Turn a Substack newsletter into LinkedIn posts

Problem

If you searched how to add Substack to LinkedIn, decide which job you mean. You can show the publication link on your profile when LinkedIn makes a suitable profile section available, share one issue in a post, or turn the issue into several LinkedIn posts. Letterflow handles the third job without requiring a direct Substack integration.

• Profile link: add the Substack URL to an available profile area such as Featured, then check how it appears to other members.
• Single issue: write a useful LinkedIn post first, then include the Substack link when the full issue is the natural next step.
• Ongoing promotion: paste the full issue into Letterflow and create several standalone LinkedIn angles from the same source.
• No direct connection is required for repurposing; the finished Substack text is enough.

Workflow

Use the finished issue as the source, pull one useful idea at a time, and keep review before publishing. The goal is a small set of editable drafts, not a pile of generic summaries.

• Paste the full Substack issue: Start with the complete issue so Letterflow can use the argument, examples, links, and phrasing instead of guessing from a headline.
• Pull out distinct LinkedIn angles: Create posts for the main idea, a practical lesson, a story or example, and a final reminder that points back to the full issue.
• Edit and schedule the best posts: Keep each post useful before the link, tighten the wording, then schedule the strongest drafts while the issue is still fresh.

Example Transformation

Better promotion shares one useful idea from the newsletter instead of simply announcing that it is live. The post should make sense to someone reading it in the feed.

• Weak post: New issue is live. Read it here.
• Better LinkedIn post: Most newsletter promotion fails because it only tells people a new issue exists. A stronger post gives readers one useful idea from the issue first, then points them to the full piece.
• Better X post: One newsletter issue should create more than one launch post. Pull out the claim, the lesson, the quote, and the practical takeaway.
• Subject line angle: One issue, five stronger promotion angles.
• Pull quote: Give readers the idea before you ask for the click.

Review before publishing

Letterflow gives you editable drafts rather than publishing automatically. Review each post to ensure it is accurate, useful, and still sounds like you.