Litmus Builder

Easily create, edit, and navigate your code, streamlining your email development workflow.

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Build the perfect email

Build better emails faster with Litmus Builder, the web-based editor built specifically for email.

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Preview your email as you code

Get previews of your email in popular email clients while you're building. Every change you make updates your previews in real time, so you can build, test, and troubleshoot your email campaigns faster than ever before.

Builder autocompletion

Increase productivity and reduce manual errors

Import HTML code directly from Dropbox, Google Drive, or OneDrive in a single click. Plus, utilize autocompletion support for CSS and images and connections with email service providers to speed production and reduce errors.

Design library templates

Maintain brand integrity and scale development

Empower your team—even novice developers or marketers who are not coders—to create on-brand, high-performing emails without needing to code with reusable templates and code modules. Store and collaborate on these shared resources in one centralized location—regardless of how many ESPs you use.

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Collaborate on email campaigns

Make it easy for all stakeholders to collaborate on your campaigns with intuitive features like grid view to quickly navigate through code and make updates. Share your emails with the click of a button, plus utilize timeline and push functionality to keep track of every change and ensure your team is always on the same page.

Seamless view

Build, edit, review, and analyze in one seamless view

Once you're happy with your email in Builder, push your code to our other tools to loop in the rest of your team for feedback, approvals, and post-send reporting. It’s never been easier to collaborate on and build high-performing emails.

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 your 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.

One seamless view

Store shared resources in one spot

Create, store, and collaborate on templates and code modules in one spot, making them easily accessible team-wide.

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Speed production with reusable templates and code modules

Scale email development and stay on-brand with reusable code snippets, partials, and templates.

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Easily navigate your code

Click on any HTML element in the preview pane and land on that element directly within the code editor.

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Share your emails with a single click

Create a public version of your email to share with others—or send a test email directly from Builder.

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View your email’s history

Get a complete system of record. See who made changes and when, and easily restore any version at any time.

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Verify your subject line displays as intended

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

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Get notified about issues with your code

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

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Add tracking to your emails

Easily add tracking codes to your emails—including your links—to get advanced insights on your campaigns.

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Automatically inline your CSS

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

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Upload code directly from a cloud storage provider

Avoid copy and paste errors by directly importing your code into Builder from Dropbox, Google Drive, or OneDrive.

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Discover how large your email file size is

Get insights on both the compiled and original HTML file display size. Discover if you’re under Gmail’s 102KB display limit.

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View your processed HTML markup

See what each email client actually processed your email markup into, making it easier than ever to pinpoint and diagnose rendering issues.

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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
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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.

Gain valuable email performance insights

Get an aggregated view of email performance to help identify trends across successful campaigns so you can optimize future emails and inform your marketing mix.

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