Letterfork

What it does

Repurposing newsletters takes hours. Letterfork shrinks it to 60 seconds. Paste your Substack or Beehiiv link, and get 7 platform-native posts (LinkedIn, X, Bluesky, Threads, Reddit, etc.) generated in your exact tone. No generic ChatGPT speak. Our voice-cloning model learns your writing style. Outputs come pre-formatted with platform-specific rules (LinkedIn hooks, Bluesky chunks). One paste. Seven platforms. Your exact voice. Free to try, no CC required.

Turn one newsletter issue into 7 platform-native social posts — LinkedIn, X, Bluesky, Substack Notes, Threads, Instagram, Reddit — in your own voice. Free for 3 rewrites.

Letterfork is the AI tool that turns one Substack, Beehiiv, or Ghost issue into LinkedIn posts, X threads, Bluesky posts, Substack Notes, Threads, Instagram captions, and Reddit drafts — in 60 seconds, in the way you already write. Free for your first three rewrites. The same piece, reshaped for each platform, in the way you write. I write one newsletter a week. The writing itself takes 2-3 hours, and I actually enjoy that part. But the "repurposing" tax—reshaping that one piece for five different platforms—eats another 3-4 hours. That's roughly 15 hours a month I spend doing glorified data entry on my own words. Not researching. Not talking to users. Just copying, pasting, trimming, and…from letterfork.com

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