30 tools · 100% browser-side · zero uploads
Pre-Flight Email IDE
Multi-audit workspace with concurrent compiler tabs, WCAG audit, X-Ray scan, and test email delivery.
Div-to-Table transpiler
Translate modern flexbox and block elements into Outlook-compliant nested tables automatically.
Gmail clipping protection
Shake off unused CSS, minify HTML, and protect deliverability under Gmail's 102KB limit.
Email-safe vector graphs
Compile responsive charts and progress bars purely out of email-safe tables.
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. 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 instantly.
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 all inbox previews.
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 before sending
Score 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 campaign versions.
WCAG AA/AAA compliance
Instantly check color contrast for email text/background pairs with dark mode impact analysis.
Email-safe font fallbacks
Visually build and order email-safe font fallback chains. Export as CSS or inline styles.
B2B client audit scores
Compile a print-ready layout health scorecard to pitch e-commerce prospective clients.
Heal Outlook rendering bugs
Inject VML buttons, wrap tables, and normalize responsive markup instantly in the browser.
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.
Stateful layout builder
Generate interactive accordions, tab switchers, and carousels with checkbox CSS hacks.
Reverse spaghetti tables
Convert bloated nested tables from legacy campaigns back into clean, editable MJML code blocks.
Email-expert prompt engine
Describe a campaign in plain English and get Outlook-safe MJML code built on best practices.
Countdown & personalize
Self-host real-time countdown timers and name graphics on Vercel at $0 cost.
In-Inbox shopping carts
Compile interactive cart modules using CSS Counters and state-dependent URL routers.
Free Litmus alternative
Simulate how 14 email clients render your email. Zero server calls, instant preview.
Glance attention saliency maps
Calculate predictive subscriber attention hot spots client-side using contrast saliency maps.
3 unique articles daily
Generate E-E-A-T articles under Google's 2026 guidelines, strip AI signature clichés, and verify content safety.