Litmus Extension
Test HTML emails on your desktop or in your email provider
Litmus Extension launched on August 23, 2017 with 6 votes, #1,343 of 3,214 launches that month. The site was still online in September 2026, 9 years on.
What it does
Preview and test HTML emails directly on your desktop or within your email service provider with Litmus’ chrome email extension technology integration.
Personalize, preview, and test emails directly on your desktop or within your email service provider. Personalize emails in seconds with engaging open-time personalization elements. Plus, test emails across 100+ email clients and devices and perform other essential pre-send checks to ensure every email is pixel-perfect. “I use the Litmus Extension every day! I love the flexibility it offers for working with local files, whether it’s a hand-built HTML file or one rendered on a localhost. It gives me the shortest possible feedback loop so that I can build, troubleshoot, and hack to my heart’s content. It definitely helps me shave down my dev time.” “The Litmus Extension is as magical and…from litmus.com
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