sub2mark-lib

Converts Substack posts to Markdown.

Currently supports free posts only.

Install

npm install sub2mark-lib

Library Usage

import { convertSubstackToMarkdown, convertSubstackToZip } from 'sub2mark-lib';
// Note: The link used here does not exist. Use a real one.
const result = await convertSubstackToMarkdown('https://example.substack.com/p/my-post', {
  outputDir: './output',
  mdFilename: 'post.md'
});

console.log(result.postDir);

const zipResult = await convertSubstackToZip('https://example.substack.com/p/my-post', {
  outputDir: './output',
  zipName: 'my-post.zip'
});

console.log(zipResult.zipPath);

CLI Usage

sub2mark https://example.substack.com/p/my-post --out ./output --zip

Notes

• Requires Node.js 18+ (for fetch).
• The converter downloads images and stores them under ./output/<slug>/images.