How Previews are counted in Litmus

What is an Email Preview?

An Email Preview is one individual screenshot from an email client or device. 

A set of Email Previews includes previews from all of the email clients and devices you’ve selected. For example, if you have 20 email clients selected and run a new set, you generate 20 previews. 

How are Email Previews generated?

Check out this video for a quick primer on how Email Previews work in Litmus.

Email Previews are generated in the following ways:

  • When testing an email:
    • When you send in a draft of your email from your email service provider (ESP) or start an email from the ESP syncing option, a set of Email Previews will be created. These are available in Builder and Previews & QA. 
    • When you paste in your HTML in Previews & QA, one set of Email Previews is generated. Note: Pasting HTML into theBuild or Collaborate sections does not generate Email Previews. 
    • When you upload your HTML via a file storage integration, one set of Email Previews will be created, available in the Previews & QA tab.
    • When you run Previews and QA your email within your ESP using the Litmus Chrome Extension.
  • When sharing Email Previews:
    • Sharing in Previews & QA or Builder will generate one set of Email Previews. No matter how many times the public share link is viewed, the Email Previews will only be counted once.
  • When creating an email: 
    • Clicking on Run Email Previews in Builder will generate one set of Email Previews. Note: If you already sent a draft into your Litmus test address, and the HTML has not been changed, clicking Run Email Previews will not count against your Previews usage. 
    • Once the HTML is changed or updated in Builder, clicking Run Email Previews, Update Proof & Previews tabs, or Update Previews & QA (for customers without Proof) will generate a new set of Email Previews—counting toward your Previews usage.
    • Saving a Builder project when the Email Previews window is open will generate one set of Email Previews. Note: Even if you are viewing one specific email client preview, clicking “Save” will run a full set of Email Previews.

Manage your Preview usage

Your testing volume accumulates over the course of your monthly billing period—and resets at the start of each new monthly billing period. For example, if you’re billed on the 15th of each month (or for annual plans, if you started your plan on the 15th), your Email Previews will be counted from the 15th of the month to the 14th of the following month.

The best way to manage your Previews usage is to be aware of your usage. In your Account Settings, you’ll find a usage chart that shows a summary of your account’s Email Previews usage over the last 6 months.

In the Settings area, under Email Clients, you can customize which email clients you want to test by default. This gives you more control over how many Previews are run in a set.

Enterprise accounts only: If you’re an Admin or Account Holder, you can set default email clients for your whole team to streamline testing.

If you would like to set a cap on your account to avoid overages, please contact our support team at If your account is over usage for more than 2 months, our team will reach out to see if another plan would be a better fit for your team.

How many Previews do I get each month?

Email Preview limits vary by Litmus plan subscription:

  • Basic offers up to 1,000 Previews per month
  • Plus offers up to 2,000 Previews per month
  • Enterprise offers a customizable amount of Email Previews every month, based on the unique needs of your business

Here are some helpful tips for managing Previews: 

  • If you’re going to build out an email or a template, choose the Build option and click "Start Building" or "Start from Template". This will not generate any Email Previews.
  • Remember that using the Update Proof & Previews tab (or Update Previews & QA for customers without Proof) feature will run one set of Email Previews in Previews & QA. 
  • Saving in Builder runs one set of Email Previews. You may want to close the previews window and code with just the browser view open and then click "Run Previews" when ready. 
  • Remember that importing from a File Storage service always runs one set of Email Previews as part of the Previews & QA Litmus Test. 
  • You can create a Proof without Previews by pasting HTML in the Collaborate section of the New Email dialog. This will not generate a set of Email Previews. Usage Summary. 

Remember that emailing into Litmus also creates Previews & QA so you may want to paste HTML to start and then Email in at the end of the process for final review.

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