Turn your Substack newsletter into Bluesky posts — in your own voice
Letterfork takes one Substack issue and produces 1–3 Bluesky-native posts written the way you write — no journalism-school hot takes, no "🧵 1/" thread tics ported from Twitter. The 300-character limit is handled, the algorithm-friendly chain pacing is built in, and links render natively. Free for your first 3 rewrites.
Why Bluesky deserves a slot in your repurposing routine
Bluesky's user base passed 30 million in early 2026 — most of them came over from X looking for less aggressive engagement-bait and a transparent feed algorithm. The audience over-indexes on journalism, technology, science writing, and indie newsletter creators. If your Substack covers any of those, your readers are already there.
Unlike X, Bluesky doesn't throttle posts that contain external links. A native link card with your Substack URL renders beautifully in-feed. And unlike LinkedIn, the platform culture rewards thoughtful long-form arguments over performative growth posts — which is exactly the lane a newsletter writer naturally lives in.
The catch: Bluesky posts that read like ported tweets get ignored. Letterfork knows this. The output is pacing-aware — short opener, longer reasoning post, optional close — without the "1/" labels that immediately signal "copied from elsewhere."
How to turn a Substack issue into Bluesky
- 1
Set up your voice profile (one time, ~60 seconds)
Paste 5–10 of your past Substack URLs. Letterfork reads them and extracts a fingerprint of how you write — sentence rhythm, opening habits, vocabulary, where you use humor. You only do this once.
- 2
Paste your latest Substack URL
Drop the public Substack issue URL. Letterfork pulls the title and full body in seconds. Paywalled? Paste the text directly instead — same result.
- 3
Pick Bluesky from the platform list
On the New rewrite page, uncheck the platforms you don't need today. Selecting only Bluesky means a single LLM call and a faster result.
- 4
Hit Generate
10–15 seconds later you get 1–3 Bluesky posts under 300 characters each, written to chain naturally if there's more than one.
- 5
Copy and post
Each post has its own Copy button. Paste into Bluesky. The first post is written to work standalone in case readers see only that one in their feed.
What the output looks like
Bluesky · post 1 of 2
I spend 15 hours a month doing glorified data entry on my own words. Writing the newsletter takes 2-3 hours and I love that part. Reshaping it for five platforms eats another 3-4. Every single week.
Bluesky · post 2 of 2
Asked thirty other newsletter writers about it recently. 500 subs to 50,000 — same answer every time. Nobody has a clean fix. Most just post "new piece, link in bio" and call it done. Doesn't feel like the right answer.
FAQ
How long can a Bluesky post be?
Bluesky's hard limit is 300 characters per post (a touch more room than X). Letterfork enforces this strictly so your posts never get truncated.
Should I use hashtags on Bluesky?
No. Bluesky's algorithm doesn't reward hashtags and platform culture treats them as a signal of "X user porting old habits." Letterfork's Bluesky output weaves topic words into prose instead of tagging them.
Will Bluesky penalize me for linking to my Substack?
Unlike X, Bluesky doesn't throttle posts with external links. Link cards render natively in-feed. Including your Substack URL or a source citation is encouraged when the source is the point.
Can I post a multi-post chain (a thread)?
Yes. Bluesky supports native reply chains. Letterfork writes 2–3 connected posts when the source newsletter has enough material — the first post still works standalone in case the chain doesn't render for everyone.
Does Letterfork sound like ChatGPT?
It shouldn't. Letterfork extracts your voice from your past Substack issues — sentence rhythm, opening style, vocabulary — and applies that fingerprint to every Bluesky post. The output should read like something you'd send to your group chat, not a marketing intern.
What about my Substack-only paywalled posts?
Use the "Paste text" tab on the rewrite page and paste the full body directly. Letterfork's URL parser only works on publicly visible Substack pages.