Markup Validation Service

Check the markup (HTML, XHTML, …) of Web documents

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• Error(s) blocking validation

Sorry! This document cannot be checked.

1. 

   I got the following unexpected response when trying to retrieve <https://validator.w3.org/sgml-lib/sgml.soc>:

   403 Forbidden

   You can choose to validate the received error document for example if the URL intentionally points to one (there is also a "Validate error pages" option in the options view for this purpose).

This service runs the W3C Markup Validator, v1.3+hg.

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