Turn your Substack issue into Substack Notes — in your own voice
Letterfork rewrites every Substack issue into 1–2 Notes that hit the 150–280 word algorithmic sweet spot, end in a question or stance the reader can engage with, and avoid external links — which the Substack Notes feed actively penalizes. The output is in your voice, not generic AI prose. Free for your first 3 rewrites.
Why Notes is the most underrated growth channel for Substack writers
Substack Notes is the only social channel where the audience is already pre-qualified for newsletter content — every reader is, definitionally, on Substack. The algorithm surfaces Notes from writers you don't follow if engagement is high, which means a single restack can put you in front of thousands of newsletter-curious readers.
Most writers undershoot Notes. They post a one-liner and a link to their newsletter, the algorithm reads it as low-effort drive-by promo, and the Note dies. Notes that win do the opposite: they're standalone arguments that make the reader want to restack, with the underlying newsletter as background, not as the point.
Letterfork's Notes output is built for this pattern. 150–280 words. Opens with a hook (a number, a contrarian claim, a personal moment). No external links. Ends with a question or a stance — the two things that drive replies and restacks.
How to turn a Substack issue into Substack Notes
- 1
Set up your voice profile
Paste 5–10 past Substack URLs. Letterfork learns how you write — sentence rhythm, openings, humor — once.
- 2
Paste your latest Substack URL
Public URL or full text. Letterfork extracts the title, byline, and body.
- 3
Select Substack Notes from the platform list
On the rewrite form, uncheck other platforms. Notes-only = one LLM call ≈ 12 seconds.
- 4
Generate
Letterfork produces 1–2 Notes, each 150–280 words, no external links, ending in a question or stance.
- 5
Copy and post to Substack Notes
Open Notes on Substack, paste, publish. If Letterfork produced two Notes, post the second a day or two later — algorithm rewards consistency.
What the output looks like
Substack Note · 1 of 2
I asked thirty newsletter writers (500 to 50,000 subs) what they actually do with the repurposing problem. The answer was unanimous and depressing: nobody has a clean fix. Some quit social media entirely. Some pay a VA $500 a month. Most just post "new piece, link in bio" and call it done. None of those are answers I'd give a friend who asked for advice. They're capitulations dressed up as systems. The writers who do it well treat each platform as a separate writing project — a newsletter, a thread, a Note, a Reddit essay. The work isn't the writing. The work is figuring out what shape the same idea takes in seven different formats. Which is exhausting at scale. So most writers do nothing. Which compounds. What's your version of this — what part of the work has no clean fix?
FAQ
Why doesn't Letterfork add a link to my Substack at the end of the Note?
Substack Notes' algorithm penalizes external links — including links to your own newsletter — by suppressing reach. The most-restacked Notes are standalone pieces that make the reader want to engage, with the newsletter as context, not as the point.
How long should a Substack Note be?
150–280 words is the sweet spot. Notes longer than ~280 words get folded behind a "show more" cut, killing the engagement signal. Letterfork enforces this range.
Can I post multiple Notes from one newsletter?
Yes. Letterfork outputs 1–2 Notes per rewrite. Post the first immediately and the second a day or two later — Substack rewards posting frequency, but back-to-back Notes from the same writer can feel spammy.
Will the Notes still sound like me, or like ChatGPT?
Letterfork extracts your voice from your past Substack issues — sentence length, opening style, vocabulary, humor — and applies that fingerprint to every Note. If you write with em-dashes and lowercase first words, it does too.
What's the difference between a Note and a Substack Chat message?
Notes are public; Chat is for paid subscribers. Letterfork only generates Notes content (public-facing). For Chat, write the message directly — that audience already pays you and doesn't need the algorithmic optimization.
Should I always end a Note with a question?
Most of the time, yes. Notes that end in a question or a clear stance the reader can agree or disagree with see roughly 3-5x the reply rate of Notes that end with a summary or a link. Letterfork's output ends with one or the other by default.