Litmus Builder

The code editor built to streamline your email development workflow

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Build the perfect email

Build your email in our web-based email editor and get previews in all popular email clients as you go. Every change you make updates your previews in real time, so you can build, test, and troubleshoot your email campaigns faster than ever before.

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Apple Mail 8
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Apple Mail 9
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Outlook 2000
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Outlook 2003
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Outlook 2013

Preview your email as you code

Get previews of your email in popular email clients while you're building. See your design in both mobile and desktop dimensions, ensuring compatibility across environments.


See code changes in real time

Every change updates your previews in real time. No more switching between your code editor and your email service provider—or manually checking every single test device—every time you make a change to your email.

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Coupon Sale
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Event Invitation

Get access to free email templates

Choose from our collection of free email templates—all pre-tested to work everywhere and fully customizable to fit your email needs. You can also build your next email campaign from scratch or create your own email template.

Grid view

Easily navigate your code

Grid view makes it faster and easier to navigate your code. Just click on any HTML element in the preview pane and land on that element directly within the code editor.

Integrate Builder with your email service provider

Getting your email from your code editor into your email service provider (ESP) has always been a hassle. It’s time to say goodbye to that manual copy and paste process.

With ESP Syncing, you can automatically sync your code from Builder to your ESP with a click of a button. Once connected, whenever you make any changes to you code in Builder, it automatically updates in your ESP, too.

ESP Syncing is available for:

  • MailChimp
  • Campaign Monitor
  • Salesforce Marketing Cloud (formerly ExactTarget)
  • Eloqua
  • IBM Watson Campaign Automation (formerly Silverpop)
  • Marketo

Cut your development time in half

Built by email professionals for email professionals, Litmus Builder helps you streamline your email design and development workflow.

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CSS inlining

Inline your email’s CSS with a simple toggle and style your emails faster and easier than ever before.

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Snippets and partials

Avoid repeating yourself by creating reusable blocks of code that you can utilize across multiple campaigns.

Code analysis

Code Analysis

Identify HTML and CSS issues and troubleshoot your emails in specific email clients

Subject line checker

Subject Line Checker

Preview your from name, subject line, and preview text in real time in over 15 popular email clients

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View your entire email’s history. See who made changes and when, and easily restore any version at any time.

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Create a public version of your email to share with others or embed on any site with a single click.

Coupon Sale
Event Invitation

Builder for Designers

Cut your email development time in half.

Preview your emails as you code—and build, test, and troubleshoot your emails in record time.

Utilize quality email templates

Browse our gallery of pre-tested templates that look great and work everywhere.

Automate time-consuming tasks

Easily automate mundane email design tasks like CSS inlining or sending test emails.

Litmus for Designers
Builder split view

Builder for Marketers

Send emails that look great everywhere

Preview your email in popular apps and devices before you send, reduce errors, and maintain brand consistency

Utilize quality email templates

Browse our gallery of pre-tested templates that look great and work everywhere.

Make your email work on mobile

Improve your performance everywhere by viewing your email in both mobile and desktop dimensions before sending.

Litmus for Marketers

Builder for Agencies

Keep email marketing projects on track

Save project time and cost by having each of your design and development teams testing and iterating on real email clients, right in Litmus Builder.

Utilize quality email templates

Create consistent templates and branding across your team with a template library and code snippets that can be shared across your development teams.

Share projects internally

Use Builder’s built-in sharing features to share projects with your internal teams and your clients for review and feedback.

Litmus for Agencies