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iCalendar Validator based on Ben Fortuna's iCal4j. if your calendar passes this validator, it will probably work in Google Calendar and Sunbird,

Embed tools Valid XHTML YouTube embed code generator Valid XHTML MySpace embed code generator Valid XHTML Vimeo embed code generator Numbers Number to words spelling tool Fibonacci calculator Roman to decimal converter Number base convertor Strings String similarity test tool Online count lines tool Encryption Online hash calculator Online encrypt tool Online decrypt tool Online XTEA encrypt tool Online XTEA decrypt tool Online XXTEA encrypt tool Online XXTEA decrypt tool Online ASCII85 Encoder Online ASCII85 Decoder

Page Valet 4 offers the most comprehensive and accurate markup validation service anywhere on the net. It merges our previous native XML Validator into the Page Valet service.

The grid system generator will create fixed grid systems in valid css / xhtml for rapid prototyping, development and production environments *. In addition to the css framework, it creates a background file (sample) that you can use in Fireworks, Illustrator, OmniGraffle, Photoshop, Visio (etc.) to aid in prototyping and design.

The SGML tools are: nsgmls - SGML analysis and validator spam - markup stream editor sgmlnorm - a simple normalizer sx - SGML to XML convertor spent - entity manager

link testing, HTML validation, load time testing and spell checking  Link Check Browser Compatibility HTML Check & Repair Load Time Check Spell Check

wysihtml5 is an open source rich text editor based on HTML5 technology and the progressive-enhancement approach. It uses a sophisticated security concept and aims to generate fully valid HTML5 markup by preventing unmaintainable tag soups and inline styles.

Read who makes the rules

Have you ever seen a Internet Explorer inside a Firefox Browser? Maybe you have recently moved to Linux/Mac operating system from Windows but you are missing familiar interface and want to spend some time on Microsoft Windows but don't have access to it, if this is scenario for you then here is windows4all.com. Windows4all.com is a Silverlight based online virtual operating system. It is is a website that simulates an operating system inside your web browser. Windows4all.com replicates the desktop environment of a modern operating system. You can launch applications right away without installation. Windows4all is web-based and requires Silverlight 2 to operate. Besides desktop, taskbar, start menu and sidebar currently it includes such applications: * File Explorer * Internet Explorer * Video Player * Rich test editor * RSS reader * Notepad * Paint * Calculator * Games like Chess, Solitaire, Spider, Tic-tac-toe Also it supports installing program functionality. But this program should be developed in Silverlight and have valid url for xap file. This content requires Microsoft Silverlight. Get Microsoft Silverlight

1. Site Loading Speed Test2. Visitor Breakdown Test3. Backlink Checker4. Meta Tags Analyzer5. Most Common Keywords Test6. h and h2 Tag Test7. URL Canonicalization Test8. Learn more about canonicalization issues9. Nested Tables Test10. Image Expires Tag Test11. Favicon Test and Validator12. Page Objects Count Test13. Page Objects Listing Test14. Directory Browsing Test15. Server Signature Test16. Libwww-perl Access Test

Site Valet 2.0 is the new release of Site Valet Enterprise Edition, our comprehensive QA system for Web-based technologies. Features a new GUI Client, improved Accessibility analysis with full audit trail, and comprehensive XML support. An Online Demonstration is available.

HTML validator with many options

BlogSieve is a free web-based tool that creates new feeds by filtering, merging and sorting existing feeds. The BlogSieve engine accepts virtually every (valid) feed format, processed results are then exported into any feed format you choose.

ZeroDayScan is a revolutionary online web security scanner. It is used by webmasters and security experts to validate security of their websites. Application unique features are: No installation is required. It is an online service Detects Cross Site Scripting attacks (XSS) Detects Hidden Directories and Backup Files Looks for Known Security Vulnerabilities Searches for SQL Injection Vulnerabilities Automatically detects zero day bugs Performs Website Fingerprinting Generates free PDF reports

This one can display only the broken links.

View your own site as your visitors do. You may have put a lot of time and effort into creating your web site, but that effort is wasted if the majority of Internet users are unable to view it. Some site are even not usable at all by some users. Simply enter your URL to a surfer site view.

WAVE is a free web accessibility evaluation tool provided by WebAIM. It is used to aid humans in the web accessibility evaluation process. Rather than providing a complex technical report, WAVE shows the original web page with embedded icons and indicators that reveal the accessibility of that page.