Web App
Web App Overview
Use the Emailens web app to build, preview, analyze, and debug emails across all 21 major email clients.
The Emailens web application at emailens.dev provides a modern, interactive suite to build, audit, and debug emails across 21 email clients in real time.
Core Capabilities
- AI Email Builder: Generate bulletproof HTML, React Email, or MJML templates with iterative engine-driven auto-repair.
- 21-Client Side-by-Side Previews: Accurate DOM transforms for Gmail (Web, iOS, Android), Outlook (Windows, Mac, Web, iOS, Android), Apple Mail, Yahoo, Samsung Mail, Thunderbird, HEY, and Superhuman.
- 14-Point Compatibility & Quality Audit: CSS support (auto-synced with Can I Email), VML translation, spam heuristics, broken links, accessibility contrast, image weights, Gmail 102KB clipping, and mobile layout overflow.
- Dark Mode Simulation: Preview color schemes under Apple Mail (
prefers-color-scheme), Gmail Android (partial inversion), Gmail iOS (full inversion), and Outlook Web ([data-ogsc]/[data-ogsb]). - Domain Deliverability Monitoring: Track DNS health for SPF, DKIM, DMARC, MX, and BIMI with automatic drift alerts.
- API Keys & MCP Server: Manage keys, track 30-day traffic split (REST API vs Model Context Protocol), and test endpoints in-browser.
- Public Share Links: Share interactive, password-protectable previews with teammates and clients.
Plan Tiers & Limits
| Plan | Previews / Day | AI Builder | AI Fix Actions | API Keys | Monitored Domains | Price |
|---|---|---|---|---|---|---|
| Free | 30 | - | 3 lifetime | - | 1 | $0 |
| Dev | 100 | 3 / month | 10 / month | 1 | 3 | $9/mo |
| Pro | Unlimited | 30 / day | Metered overage | 10 | 10 | $19/mo |
| Team | Unlimited | 100 / day | Metered overage | 10 | 10 | $49/mo |
No credit card required for Free. Sign in with Google or GitHub to start analyzing emails.
Documentation Sections
- AI Email Builder: Natural language generation with auto-fixing
- Preview Tool & Linter: 14-point audit engine and per-client transforms
- Dashboard: Recent preview history, search, and organization
- Domain Deliverability: Continuous SPF, DKIM, DMARC & BIMI monitoring
- API Keys & MCP: API credentials, usage sparklines, and MCP connectivity
- Dark Mode Preview: Client inversion logic and contrast validation
- Sharing Previews: Collaborative share links