Checkmark is a web-based tool for previewing markup text as HTML. It was created by me (Andre Burdette) using Ruby, Sinatra, HAML, and the awesome Twitter Bootstrap. I created Checkmark because I was tired of commiting changes to markdown files only to find out that they weren't being displayed properly.
You can use checkmark at: http://checkmark.heroku.com
Getting the source
You can get Checkmark from source via github:
git clone git://github.com/aburdette/checkmark.git
Running Checkmark locally
After you have obtained the source, you need to install the required gems. This is made simple with the use of a gem called
When complete, simply run the server and open a browser to: localhost:9292