Letterfork

Your newsletter, 5 platforms,
60 seconds

Letterfork rewrites every issue into LinkedIn posts, X threads, Substack Notes, Threads, and Instagram captions. In your voice. No more 3-hour Sunday-night repurposing.

Try free. No credit card.See pricing

3 free rewrites · cancel any time · works with Substack, Beehiiv, Ghost

From newsletter to social, in your voice

The same piece, reshaped for each platform, in the way you write.

Your newsletter (excerpt)

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 fighting with character limits.

I talked to about thirty other writers about this recently. Some have 500 subs, some have 50,000. The consensus? Everyone absolutely hates this part. Some refuse to do it and abandon social media entirely. Others pay a VA $500 a month to handle it. Most just half-ass it with a generic "New post out, link in bio" and call it a day.

None of those felt like the right answer.

→ LinkedIn post

15 hours a month.

That's how long I spend doing glorified data entry on my own words. Not researching. Not talking to users. Just copying, pasting, trimming, and fighting with character limits. One newsletter, five platform-native posts, every single week.

I asked around. About 30 newsletter writers, 500 to 50K subs. Same answer every time: everyone hates the repurposing tax.

Here's what writers actually do about it:
→ Some quit social entirely.
→ Some pay a VA $500/month to handle it.
→ Most just post "new piece out, link in bio" and move on.

None of those felt like the right answer.

So I'm building one.

→ X thread (1/4)

I spend 15 hours a month doing glorified data entry on my own words.

Writing the newsletter takes 2-3 hours. I love that part. Reshaping it for 5 platforms eats another 3-4. Every. Single. Week.

Asked 30 other writers about this. Everyone hates it. No one has a clean fix.

How Letterfork works

Three steps. The first one happens once.

1

Train your voice

Drop in 5–10 of your past newsletters. Letterfork extracts your sentence rhythm, opening habits, vocabulary, and humor. Once.

2

Paste a newsletter

URL or full text. Substack, Beehiiv, Ghost, or anything else. Letterfork pulls the title, author, and body in seconds.

3

Copy & post

60 seconds later: LinkedIn posts, X thread, Substack Notes, Threads, Instagram captions. One Copy button per piece.

Super

building Letterfork in public

I built Letterfork because I was spending 4 hours every week reshaping my own newsletter for five platforms, and none of the tools I tried understood how I write.

The MVP just launched. I'm looking for newsletter writers who'll try it and brutally tell me what works and what sucks. If you write a newsletter at any size, you're who I built this for.

Reply to any email I send and it lands in my inbox. I read every one.

Get back your Sunday night

Stop spending 3 hours reformatting your newsletter for every platform. 3 free rewrites. No credit card.

Start free

Questions, answered

How is this different from ChatGPT?

ChatGPT doesn't know your voice. You'd spend 30 minutes per platform crafting a prompt, and even then the output reads generic. Letterfork extracts your style once, then reuses it forever. It also ships platform-native formats (X thread pacing, LinkedIn hooks, IG hashtags) without you specifying them.

Which platforms are supported?

Five at launch: LinkedIn posts, X (Twitter) threads, Substack Notes, Threads, and Instagram captions. Reddit and Medium are on the roadmap.

Can I edit the output?

Yes. Every output is plain text, copy-pasteable. We don't auto-publish; you stay in control.

Do you train on my newsletters?

No. Your past newsletters are used to extract a one-time style description that lives in your account. We never train models on your content, and your data is never shared.

What if my newsletter is paywalled?

Paste the full text directly. Letterfork's URL parser only works on publicly visible newsletter pages.