SEO Tools, webmaster must

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Content and Structure tools

Search Engine Crawl Content simulator

Can simulate spiders crawl the specified page text,link,keywords and description information
http://www.webconfs.com/search-engine-spider-simulator.php

Similar page detection Tool

Check the similarity of two pages. If the similarity is more than 80%, you may be punished.
http://www.webconfs.com/similar-page-checker.php

Google Sitemaps Online creation

Create Google Sitemaps sitemap files Online

Chinese: http://www.xinqj.com/sitemap/sitemap.asp

English: http://www.xml-sitemaps.com/

Google Sitemaps Builder. Net

Google Sitemaps creates software that makes it easy to create Web sites Sitemaps
http://www.seobbs.net/read.php?tid=10620

Comprehensive query Tools

Site collection Query

At the same time query Google, Baidu, Yahoo and other 8 search engines included in the situation
Http://tool.cndw.com/Shoulu/Index.asp

Keyword ranking query
You can also query 3 search engines for the ranking of keywords specified in the specified Web page.
Http://www.seores.com/search/keywordrank.asp

Search Engine Optimization Monitors (SEO monitor)

A small software only 321K, you can query multiple search engines at the same time, a number of keyword rankings. and automatically record the history rankings.
http://www.seobbs.net/read.php?tid=2490

Google Server keyword ranking query

Query in Google each server, specify the page to specify the keyword ranking, can be used as a take-off and landing reference
Http://tool.cndw.com/Rank/Index.asp

Keyword Tools

Google AdWords Keyword Tool

Query for the extended match, search volume, trend, and popularity of the specified keyword.
Https://adwords.google.com/select/KeywordToolExternal

Baidu related Search

Sort by popular program, listing the extended matches and popularity of the specified keywords
http://d.baidu.com/rs.php

Keyword Density analysis tool

Analyzes the number of occurrences of a specified keyword on a specified page, and the corresponding percentage density

Chinese: http://tool.cndw.com/Seo/Key_Density.asp

English: http://www.keyworddensity.com/

Keywords Popular ranking and index

Baidu Rankings: http://top.baidu.com

Baidu Index: http://index.baidu.com/

Yahoo List: http://misc.yahoo.com.cn/top_index.html

Sogou Index: http://www.sogou.com/top/?IPLOC=CN1102

Search Billboard: Http://www.soso.com/lhb/s_i_sosolhb.shtml

Google Tools

Google Sitemaps

Google launches a free service, an outstanding SEO tool
Http://www.google.com/webmasters/sitemaps/docs/zh_CN/about.html

Google Analytics

Google's free analytics service. Provide a lot of professional reports on marketing and content optimization. It's a great help to search engine marketing.
http://www.google.com/analytics/zh-CN/

Google Dance Query Tool

Not only can query dance situation, but also through e-mail timely access to the monthly Google dance notice
http://www.seochat.com/googledance/

View PR values on Google servers

Using this tool, you can determine whether the PR update, predict the updated PR value
Http://www.seochat.com/seo-tools/future-pagerank

Google PR History Update schedule

Look at Google 2000 to see the date of the update PR and the length of the period
Http://www.seocompany.ca/pagerank/page-rank-update-list.html

Link tool

Link wide-scale detection tool

Reverse link query tool. At the same time support Google, Baidu, Yahoo and other 8 search engines
Http://tool.cndw.com/LinkIn/Index.asp

Search for links in Google tools. You can grab text titles and links. The Chinese title shows a garbled
http://www.webconfs.com/google-backlink-checker.php

Yahoo New link checker, you can query the site all the retrieved pages and reverse link
http://siteexplorer.search.yahoo.com/

Query the number of links in Google,yahoo,msn
http://www.trafficzap.com/linkpopularity.php

Invalid link checking tool

Check the links within the specified page. Include link validity check, link type, link types
Http://www.seores.com/search/checkurl.asp

Glink Checker of the Consortium
Http://validator.w3.org/checklink

Other tools

The relational table of major foreign search engines and human directories

A flash, analysis of the foreign mainstream search engine and the relationship between the artificial directory, overseas promotion is very helpful
http://www.seobbs.net/read.php?tid=911

Site History Query Tool

The United States Internet Archive (the Internet Archive) has been saved from 1996, with the help of the Alexa search engine to obtain information on the site
Http://web.archive.org/collections/web/advanced.html

Catalog Collection Query

Check if a Web site is logged into multiple important categories
http://www.123promotion.co.uk/directory/index.php

Alexa World Rankings Query
Http://alexa.chinaz.com/Index.asp