Litmus

Name: Litmus
Rating: 4.47 (40 reviews)
Author: litmus-plugin-admins

Personalize & test emails with Litmus—wherever you build.

As of May 2026, Litmus has 4,000 users and a 4.47/5 rating from 40 reviews in the Developer Tools category.

litmus-plugin-admins Developer Tools

Chrome Web Store ↗.crx

Users0%

4.0K

4,000

Rating0%

4.47

40 reviews

Reviews0%

Version

1.2.1

Manifest V3

History

2 snapshots

Tracking since Apr 20, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 20, 2026	4.0K	4.47	40	1.2.1
May 6, 2026	4.0K	4.47	40	1.2.1
Now	4.0K	4.47	40	1.2.1

Permissions & access

Permissions: tabsscriptingstoragecookiesclipboardWriteoffscreen
Host access: file://*, http://localhost/*, *://litmus.localhost/*, http://127.0.0.1/*, *://*.adobe-campaign.com/*, *://experience.adobe.com/*, *://*.mailchimp.com/*, *://*.campaignmonitor.com/*, *://*.createsend.com/*, *://*.exacttarget.com/*, *://*.pardot.com/*, *://cloud.goacoustic.com/*, *://*.marketodesigner.com/*, *://*.marketingcloudapps.com/*, *://*.exacttarget.com/cloud/#*, *://members.exacttarget.com/*, *://members.s1.exacttarget.com/Content/Email/*, *://members.s2.exacttarget.com/Content/Email/*, *://members.s3.exacttarget.com/Content/Email/*, *://members.s4.exacttarget.com/Content/Email/*, *://members.s5.exacttarget.com/Content/Email/*, *://members.s6.exacttarget.com/Content/Email/*, *://members.s7.exacttarget.com/Content/Email/*, *://members.s8.exacttarget.com/Content/Email/*, *://members.s9.exacttarget.com/Content/Email/*, *://members.s10.exacttarget.com/Content/Email/*, *://members.s11.exacttarget.com/Content/Email/*, *://members.s12.exacttarget.com/Content/Email/*, *://members.s13.exacttarget.com/Content/Email/*, *://members.s14.exacttarget.com/Content/Email/*, *://members.s15.exacttarget.com/Content/Email/*, *://*.eloqua.com/*, *://*.eloquaeditors.com/*, *://user-content.s1.sfmc-content.com/*, *://user-content.s2.sfmc-content.com/*, *://user-content.s3.sfmc-content.com/*, *://user-content.s4.sfmc-content.com/*, *://user-content.s5.sfmc-content.com/*, *://user-content.s6.sfmc-content.com/*, *://user-content.s7.sfmc-content.com/*, *://user-content.s8.sfmc-content.com/*, *://user-content.s9.sfmc-content.com/*, *://user-content.s10.sfmc-content.com/*, *://user-content.s11.sfmc-content.com/*, *://user-content.s12.sfmc-content.com/*, *://user-content.s13.sfmc-content.com/*, *://user-content.s14.sfmc-content.com/*, *://user-content.s15.sfmc-content.com/*, *://*.klaviyo.com/*, <all_urls>

Screenshots

About

Whether you’re using a local editor or your email service provider’s email editor to create emails, Litmus Extension lets you personalize, preview, troubleshoot, and optimize your email right where you build, saving you time and helping you boost email accuracy & engagement. 

You can download the Litmus Extension for free, but it requires a paid Litmus account for full access to pre-send email testing and personalization. 

Learn more and sign up: litmus.com/extension