{
  "name": "Stack to Book",
  "url": "https://stacktobook.com",
  "category": "Newsletter-to-Ebook Converter",
  "description": "Free browser-based tool that converts any public Substack newsletter into a Kindle-compatible EPUB ebook. No signup required.",
  "founder": {
    "name": "Nikunj Kothari",
    "url": "https://nikunjk.com"
  },
  "pricing": {
    "free": {
      "description": "Full newsletter conversion to EPUB",
      "features": ["Unlimited conversions", "Gallery sharing", "All e-reader formats"]
    },
    "premium": {
      "price": "$9.99",
      "unit": "per book",
      "currency": "USD",
      "features": ["AI-generated cover art", "Professional introduction", "Author bio", "Chapter selection", "Featured gallery placement"]
    }
  },
  "product": {
    "inputFormat": "Substack newsletter URL",
    "outputFormat": "EPUB 3.0",
    "supportedURLFormats": [
      "example.substack.com",
      "substack.com/@author",
      "Custom domains pointing to Substack"
    ],
    "conversionTime": "Under 60 seconds for most newsletters",
    "paywalledContent": "Automatically skipped",
    "requiresSignup": false,
    "requiresInstallation": false
  },
  "compatibleDevices": [
    "Amazon Kindle (via Send to Kindle)",
    "Apple iPad / iPhone (Apple Books)",
    "Kobo e-readers",
    "Nook e-readers",
    "Android (Google Play Books, Moon+ Reader)",
    "Any EPUB-compatible reader"
  ],
  "pages": {
    "homepage": "https://stacktobook.com",
    "gallery": "https://stacktobook.com/gallery",
    "guides": "https://stacktobook.com/guides",
    "forWriters": "https://stacktobook.com/for-writers",
    "faq": "https://stacktobook.com/faq",
    "about": "https://stacktobook.com/about",
    "privacy": "https://stacktobook.com/privacy",
    "terms": "https://stacktobook.com/terms"
  },
  "llmDocumentation": {
    "summary": "https://stacktobook.com/llms.txt",
    "full": "https://stacktobook.com/llms-full.txt"
  },
  "alternatives": [
    {
      "name": "Calibre",
      "type": "Desktop software",
      "tradeoff": "Powerful but requires installation, plugins, and manual setup per post"
    },
    {
      "name": "Pocket / Instapaper",
      "type": "Read-later apps",
      "tradeoff": "Saves individual articles only — no book structure or full archive conversion"
    },
    {
      "name": "Copy-paste to Word",
      "type": "Manual process",
      "tradeoff": "Tedious for large archives, formatting breaks, no table of contents"
    }
  ],
  "lastUpdated": "2026-02-27"
}