Tools that simplify email testing and analytics.

Every email client is different. See exactly how your email looks in the most popular inboxes, so you can fix any problems before you hit send.

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Email Testing

Look impeccable in the inbox.

Email renders differently in every email client. Gmail or Outlook? iPhone or Android? We’ve got you covered with these popular clients and many, many more. Preview your email in 49 different email clients and mobile devices in seconds.

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We play nice with your existing email service provider.

Salesforce Marketing Cloud
Vertical Response
Campaign Monitor

Spam Testing

Make it to the inbox, not the spam folder.

Test against 23 spam filters and 72 of the most common blacklists to diagnose and solve deliverability issues. Generate a report with pass/fail feedback in Google Apps, SpamAssassin, Barracuda and more.

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Spam Testing UI

Advanced Email Analytics

Track more than just opens and clicks.

Get the most comprehensive email analytics available, all in one place.

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Engagement Chart Client Tracking Chart Geolocation Chart
Gerry Foster

Email on Acid taught me everything I needed to know, answered all of my questions, and never treated me like anything but a valued customer.

More Features

Even more tools to perfect your emails.

We're always working to provide you with innovative features to simplify email testing.



Don’t let image blocking get in the way of your message. Convert your images into mosaics or formatted HTML text with Mozify.
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Web Page Preview

Web Page Preview

Ensure a flawless email campaign experience from start to finish. Test your landing pages in every popular web browser with just one click.
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Need help? Plug in your code and we'll automatically apply fixes and offer recommendations for consistent rendering.
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Design Inspiration

Design Inspiration

Spark your creativity or keep tabs on market trends with our library of over 1 million emails from 30+ industries.
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