Web Validation
Web Page Validator
A validator is a software program that can check your web pages against the web standards.
When using a validator to check HTML, XHTML or CSS documents, the validator returns a list of errors found, according to your chosen standard.
Make sure you make it a habit to validate all your web pages before publishing.
Validate your HTML files with W3C
Validate your CSS files with W3C
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You will often get some errors when you run W3C validations. There will always be some browser specific values outside the current W3C specification: |
|---|
| Error | Description |
|---|---|
| pointer-events | Invalid property in CSS3, but suggested for CSS4. Often used to remove hand pointer from disabled elements. |
| user-select | Invalid property in CSS3, but suggested for CSS4. Often used to remove text selection from clickable elements. |
| pseudo-class :valid | Invalid value in CSS3, but suggested for CSS4. Often used to indicates valid input. |
| @-webkit-keyframes | Often used to make animations work in webkit browsers (older versions of Chrome, Safari, and Opera). |
Validate your XHTML files with W3C
An XHTML document is validated against a Document Type Definition (DTD).
You can read more about XHTML validation in our HTML tutorial.
