liquid-md5

A Liquid filter that outputs an MD5 hash

1. Add gem 'liquid-md5' to your site's Gemfile and run bundle
2. Add the following to your site's _config.yml:

gems:
  - liquid-md5

{{ site.email | md5 }}

Can be useful for generating Gravatar URLs from email addresses.

http://gravatar.com/avatar/{{ site.email | downcase | md5 }}?s=144