The Email Dev Suite
That Ends The Rest.

Pre-Flight Email IDE

Multi-audit development workspace with concurrent code compilers, WCAG audit, X-Ray scan, and test email delivery.

Email-expert prompt engine

Describe a campaign in plain English and generate Outlook-safe MJML layouts built on best practices.

Div-to-Table transpiler

Translate standard CSS flexbox and block elements into Outlook-compliant nested tables automatically.

Countdown & personalize

Self-host real-time countdown timers and name graphics on Vercel at $0 cost.

Stateful layout builder

Generate interactive accordions, tab switchers, and carousels with checkbox CSS hacks and Outlook fallbacks.

Gmail clipping protection

Shake off unused CSS, minify HTML, and obfuscate class names to protect deliverability under 102KB.

In-Inbox shopping carts

Compile interactive cart modules calculating price totals using CSS Counters and state-dependent URL routers.

Email-safe vector graphs

Compile responsive charts and progress bars purely out of email-safe tables. Renders cleanly everywhere.

The free Litmus alternative

Simulate how 14 email clients render your email. Browser-native, zero server calls, instant preview.

Competitive espionage

Spy on ESPs, detect tracking pixels, uncover A/B tests, and assess campaign privacy scores.

EU Accessibility Act ready

Scan email code against WCAG 2.1 AA benchmarks. Fix contrast, font-sizes, image ratios, and table roles.

Outlook-proof layouts

Convert modern MJML layouts into bulletproof nested HTML tables. Pixel-perfect in every inbox.

Bypass Gmail's CSS block

Strip global style blocks and inject properties directly into HTML tags. Gmail-ready in seconds.

See before they see it

Simulate how email clients force dark mode on your email. Fix contrast issues before sending.

Maximize deliverability

Audit your copy against 150+ known spam trigger phrases. Get an inbox delivery risk score instantly.

Control the preview text

Generate hidden preheader HTML that controls the snippet shown in inbox previews on all clients.

Round buttons in Outlook

Generate hybrid VML + HTML buttons that preserve rounded corners in Outlook 2013–2019.

Bypass image blocking

Encode PNG/SVG/JPG files into base64 data URIs. Embed brand icons that can't be blocked.

Perfect analytics tracking

Build flawless UTM-tagged URLs with zero typos. Reliable campaign attribution every time.

A/B test without sending

Score your subject lines against power-word databases, emotional tone analysis, and mobile preview length.

Version comparison

Side-by-side HTML email differ. See exactly what changed between two versions at a glance.

WCAG AA/AAA compliance

Instantly check color contrast ratios for email text/background pairs with dark mode impact analysis.

Email-safe font fallbacks

Visually build and order email-safe font fallback chains with live preview. Export as CSS or inline styles.

1-Click Add to Calendar links

Generate responsive add-to-calendar invite widgets for Google, Outlook, Yahoo and Apple Mail clients.

Outlook-safe signature lines

Create responsive email signatures with nested tables. Copy as rich visual layout or raw HTML.