User Agents

W3C_Validator/1.305.2.12 libwww-perl/5.64

This user agent string belongs to W3C_Validator, which is a library used to perform HTTP requests (more often, in the automatic mode as a web crawler or bot).

Browser
Name W3C_Validator
Developer W3C
Type Bot/Crawler
Capabilities
ActiveX Controls No
Background Sounds No
Cookies No
Frames No
Iframes No
Java Applets No
JavaScript No
Tables No
VBScript No
Properties
RSS Reader No
Fake No
Crawler Yes
Anonymized No
Mobile No
Tablet No
Modified No
Beta Version No
Alpha Version No
CSS Support
CSS 1 No
CSS 2 No
CSS 3 No
CSS 4 No