What it does
Letterfork takes a newsletter issue, supplied as a link or as pasted text, and returns a draft for each of seven platforms: LinkedIn, X, Bluesky, Substack Notes, Threads, Instagram and Reddit. The site says it works with Substack, Beehiiv and Ghost, and that the drafts arrive about a minute after you submit an issue. Setup is a one-time step. You provide five to ten of your past newsletters, and Letterfork extracts a description of your sentence rhythm, opening habits, vocabulary and humor, which it reuses on later rewrites. The site says it also applies platform conventions such as thread pacing, hook structure and caption length, and that your newsletters are not used to train models. Output is plain text with a copy button for each piece, and the site states that nothing is published automatically. Link reading only works on publicly visible pages, so a paywalled issue has to be pasted in as full text.
Capabilities
- Drafts for LinkedIn, X, Bluesky, Substack Notes, Threads, Instagram and Reddit from one issue
- Style profile built once from five to ten of your past newsletters
- Accepts a newsletter link or pasted text
- Plain-text output with a copy button for each piece
- No auto-publishing, so you post the drafts yourself
- Applies platform conventions such as post length and thread pacing
When to use it
- Newsletter writers on Substack, Beehiiv or Ghost who want social drafts without reshaping each issue by hand
- Keeping a consistent personal voice across several platforms
- Repurposing a paywalled issue by pasting its full text
Alternatives to explore
- Repurpose.io
- Typefully
- Supergrow
