W3C has written 2 programs algorithms to
check the compliancy of a HTML page.
Both algorithms are included in HTML Validator for Firefox.
Both have advantages and incovenients.
![]() HTML Tidy |
![]() SGML Parser (OpenSP) |
|
---|---|---|
Description | It is an algorithm designed only for checking the HTML syntax. | It is the same algorithm running behind the validator.w3.org |
Better for | HTML | XHTML |
Accessibility check ![]() |
WAI level 1,2,3 | - |
Cleanup page | Yes | - |
Good help | Yes | No (Todo) |
Clear error messages | Yes | No |
Same errors than the validator.w3.org | No | Yes |
Target Audience | Beginner | Professional |