| Online Tool | Description |
|---|
| Broadband Tests and Tools | Speed tests, port scan, etc. Some tools require registration. |
| CSS Generator Style-o-matic | Shows text boxes styled using online forms and generates style sheet. |
| CSS Validation Service | Checks validity of CSS style sheets according to the W3C standards. |
| CSSCheck | Checks validity of CSS style sheets according to the CSS1 and CSS2 standards. |
| HTML and CSS Table Border Style Wizard | Generates CSS and HTML source code. |
| HTML Validation Service | Checks internet web documents, like HTML and XHTML, for conformance to W3C Recommendations and other standards. |
| HTML Validator - WDG | Checks HTML validity for a single or multiple URL's in batch mode. |
| HTTP Viewer | Shows HTTP communication protocol details including header, cookies, if set, URL forwarding, etc. |
| NetMechanic HTML Toolbox | Checks HTML validity, links, speed of page loading. |
| Network Security checks | Scan ports commonly used by trojans and viruses. |
| RGraph | A canvas graph library based on the HTML5 canvas tag. Interactive javascript canvas graphs. |
| rot13 Encoder Decoder | Caesar-cypher encryption that replaces each English letter with the one 13 places forward or back along the alphabet. |
| ShieldsUP! | Internet security profiling that checks vulnerability of file sharing and service ports. |
| SMTP Diagnostics | Email server SMTP Diagnostics. |
| Speedmeter | Internet connection download upload speed test. |
| Text Fixer | Conversions: Text to HTML, Word to HTML, Remove Line Breaks, Alphabetize Text, CSV to HTML Table. |
| Virustotal | Online free service that analyzes files for viruses, worms, trojans, and other malware. |
