There are a variety of different tools represented here. Some will analyze one specific aspect of a page and others will give an overall grade to the page as a whole. Most of them will help you with your SEO efforts. Try a few of them that looking interesting and helpful.

Website Grader from HubSpot

Website Grader is one of my favorite tools on the list because of how helpful and usable it is. You’ll get a lengthy report broken into various sections with an evaluation of the page and recommended changes. While the grade is helpful to know where you stand, the suggestions are more valuable because they help you to identify areas for improvement, and many of them can be pretty simple.

Trifecta from SEOmoz

One of the more unique tools in this list, Trifecta will analyze a page, a blog, or an entire domain based on slightly different criteria. Trifecta will produce numbers based on a variety of factors and it will give you an overall score. Without a pro membership you’re limited to one report per day.

Spider Simulator from Summit Media

This tool will give you a good idea of how search friendly you site is, and it will also give you a percentage rating. It bases the rating on factors like meta tags, use of headers, images and alt tags, load time, and links.

Web Page Analyzer from WebsiteOptimization.com

This free tool will give you plenty of information to work with. It will test how long the page takes to load, how many objects are on the page, the size of the objects and more. The most helpful part of the report that is produced is the “Analysis and Recommendations” section where it will list 11 aspects of the page and give you a rating. Red items are warnings, yellow items are cautions, and green items are good.

SEO Analysis Tool

Get a lengthy and detailed report from this tool. It will analyze things like your meta tags, keywords, and anchor text on the page. It’s a good resource for getting a nice overall look at the SEO of your page.

The Escape’s Web Page Analyzer

This tool will help you to identify problems with heading structure, links, use of keywords and content. It’s not as detailed of a report as some of the others, but the information that’s provided is helpful and it features a better presentation than most other tools.

Seed Keywords

Seed keywords offers a “plain English SEO review” that analyzes certain aspects of a page and makes recommendations. It provides a basic explanation of why elements that are analyzed will impact the SEO of the page.

Web Page Analyzer from FreeWebSubmission.com

This tool gives you a general overview of the page and a number of specifics that have been analyzed. Like many of the other tools, it will analyze your meta tags and make suggestions if it finds that any improvements are needed. It also looks at the size of the page and the load time, keywords in the anchor text of the page, keywords in alt tags, and the keyword density.

Spider Test from We Build Pages

The Spider Test tool will give you a quick, simple look at how your page appears to search engines. It will show the page title, description, keywords, size of the page, the text of the page, and more.

Web Page Analyzer from Webmaster Toolkit

This Web Page Analyzer will allow you to specify a URL and a targeted phrase for search engines, and it will give you some feedback on how well the page is optimized for this phrase.

Link Appeal from Webmaster Toolkit

Do you want to see if a certain page (on your site or on someone else’s) is valuable place from which to get a link? Enter the URL and it will give a score based on a few factors like PageRank and number of outbound links.