Turn a Blog Post into a Newsletter with Claude

Don't paste the whole post into an email. Give Claude the article, your audience and the one action you want, and ask for a newsletter built around a single idea: five subject line options, preview text, a short personal opening, the key takeaway, one example and one link back to the full post.

  • By Praveen Jha · Updated 2026-10-22 · 7 min read · Content & writing
Best for
Bloggers, coaches and founders with an email list
Time
15 minutes per issue
Cost
Works on any Claude plan
Works in
claude.ai, Claude Desktop; paste into any email platform
Level
Beginner

A newsletter is not a shorter blog post

A blog post is found through search and read when someone needs it. A newsletter arrives uninvited and competes with every other email. It needs one clear idea, a reason to care in the first two lines, and a single next step. Claude is good at this compression, as long as you tell it which idea matters.

Step 1: Decide the one idea and one action

Before opening Claude, write two lines: the one thing a reader should remember, and the one thing you want them to do (read the full post, reply, book a call). Everything else in the article stays on the blog.

Step 2: Give Claude the right inputs

  • The full article, or its URL if Claude can read it in your setup.
  • Who the list is and what they signed up for.
  • The one idea and one action from Step 1.
  • Two or three past issues that performed well, so the format matches what your readers expect.
  • Your voice guide or custom Style if you have one.

Step 3: Use a fixed structure

  1. Subject line: short and specific. Ask for five options and pick one.
  2. Preview text: one line that adds to the subject rather than repeating it.
  3. Opening (2-3 sentences): a personal or concrete hook, such as a client question or a mistake you made.
  4. The idea: the key takeaway in plain words, with one example.
  5. One action: a single link or button, with the benefit of clicking stated.
  6. Sign-off: your name, and an invitation to reply if replies matter to you.

Step 4: Edit, then paste into your platform

Read the draft aloud. Cut anything that repeats the article without adding to the one idea. Then paste it into your email platform, add your links and send a test to yourself on mobile, where most people will read it.

Make it a skill: If you do this every week, save the structure as a repurposing skill or as instructions in a Newsletter project, so each issue starts from the same format.

Copy-paste prompts

Blog to newsletter

Turn this article into a newsletter for [describe list]. The one idea is: [idea]. The one action is: [action + URL]. Give me 5 subject lines, preview text, a 2-3 sentence opening, the idea with one example, the call to action and a sign-off. Under 300 words. [paste article]

Subject line test

Write 10 subject lines for this newsletter: [paste]. Mix curiosity, specific benefit and question formats. Keep each under 50 characters and say which two you would test against each other and why.

Tighten the draft

Cut this newsletter by a third without losing the one idea or the call to action. Remove anything that repeats the article. [paste draft]

Troubleshooting

  • The newsletter reads like a summary You did not choose one idea. Pick one takeaway and leave the rest on the blog.
  • Too many links Keep one main call to action. Extra links split attention and make the next step unclear.
  • It doesn't sound like you Add past issues and your voice guide to the inputs, or run the draft through your brand voice style.
  • Facts drift from the article Tell Claude to use only facts from the article, then check numbers and names before sending.

FAQ

Can Claude write my newsletter?

Claude can draft it well if you give it the source article, your audience, the one idea and the action you want. Review and edit before sending, especially facts and links.

How long should a newsletter made from a blog post be?

Long enough to deliver one idea and one action. For a teaser that sends readers to the full post, 150-300 words is a common range.

Should I send the full blog post by email?

Usually not. Send one idea and link to the full post. Readers skim email, and the full article is easier to read on the page.

Which email platform works with this?

Any of them. Claude produces the text; you paste it into Mailchimp, Kit, beehiiv, Substack or your own platform and add links and formatting there.

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