This is the W3C Markup Validation Service, a free service that checks Web documents in formats like HTML and XHTML for conformance to W3C Recommendations and other standards.
if you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets or to find broken links, there are other validators and tools available.
Validate Your Markup
Recent Updates
- 2006-11-14: Markup Validator v0.7.4 Released
- Maintenance release of the Markup Validator, including bug fixes to the API, documentation updates and the return of the outline feature.
- 2006-10-23: Markup Validator v0.7.3 Released
- Maintenance release of the Markup Validator, including fixes, updates, and adding an experimental API to interface the validator with other programs and services.
These are the most recent major changes to this service. See "What's New" for more details. News for this service are also available as an ATOM feed.