Newsletter Section Splitter
A long post, cut into newsletter sections at the seams it already has.
- 100% success
Tool input
Overview
About this tool
Splits a post into sections at paragraph boundaries, keeping any headings you already wrote and balancing on length only when there are none. Drafts a bracketed placeholder subhead for each unheaded section, drawn from that section’s own first sentence. Nothing is rewritten — every word in the output is a word you wrote.
Instructions
How to use it
Paste the post. If it already has markdown headings, those are the section boundaries and the length setting is ignored — your structure beats the arithmetic.
Why the split is never inside a paragraph
A section that runs long reads better than an argument cut in half, and a paragraph is the smallest unit you actually composed. When there are no headings, sections are balanced by choosing the break that leaves them nearest to even rather than filling greedily — which is what leaves a two-line section at the end.
The subheads are placeholders on purpose
Each drafted subhead is in square brackets and taken from the section’s opening sentence. A generated subhead that reads like finished editorial is the one that ships unedited, and the subhead is the line a skimming reader reads instead of the paragraph.
Questions
Frequently asked
How long should a newsletter section be?
About a minute of reading — roughly 220 words — is the default here. A section is the unit a reader decides to skip, so one longer than two minutes is one the scroll thumb jumps over whole.
Does it rewrite my post?
No. Every word in the output is a word you wrote. The only additions are the section headings, and those arrive in square brackets so they cannot be mistaken for finished copy.
What if my post already has headings?
They win. The tool splits on them and ignores the length setting entirely — your structure is better information than a word count.
Why does it never split a paragraph?
Because a section ending mid-argument is worse than a section that runs a little long, and a paragraph is the smallest unit an author actually composed.
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