How to Test

Open your web browser and go to http://validator.w3.org/ You can enter a web address or upload code to the validator.
The validator will test your code against the DTD of the Doctype Declaration that starts your code.
If either the Doctype Declaration or the Character Encoding are not specified, the validator can not validate the page.

Open your web browser and go to http://validator.w3.org/ You can enter a web address or upload code to the validator.