NetMechanic's HTML Toolbox is a free online tool that can find errors in your HTML code. HTML Toolbox will validate your Web pages against the HTML standards and point out browser compatability issues that affect how visitors see your site. It will also find coding errors and offer design tips on how to improve your site. Here's how:

Step 1: Enter the URL of your Web site.

Step 2: Tell us whether you want to test one page or the first 5 Pages of your site.

Step 3: Enter your email address, and we'll send you your results. Leave this field blank for immediate processing.

Step 4: Press "Go" to start your job.

HTML Toolbox will return a page summary. In the middle of the page is a table that shows a summary for 5 reports.

Step 5: Click on "View a Detailed Report" for specific details of each test.