Check Your Web Site
Use these tools to quickly check the pages of your site for valid markup, accessibility, usability, browser compatibility, spell checking, etc.
You may also want to review the Top Ten Web Design Mistakes and check out the Sherlock tool.
ZDNet's NetMechanic Toolbox
Finds broken links, spots bad HTML code, checks browser compatibility, finds slow-loading pages, and checks your spelling, all in one shot.
Web Page Performance & Speed Analyzer
Calculates page size, composition, and download times, including the size of individual elements and web page components. Offers advice on how to improve page load times.
Pingdom: Detailed Load Time Analysis
Calculates and displays a numeric and graphical load time analysis of all internal and external page objects, including XHTML, RSS, XML, CSS, Scripts, Images, and Plugins.
W3C HTML/XHTML Validator
Checks your pages for correct HTML and XHTML markup.
Validate by URL
Validate by File Upload
W3C CSS Validator
Checks your pages for correct Cascading Style Sheet (CSS) markup.
Validate by URL
Validate by File Upload
W3C Link Checker
Check all the links on your site.
WAVE Accessibility Evaluation
Helps check your page for accessibility for people with disabilities.
Mobile-Readiness Evaluation
Test the mobile-readiness of your site using industry best practices and standards.
Browser Screen Resolution Checker
Simulates your web page in different screen resolutions.
Vischeck Page Simulator for Vision-Impaired Users
Colorblind Web Page Filter
Color Contrast Check
Determines if two colors provide sufficient contrast to pass the W3C Accessibility Guidelines and Section 508 requirements.
GrayBit Grayscale Page Simulator
Convert your full-color web page into a grayscale rendition in order to test the page’s perceived contrast for accessibility.
Search Engine Browser Simulator
See your website like a search engine sees it.
Link Popularity
Find out how many sites are linking to your site, and who they are.
Keyword Selector
Use the Google Keyword Tool to help you select the best keywords for the META tags on your pages. Better keywords = increased traffic.
Test the Readability of a Web Site
Provides content authors with an evaluation of the readability of their website and assists with Guideline 14 of the W3C Web Content Accessibility Guidelines (documents are clear and simple).
Audit It URL Checker
Use this handy tool to check which major search engines have included your site in their index and how many pages are included in their index.
ZDNet's NetMechanic GIFBot
Optimizes GIF and JPEG images by up to 90% without loss of image quality.
Brown University's XML Validator
Validates XML documents locally or on the web.
XML & XML Schema Validator
Validates XML documents against an W3C XML Schema (XSD) or an XML Data-Reduced (XDR) schema, verifies the schemas are valid, or simply checks the well-formedness of XML documents.
JSLint: The JavaScript Verifier
JSLint scans JavaScript source code, examining it for problems. If it finds a problem, it returns a message describing the problem and an approximate location within the code.



