Litmus

Test with Litmus wherever you build emails.

Whether you’re using a local editor or your email service provider’s email editor to create emails, Litmus Extension lets you preview, troubleshoot, and optimize your email right where you build, saving you time and helping you boost email accuracy. You can download the Litmus Extension for free, but it requires a paid Litmus account for full access to pre-send email testing.. Learn more and sign up: litmus.com/extension