Standalone web validators are available at PADC for several IVOA DAL and Apps standards. These validators can be used to get a validation report for any service, even unregistred. If you know the service's access URL (endpoint) you can validate it from the above menu. This site' Services page (available from the main site menu) also provide validation links for listed services included in the Registry.
Developed and maintained by PADC since 2010, the legacy validators support several versions of the "simple" DAL protocols.
A web wrapper for taplint, from the STILTS package (see this paper by Mark Taylor). In 2014, we developed a first simple version of the web wrapper. This greatly improved new release is included since version 1.7 of the PADC IVOA Services Validation Portal. Output is avalaible in HTML and JSON formats.
A specialized version of the TAP validator for checking EPN-TAP services. The EPN-TAP framework uses TAP with the EPNCore metadata dictionary. The EPNCore metadata dictionary defines the core components that are necessary to perform data discovery in the Solar System related science field.
A web wrapper, for Hipslint (by Pierre Fernique). Output is avalaible in HTML and JSON formats.