Subject Line Tester
Generates and scores subject line options before you spend a test on them.
by aaron-he-zhu · ★ 3,012 on GitHub
What it does
Give Claude your email topic and sender name. Claude writes several subject line and preview text options, then flags issues like spam-trigger words, length problems, or too many emojis, and shows how each would look in an inbox preview. You get a shortlist of your strongest options ready to test.
Who it’s for
A good fit for marketers, founders and anyone promoting a business and writers, coaches and content creators.
Do you need to code?
No. You can use this without writing or editing any code.
How to install
Add it as a skill, or as part of its plugin. This skill also ships inside a plugin, so you can upload just this skill to Claude, or install the whole plugin it comes in. See the step-by-step guide.
Safety note
Nothing specific was flagged when we reviewed this listing.
As with any add-on, only install skills from sources you trust, and read what it does first.
License
Apache-2.0