Everything you need to build & deliver bulletproof emails.
Master the visual editor, configure Handlebars dynamic templating, export responsive MJML and HTML, and integrate transactional email rendering into your applications.
Choose Your Pathway
For Marketing Teams
Design engaging campaigns, use starter templates, insert merge tags, and export HTML into Mailchimp, Klaviyo, or SendGrid.
For Developers
Automate transactional receipts, inspect the JSON AST schema, render templates over REST API, and manage API keys.
For Designers
Build responsive layouts, enforce typography and brand colors, master 2x Retina images, and design for Dark Mode.
Interactive Merge Tag Converter
PostBrix templates use Handlebars syntax. Compare how personalization tags translate across 10 supported email platforms.
ESP Merge Tag Translation Engine
Select your delivery platform to see the required syntax for personalized fields.
Explore by Category
Getting Started
Learn PostBrix basics, canvas setup, and export your first responsive email.
Dynamic Content
Handlebars variables, conditions (if/else), loops (each), and sample data preview.
Email Platforms
Guides for Mailchimp, SendGrid, Klaviyo, Brevo, HubSpot, Postmark, and more.
Clean MJML under the hood. No brittle nested tables.
Every email built in PostBrix compiles through strict MJML validation and is tested across Gmail, Apple Mail, and Outlook desktop. Export clean HTML or render via API in milliseconds.