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.

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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.

URL:

Pages:    This page only    First 5 pages

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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.

URL:

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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.

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W3C HTML/XHTML Validator

Checks your pages for correct HTML and XHTML markup.

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W3C CSS Validator

Checks your pages for correct Cascading Style Sheet (CSS) markup.

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W3C Link Checker

Check all the links on your site.

Enter the address (URL) of a document that you would like to check:

Options

Summary only
Hide redirects: all for directories only
Don't send Accept-Language headers
Check linked documents recursively, recursion depth:

Save options in a cookie

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WAVE Accessibility Evaluation

Helps check your page for accessibility for people with disabilities.

URL:

File:

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Mobile-Readiness Evaluation

Test the mobile-readiness of your site using industry best practices and standards.

URL:

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Browser Screen Resolution Checker

Simulates your web page in different screen resolutions.

URL:
Screen Resolution:	- Please select the screen resolution - 544 x 378 (WebTV) 640 x 480 800 x 600 832 x 624 1024 x 768 1152 x 864 1280 x 1024

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Vischeck Page Simulator for Vision-Impaired Users

Select the type of color vision to simulate:

	Deuteranope (a form of red/green color deficit)
	Protanope (another form of red/green color deficit)
	Tritanope (a blue/yellow deficit- very rare)

URL: 

Select the type of color vision to simulate:

	Deuteranope (a form of red/green color deficit)
	Protanope (another form of red/green color deficit)
	Tritanope (a blue/yellow deficit- very rare)

Image file: 

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Colorblind Web Page Filter

URL:                      

Select Color Filter: protanopia (red/green color blindness; no red cones) deutanopia (red/green color blindness; no green cones) tritanopia (blue/yellow color blindness; no blue cones) grayscale/achromatopsia (quick check for all forms of colorblindness) atypical achromatopsia (low cone function; cone monochromat) protanomaly (anomalous red cones) deutanomaly (anomalous green cones) tritanomaly (anomalous blue cones) coverage test in black (highlight filter limitations) coverage test in white (highlight filter limitations) coverage test in gray (highlight filter limitations)

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Color Contrast Check

Determines if two colors provide sufficient contrast to pass the W3C Accessibility Guidelines and Section 508 requirements.

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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.

URL:

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Search Engine Browser Simulator

See your website like a search engine sees it.

URL:

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Link Popularity

Find out how many sites are linking to your site, and who they are.

URL:

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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.

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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).

URL:

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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.

URL:

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ZDNet's NetMechanic GIFBot

Optimizes GIF and JPEG images by up to 90% without loss of image quality.

URL:
What output image types would you like to see?
Same as input type GIF Only	JPEG Only Both GIF and JPEG

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Brown University's XML Validator

Validates XML documents locally or on the web.

File:

Suppress warning messages  Relax namespace checks

URL:

Suppress warning messages  Relax namespace checks

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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.

Schema document:
NamespaceURI:
XML document:

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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.