I Built a Free Kindle eBook Formatter (Because Vellum Costs $250 and Only Works on Mac)

Description and use

A free, browser‑based EPUB formatter that works on any OS, eliminating the need for paid, Mac‑only tools like Vellum.

Problem

Vellum, the leading eBook formatting tool, is expensive ($250), Mac‑only, and requires uploading manuscripts to its servers, making it inaccessible to Windows and Linux authors.

Outcome

A free, zero‑signup, browser‑based EPUB formatter that produces KDP‑compatible files without requiring any software installation or data upload.

Workflow

• Open https://tools.jackgreen.top/kindle-ebook-interior-formatter-as-a-vellum-alternative/ in a browser
• Paste manuscript text into the provided textarea
• Choose desired font and line spacing options
• Click "Generate EPUB"
• Download the resulting .epub file
• Upload the EPUB to KDP

Evidence

The formatter uses client‑side JavaScript to parse your manuscript, auto‑detect chapter breaks (Chapter 1, CHAPTER 2, etc.), and generate a proper EPUB 2.0 file with: Proper XHTML structure, Navigation (TOC), Professional typography, Adjustable font size and line spacing, KDP‑compatible output

Source