21 Best FREE SEO Tools for On-Page Optimization

Keyword Research

Developing the right list of keywords remains a staple of SEO, even in 2013. Because the keyword selection has such a profound impact on the overall performance of a website, the keyword selection process shouldn’t rely on a single tool.

1. Wordstream

Wordstream

The Wordstream Free Keyword Tool offers thousands of keyword ideas from a huge database of more than a trillion unique searches. This tool outperforms some of the paid alternatives in the market.

2. Keyword Eye Basic

Keyword Eye

Keyword Eye Basic is a visual keyword suggestion tool, that works particularly well for brainstorming sessions.

3. YouTube Keyword Tool

YouTube Keyword Tool

Julie Joyce recently described in detail just how great the YouTube Keyword Tool is for keyword research for all kinds of content, not just video.

4. Ãœbersuggest

Ubersuggest

Ãœbersuggest utilizes the “Suggest” data from Google and others. A terrific tool for developing long-tail phrases.

Content Tools

Everyone knows by now that Panda ushered in a new era for content quality. No longer will cheap, spun, or duplicate content frequently find its way to the top of the SERPs. These tools will help you with your content development

5. Anchor Text Over Optimization Tool

Anchor Text Over-Optimization Tool

The Anchor Text Over Optimization Tool outputs anchor text diversity. Words or phrases that are potentially over-optimized are highlighted for manual review.

6. Convert Word Documents to Clean HTML

Convert Word Documents to Clean HTML

Convert Word Documents to Clean HTML is a free converter tool for documents created in Microsoft Word, Writer, and other word processing software.

7. Copyscape

Copyscape

Copyscape is a free plagiarism checker. The software lets you enter a URL to detect duplicate content and to verify that your content is original.

Technical Tools

Don’t let the title scare you away. These are technical tools designed to be used by the non-technical among us.

8. Xenu’s Link Sleuth

Xenu Link Sleuth

Xenu’s Link Sleuth is a PC based spidering software that checks websites for broken links. It performs validation of text links, frames, images, local image maps, and backgrounds.

9. Robots.txt Generator

Robots txt Generator

Robots.txt Generator is a freeware utility that makes the creation of robots.txt files a breeze.

10. Robots.txt Checker

Robots.txt Checker

Robots.txt Checker is a “validator” that will analyze the syntax of a robots.txt file to verify the format is valid.

11. URI Valet

URI Valet

Use the URI Valet Header Checker to view total number of objects (http requests), time to download, object details, document internal links, and external links along with verifying server headers for each.

12. Title and Description Optimization Tool

Title and description optimization tool

This title and description optimization tool gives insight as to what the top ranking competitors are using for titles and descriptions. The best competitor intelligence tool of its type.

13. Image SEO Tool

Image SEO Tool

With Image SEO Tool, simply input a URL and this tool checks image name, alt attribute, and dimensions. Alerts are given if a potential problem is discovered.

14. Schema Creator

Schema Creator

The Schema Creator tool is the easiest way to get started creating HTML with schema.org microdata.

15. Google Snippet Preview

Google Snippet Preview

The snippet that appears in Google Search is usually taken from these meta tags. The Google Snippet Preview tool helps visualize and optimize what is displayed to searchers.

Google Snippets Preview Tool

16. Structured Data Testing Tool

Structured Data Testing Tool

The Structured Data Testing Tool verifies Schema.org or any other structured data type markup.

17. XML Sitemap Generators

XML Sitemap Generators create “web-type” XML sitemap and URL-list files (some may also support other formats).

18. XML Sitemap Inspector

XML Sitemap Inspector

XML Sitemap Inspector validates your sitemap (XML or gunzip), repairs errors, and pings all search engines.

19. Pingdom Website Speed Tool

Pingdom Website Speed Test

Pingdom’s Website Speed Tool tests the load time of a page, analyzes it, and finds bottlenecks.

20. Fiddler

Fiddler

Fiddler is a web debugging tool which logs all HTTP(S) traffic between your computer and the Internet.

21. Microsoft Free SEO Toolkit

Free SEO Toolkit

Now that you have run each of these tools over your website, it’s time to run a full blown SEO audit, complete with detailed reports. Fortunately, Microsoft has created a Free SEO Toolkit which does just that.

What are some of your favorite tools for on page optimization?

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