CSE HTML Validator - Used by Thousands

CSE HTML Validator Pro
Version 9.01 Now Available
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Professional: $129 or less
Standard: $69 or less
Lite Edition: FREE
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CSE HTML Validator for Microsoft Windows is a powerful, easy to use, user configurable, and all-in-one HTML, XHTML, and CSS checker that includes a link checker, spell checker, accessibility checker, built-in editor, and also checks for search engine issues. CSE HTML Validator helps eliminate website problems that cause visitors to leave websites. It increases productivity and saves time and money. THOUSANDS of registered customers use CSE HTML Validator, including web professionals, webmasters, corporations, government agencies, individuals, teachers, students, and non-profit organizations. Unlike many other HTML validators and checkers, CSE HTML Validator features an unusually powerful custom syntax checking engine that is specifically designed to check HTML, XHTML, and CSS.

"I have been developing web sites professionally for 10+ years, and pride myself on my coding abilities. I am impressed with the mistakes that validator catches and have found it to be especially helpful with dynamic and database driven web sites for making sure the HTML and tables returned are valid, and all tags are properly closed. Needless to say, validator has become an important tool in all of my projects."
- Bill Mezian, CSE HTML Validator User

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Latest News

(January 30, 2009) CSE HTML Validator Pro v9.02 BETA 2: Now available to registered v9.0x pro users. Download v9.02 Pro BETA | More v9.02 BETA Info | Upgrade Now.

(December 25, 2008) Merry Christmas: AI Internet Solutions wishes you a Merry Christmas and a Happy New Year!

(October 6, 2008) CSE HTML Validator Std/Pro v9.01: Now available to registered v9.0x users. Download v9.01 Pro | Download v9.01 Std | More v9.0 Info | Upgrade Now.

(October 3, 2008) CSE HTML Validator Lite v9.00: Now Available! This is a major update to the FREE (for personal and educational use) lite edition. Download v9.00 Lite

(August 19, 2008) OnlineWebCheck.com: We've upgraded our online HTML checker (new window) to increase speed and capacity. We also recently improved the output and added HTTP header information for URLs. More Info About OnlineWebCheck.com

(June 26, 2008) 3D2F.COM Review: A CSE HTML Validator review by 3D2F.COM (new window) says "If finding an ultimate HTML, XHTML and CSS checking tool with link checking is definitely on your agenda, then consider the job done!".

(June 20, 2008) EmEditor: EmEditor (new window) now has an updated plug-in that provides integrated support for CSE HTML Validator. The new version adds link checking from within EmEditor. Programs Supporting CSE HTML Validator

(October 31, 2007) New Web Development Forums: We've added new general web development talk forums to our CSE HTML Validator discussion forums. If you haven't already, please be sure to register in our forums. The VIP code needed to register is 3310. More New Forum Info | Forums | Register in Forums | Forum RSS Feed Info

(July 2, 2007) New Online Demos: We have created new online CSE HTML Validator demonstrations.

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You could be losing web site visitors. Fix your web site with CSE HTML Validator.

"I've been using HTML for years and I've learnt more in the weeks fixing my website with your validator than all the books and courses I've attended."

"The 15 or so hours I've spent with CSE has saved hundreds, if not thousands, of hours of browser QA, support email, etc."

"CSE HTML Validator has proven to be amazingly useful, even after I challenged myself to weed out my errors before giving the validator a look."

"CSE HTML Validator, that we use consistently during development, holds its own and, actually, outperforms against similar applications that cost hundreds of dollars more."

More Testimonials | Online Demo

Why Validate?

There are many reasons why you should validate your web pages. Find out what they are.

Why is CSE Better?

Find out why CSE HTML Validator for Windows is better than other HTML checkers, such as the popular W3C HTML Validator.

Great Awards, Reviews, and Recommendations!

ZDNet gives CSE HTML Validator the maximum five star rating.

CSE HTML Validator has received many awards for outstanding software. Above is a randomly chosen award. See many more awards.

Use CSE HTML Validator Standalone or Integrated!

You can use CSE HTML Validator Std/Pro by itself, or from within a program that supports it.

Tell Me More About CSE HTML Validator...

CSE HTML Validator is for Microsoft Windows 2000, XP, Vista and above, but can also be used on a Mac. Older versions (v7.0 and below) are available which will work on older systems like Windows 98 and Me.

If you use online validation services, then you should definitely try CSE HTML Validator. It is more reliable, more powerful (finds more problems), faster to use, much more user configurable, and displays easier to understand messages. It also includes tools not available with online validation services. See why CSE HTML Validator is better.

If you use a validation feature that's included with an HTML editor or other program, then you should definitely try CSE HTML Validator. CSE HTML Validator's specialty is validation, doing it thoroughly and being more helpful than validators that are just thrown-in as just another feature. CSE HTML Validator also has many benefits and features that you won't get elsewhere.

Download CSE HTML Validator for Windows

You could be losing your visitors and customers due to bad HTML, broken links, and other problems. Why not fix these problems? Download a FREE trial version that is good for 100 validations or thirty days (whichever comes first).