools/

   Keyword Combination Tool
   http://www.combinewords.com/

4. Search Engine Rankings

   Free rank tracker
   http://www.rankerizer.com

   Dogpile shows search results from 3 top search engines: Google, Yahoo, Bing
   http://comparesearchengines.dogpile.com/

   Google + Yahoo + MSN + Ask Jeeves
   http://tools.seobook.com/authority-finder/myriad.php

5. Domain Helper Tools

   Domain name research, including comprehensive Whois Lookup, Reverse Whois Lookup and Whois History
   www.domaintools.com

   Class C Checker tool allows you to check if some sites are hosted on the same Class C IP Range.
   http://www.webrankinfo.com/english/t…-c-checker.php

6. Keyword tools

   Google Keyword Tool
   https://adwords.google.com/select/KeywordToolExternal

   Keyword Research Tool
   http://www.webmaster-toolkit.com/key…rch-tool.shtml

   WordStream’s Keyword Suggestion Tool
   http://www.wordstream.com/keywords

   Google Related Searches + Yahoo Related Searches + Wordtracker Keyword Suggestion + Combined List
   http://www.seo-watch.org.uk/tools/ke…ion-generator/

7. Site Optimization Tools

   Screaming Frog SEO Spider Tool( The ‘Lite’ FREE versionis limited to crawling a maximum of 500 URI )
   http://www.screamingfrog.co.uk/seo-spider/

   Searches for copies of your page on the Web.
   http://www.copyscape.com/

8. Backlinks checkers

   http://www.majesticseo.com/

   Open Site Explorer
   http://www.opensiteexplorer.org/

9. Site analytics

   Free Open Source Piwik and Google Analytics

10. Other

    With Google Insights for Search, you can compare search volume patterns across specific regions, categories, time frames and properties
    http://www.google.com/insights/search/

    Xml site generator
    http://www.xml-sitemaps.com/

11. Great tool for bulk checking page rank of pages
    http://www.bulkseotools.com/bulk-check-pagerank.php

    Page analyzer
    http://www.ranks.nl/tools/spider.html

    Keyword density tool
    http://tools.davidnaylor.co.uk/keyworddensity/