1. Using the HTML and CSS Validation Services

2. Go to http://validator.w3.org/

3. Three ways to validate There are three ways to validate:
Providing the URI (uniform resource identifier) basically the web address if the file has been posted to a site
Uploading the file to the Validation Service
Pasting the page code into a text box on the validation Server
We will show here the second method above

4. Choose the File Upload tab and then click on the Browse button

5. Use the dialog box to locate and “Open” your file

6. Once the file path has been specified, click the Check button

7. Result of XHTML validation

8. Now go to the CSS Validation Service at http://jigsaw. w3

9. Again, we chose to upload by browsing for the file

10. Click on More option and then choose All from the Warnings drop-down list

11. Click the Check button

12. Result of CSS Validation