Mailcode
Everything you need

Features built for production-ready emails

From AI content generation to cross-client compatible HTML export — Mailcode handles every step of the email creation workflow so you can focus on your campaign.

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AI-Powered Content Enhancement

Powered by OpenAI GPT-4o, Mailcode analyzes your brief and generates compelling email copy — subject lines, body text, and CTAs — optimized for engagement and deliverability.

  • Tone and style optimization for your brand voice
  • Automatic subject line generation and A/B variants
  • CTA copy tuned for click-through rate
  • Professional formatting with email-safe HTML structure

Cross-Client Compatible HTML Output

Mailcode generates table-based HTML with inline CSS — the only approach that renders consistently across Gmail, Outlook 2016/2019/365, Apple Mail, Yahoo Mail, and all major mobile email apps.

  • Table-based layout — no CSS Grid or Flexbox that Outlook breaks
  • Inline CSS applied automatically for every email client
  • VML fallbacks included for Outlook background images and buttons
  • Output under 102KB (Gmail clipping limit)

Smart Brand Management

Upload your logo, set your brand colors and typography once. Mailcode automatically applies your brand identity to every campaign and optimizes assets for email client compatibility.

  • SVG-to-PNG automatic conversion (required by most email clients)
  • Logo resizing and optimization for email headers
  • Brand color palette applied throughout the template
  • Consistent brand identity across all campaigns

Mobile-Responsive Design

Every template generated by Mailcode is fully responsive with media queries that adapt the layout for smartphones and tablets — with dark mode support built in.

  • Responsive breakpoints at 600px for all email clients
  • Single-column mobile layouts automatically applied
  • Dark mode styles included via @media (prefers-color-scheme)
  • Touch-friendly CTA buttons sized for mobile tapping

UTM Tracking Integration

Every link in your generated email is automatically tagged with UTM parameters so you can track campaign performance in Google Analytics without any manual setup.

  • Auto-generated utm_source, utm_medium, utm_campaign parameters
  • Custom UTM values per campaign
  • Consistent tracking across all links in the email
  • Compatible with Google Analytics 4 and any analytics platform

One-Click ESP Export

Export clean, production-ready HTML that can be pasted directly into any email service provider — no post-processing, no stripping of styles, no reformatting needed.

  • Compatible with Mailchimp, HubSpot, Klaviyo, ActiveCampaign, Salesforce
  • Clean HTML with no framework dependencies
  • ESP-safe code that survives copy-paste into any editor
  • One-click copy to clipboard or file download

Compatible with every email client and ESP

Mailcode templates are tested and verified across all major platforms.

Email clients

  • Gmail (web & mobile)
  • Outlook 2016 / 2019 / 365
  • Apple Mail (iOS & macOS)
  • Yahoo Mail
  • Samsung Email
  • Thunderbird
  • AOL Mail
  • ProtonMail

Email service providers

  • Mailchimp
  • HubSpot
  • Klaviyo
  • ActiveCampaign
  • Salesforce Marketing Cloud
  • Brevo (Sendinblue)
  • Campaign Monitor
  • Zoho Campaigns

< 2 min

Average generation time

8+

Email clients tested on every output

8+

ESPs supported for direct export

Ready to try every feature free?

14-day trial, 10 email generations, no credit card required.

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