About MailViewr

The Problem Nobody Admits

Here's something that happens at almost every company — from scrappy e-commerce startups to large telecom corporations.

Someone needs an HTML email template. The task lands on the developer's desk. The reasoning? "You know HTML, right?"

And so the developer — who was hired to build interfaces, not emails — now has to figure out why the carefully crafted template looks perfect in Chrome but arrives completely broken in Outlook. Or why the layout collapses on an iPhone. Or why Gmail strips half the styles without warning.

The cruel part: the same companies that expect their developers to solve this problem won't approve budget for tools that actually help. Litmus costs $99/month. Email on Acid isn't cheap either. The answer from management is always the same — "just figure it out."

We know this because we've lived it. Across multiple organisations, multiple industries, multiple email disasters. Every time, the same pattern: developer handed an email task, no tools, no budget, no support.

Why We Built MailViewr

We had this idea floating around for a while — talked about it over coffee, debated it in chat groups, shared our frustrations. Eventually, we stopped waiting for someone else to solve it and decided to build it ourselves.

The goal was simple: give developers — and anyone else stuck with an email task — a proper tool. One that shows exactly how an email renders across Gmail, Outlook, Apple Mail, and mobile clients. One that flags compatibility issues before they reach a real inbox. One that doesn't require a company purchase order or a credit card.

How It Works

MailViewr isn't just a browser window with your HTML dropped in. Every email client — Gmail, Outlook, Apple Mail, iOS, Android — has its own rendering rules. Gmail strips styles it doesn't support. Outlook uses a decades-old rendering engine. Apple Mail handles things differently again.

MailViewr maintains an internal compatibility library built from real-world email client behavior, continuously updated as clients evolve. When you paste your HTML, each preview applies that client's specific rules — so what you see reflects what your recipient actually sees, not what Chrome thinks it looks like.

Each preview is also calibrated to the actual viewport dimensions and zoom behavior of the target device or application. The layout, spacing, and proportions you see match the real reading experience.

Who MailViewr Is For

• Frontend developers handed an email task and given no tools to test it
• Freelancers who can't justify a $99/month subscription for occasional email work
• Small businesses and solo marketers who need to check their emails before sending
• Email developers who want a fast, frictionless second opinion before hitting send

If you've ever sent an email that looked perfect on your screen and broken in someone else's inbox — this tool is for you.

What's Next

The core of MailViewr will always be free. That's not a marketing line — it's the point. The tool exists because paid tools weren't accessible to the people who needed them most. The free experience will never go away.

We're continuously expanding client coverage, improving compatibility detection, and building advanced features for teams and power users who need more.

Get In Touch

If you have feedback, found a bug, or just want to say the tool saved you from an email disaster — reach out.

Built in Bangalore, used everywhere.