Online SEO Tools – the Ultimate Collection

All tools listed below fall under the following criteria:

1. they are all useful for SEOs;
2. they are all web-based (no desk-top ones or FireFox extensions so far);
3. they are all free.

If you know of any online SEO tools that were not mentioned here, please comment and I will update the post. I will do my best to continuously update the article to delete the tools that are no more available and add new ones.

Table of Contents:

• Backlink Analyzing Online SEO Tools;
• Keyword Research and Brainstorming Tools:
  • Keyword Brainstorming Tools;
  • Social Media Based Keyword Analyzers;
  • Online Dictionaries and Glossaries that Help with Keyword Research
• Domain Name Online Tools;
• On-Site Analysis Online SEO Tools:
  • On-page Keyword Prominence Research Tools;
  • SEO Browsers;
  • Page Size and Load Time Checkers;
  • Additional Site Diagnostics Tools;
• Search Related Online Tools:
  • Keyword Rank Checking Tools;
  • Tools that Compare Different Search Engine Results;
• Website Traffic and Demographics Report.

1. Backlink Analyzing Online SEO Tools

More backlink checkers:

• Backlink Watch (checks Anchor text);
• Domain Backlinks Checker (sorts the results based on the first- and second-level domains);

2. Keyword Research and Brainstorming Tools

Keyword Brainstorming Tools

Tools that help expand your keyword lists with synonyms, related terms and keyword phrases.

Social Media Based Keyword Analyzers

Use social media sites to explore how people use and tag your core term, its popularity and related words.

Online Dictionaries and Glossaries that Help with Keyword Research

3. Domain Name Online Tools

Dynamic Tools for Domain Name Brainstorming:

Additional domain name checkers and generators:

• DomainsBot (dynamically checks the availability of domain names for 6 TLDs: .com, .org, .net, .info, .biz, .us);
• InstantDomainSearch (dynamically and really fast checks the availability of domain names for 3 TLDs: .com, .org, .net);
• DomainNameSoup (suggests alternative terms for your core term, has a handy typo generator, adds words before and after your term);
• Suggest Name and (DotoMator) – has a fairly large database of available prefixes and suffixes that are sorted out in categories;
• NameBoy (generates the list of domain names based on your primary and secondary (optional) terms).

4. On-Site Analysis Online SEO Tools

On-page Keyword Prominence Research Tools.

Online SEO tools that help analyze keyword on-page usage.

SEO Browsers

One more great tool to see text-only version of the site: LynxView

Page Size and Load Time Checkers

Additional Site Diagnostics Tools:

• Bad Neighborhood Tool (scans external links on a page and detects ‘bad links’).
• Search engine SPAM detector (detects a few types of black-hat tricks: hidden text, doorway pages, keyword stuffing, etc).
• (Recently improved) Trifecta Page/ Site/ Power tool (allows only one search per day for non-pro SEOmoz members) – offers an exhaustive report on your site/ page power and ways to improve it.

5. Search Related Online Tools

Keyword Rank Checking Tools

Online tools that check any term(s) rankings across various search engines.

Most valuable rank checkers:

Note: the tools may be checking different data centers, so the results can be slightly different from tool to tool.

More rank checking tools:

• Search Engine Keyword Tracker & Keyword Ranking Tool;
• Ventio Google Position;
• SEOChat Keyword Position Check;
• Searchenginegenie Rank Checker;
• Mike’s Ranking Reports.
• KeywordEnvy (checks up to 5 terms at a time and represents data in a handy graph.

Tools that Compare Different Search Engine Results

More search related tools:

• Pagerank Search allows to sort Google search results by Google PageRank or by relevance.

6. Website Traffic and Demographics Report