Email QA built for developers, not screenshot farms.
Emailens replaces slow, expensive screenshot testing with real-time AST parsing and CSS transformation simulation across 21 email clients.
Why We Built Emailens
In 2026, web developers enjoy instant HMR, modern CSS Grid, and sophisticated developer tools. Yet when writing HTML emails, developers are suddenly transported back to 2007: fighting Microsoft Word's rendering engine in desktop Outlook, dealing with arbitrary 102KB clipping in Gmail, and manually coding VML ghost tables.
Traditional email testing tools force you to wait 45 to 90 seconds while a cloud VM boots up to capture a screenshot. By the time you notice an alignment bug, your focus is broken.
Emailens changes the paradigm: we parse your HTML, MJML, or React Email template directly, simulate client-specific DOM mutations in milliseconds, and give you immediate, actionable fix snippets right in your dev loop or CI pipeline.
Our Core Principles
Sub-50ms simulation so email QA happens while you type, not after you deploy.
Don't just show a broken screenshot; pinpoint the exact CSS declaration or tag Outlook stripped.
Every recommendation is validated against primary client specifications, RFC standards, and live test suites.
Native support for React Email, Tailwind v4, MJML, Maizzle, and raw HTML.
Founder & Team
Philippe is a software engineer dedicated to developer productivity and web standards. After years of struggling with email rendering quirks in marketing and transactional workflows, he created Emailens to make email development as predictable and enjoyable as modern web development.
Ready to test your emails?
Paste your HTML and see how 21 clients render it in under 500 milliseconds.
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