The code editor built for email development

Live Preview

Preview your email in real-time without refreshing the page.

Send Tests

Send unlimited test emails to your inbox.


Support the widest range of email clients and stay under the 102KB Gmail limit.

Accessibility Testing

Simulate common visual impairments to ensure your emails are accessible for all of your subscribers.

Bring Your Own Organization

Keep your emails and projects organized with folders.

First-class MSO support

Spend less time grappling with Outlook specific code with built in syntax highlighting for MSO comments.