Unicorn is W3C's unified validator, which helps people improve the quality of their Web pages by performing a variety of 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.
Use Unicorn - Make the Web Better!
Learn more about how to use Unicorn to improve the quality of your Web pages.
- Validation services aggregated by Unicorn
- How to use Unicorn
- Frequently Asked Question (FAQ) including how to get started making your pages valid?.
- 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
We welcome your comments, suggestions, and bug reports.
- For general discussion and feedback, use the publicly archived mailing-list email@example.com
- 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.
Contribute code to Unicorn
If you are interested in contributing to the Unicorn code base, please write to firstname.lastname@example.org.
Run a Unicorn Server
You may also wish to download and install your own Unicorn server (e.g., behind a company firewall).