Substack Post Writer guide
Write Substack newsletters with subject lines, preview text, and growth hooks
How to use it
Three steps to a result
Open the tool
Sign in free and open Substack Post Writer.
Fill in the inputs
Topic, Target Keyword.
Review and use the output
Copy, export or save the result, and check the data label to see how it was produced.
Details
What to expect
AI writerWhere the data comes from
Produces original content (titles, schema, posts). No external data lookup.
Free tier2/day
Hit the cap? Add your own API key in Settings → API Keys for unlimited use at cost, or upgrade your plan.
What you need to provide
- TopicExample: e.g., Weekly SEO insights
- Target KeywordExample: e.g., seo newsletter
Ready to try Substack Post Writer?
Free to start. No credit card.