Tart is a free, standalone, css and markup tester with a built in editor.

Validating local files can be difficult or impossible with web based tools. Tart can validate local files, even when you're offline, since it is a standalone application.

You can use the CSS Validator, Markup Validator and Feed Validator to validate your CSS, HTML and feeds, or you can test them all with Tart.

Finding problems isn't your goal, producing compatible web documents is. Tart allows you to categorize messages so that you can focus on real problems. And you can quickly repair problems using Tart's built in editor.

Requirements:

· Java 1.5 or later