Great Way To View Emails With Unlimited Testing
Great Way To View Emails With Unlimited Testing
By Gareth
Saturday, November 7, 2026 · Customer reviews of US businesses

The Fair Hearing score
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65 reviews
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Honesty, pricing, process and quality scores appear once 5 customers have rated them.
Use Email on Acid to test your emails across the most popular clients, apps and devices, then go further to measure performance, find and fix errors - even if you don't know HTML. Free Trial.
Email on Acid (emailonacid.com) has 65 customer reviews on The Fair Hearing, with an average rating of 3.8 out of 5.
65 approved reviews, newest moderated first
Great Way To View Emails With Unlimited Testing
By Gareth
Email on Acid (EOA) is a great way to preflight your emails on multiple devices. I used EOA at my previous employment to help troubleshoot the coding of email designs created by myself and the UX team in support of company marketing efforts. The ability to see how emails will probably display in so many viewports is extremely helpful in planning layouts, and in understanding the challenges faced by end-users, even highlighting ADA compliance issues. My only grumble about EOA is I did not see any data/statistics on how many people actually used and/or viewed email on specific devices or viewports. They provide display examples for so many devices and viewports it can be a bit overwhelming. If one device/viewport is only used by a small percentage of your audience, that makes it an edge-case, and thus it could be decided not to worry about whether that particular device/viewport is worth sweating over. If EOA were to provide easily referenced data on device and viewport usage statistics, that would help inform decisions as to how to better customize the testing experience.
By Judy T.
Terrible tool doesn’t catch multiple rendering issue and only support response is ‘each tool is different’
By Bryan
Response from Email on Acid· Jul 21, 2021
If you can please submit this to our support team using [email protected], they will gather all of the details and share this as feedback to our teams. We really appreciate it!
A very comprehensive and easy to use tool.
By Maria
This tool is helpful for testing email for different email clients.
By Dev
the process time for the test is higher than expected, also, I need to refresh multiple times before the most recent test shows even though I received the notification as sent.
By Jess
Response from Email on Acid· Apr 8, 2021
We are sorry that you experienced slowness when processing a test. This is not normal, but can usually be fixed easily by contacting our support team at [email protected]. If you provide them with the test name and HTML, they can help identify the cause for any delays. When sending a test, we also may be able to help you find the second email address we offer to send to EOA from your ESP. Some users find one email format is faster than the other.
I have been using Email on Acid for over 5 years now. It’s become and invaluable tool to deliver emails that work well both on the desktop and mobile. Needless to say, the preview screens have saved me a ton of money in hardware.
By Juan
Very happy. It's lower cost than some other alternatives, and super fast.
By Michael