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# Web Validation

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## 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

Input the address of the page you want to validate in the box below:

## Validate your CSS files with W3C

Input the address of the css file that you want to validate in the box below:

## 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.

Input the address of the page you want to validate in the box below:

## Validate your XML files with Internet Explorer

Input the address of the page you want to validate in the box below:

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