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Unicorn is W3C's unified validator, which helps people improve the quality of their Web pages by performing a variety of [wiki:Documentation/FAQ#checks]. Unicorn gathers the results of the popular HTML and CSS validators, as well as other useful services.

This site addresses these audiences:

• Users, those who want to check their Web pages and understand how to fix them based on Unicorn results.
• Developers, those who wish to add new services, work on existing services, or help develop the underlying Unicorn framework.
• Server Managers, those who wish to run their own Unicorn service locally.

Make a donation to support the free Unicorn service and see below for providing feedback or reporting a bug.

Table of Contents Use Unicorn - Make the Web Better! Develop Unicorn and Validation Services Add a new service to Unicorn Contribute code to Unicorn Run a Unicorn Server

Use Unicorn - Make the Web Better!

Learn more about how to use Unicorn to improve the quality of your Web pages.

• [wiki:Documentation/FAQ#checks]
• [wiki:Documentation/Howto]
• [wiki:Documentation/FAQ] including [wiki:Documentation/FAQ#HowdoIgetstartedmakingmypagesvalid].
• The Unicorn interface is available in more than 20 languages. Help make Unicorn available in your language by adding a translation or improving an existing one.

== Suggestions and Bug Reports == #Feedback We welcome your comments, suggestions, and bug reports.

• For general discussion and feedback, use the publicly archived mailing-list ![email protected]
• For bug reports, open a new ticket in the issue database.
• For new feature ideas, send us an enhancement request.

Thanks for supporting Unicorn!

Develop Unicorn and Validation Services

W3C welcomes community participation to improve the open source Unicorn project. Note: the tabs at the top of this wiki relate Unicorn code development.

Add a new service to Unicorn

Unicorn is designed so that people may easily create and integrate new validation services.

• [wiki:Documentation/Observer]
• [wiki:Documentation/Observer/Tutorial]

Contribute code to Unicorn

• [wiki:Documentation/Install]
• [wiki:Documentation/Architecture]

If you are interested in contributing to the Unicorn code base, please write to ![email protected].

Run a Unicorn Server

You may also wish to download and install your own Unicorn server (e.g., behind a company firewall).

• [wiki:Documentation/Install]
• [wiki:Documentation/Tasklist]