Free EPUB Converter for Amazon KDP & IngramSpark Pro

This free EPUB converter is built and maintained by Kidillus Studio, a professional children’s book illustration platform.

1,270 books converted successfully

Recommended: 1600x2560px JPG

Upload .DOCX. Use Heading 1 for Chapters.

Upload DOCX File

Click to browse (Max 1GB)

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📚 Publish Like a Pro: The Ultimate Free EPUB Converter for KDP & IngramSpark

Writing a book is a journey of passion. But formatting it for Amazon KDP? That’s often a journey of frustration.

Broken layouts, rejected files, expensive software, and confusing error messages—we’ve all been there. You spend months writing your story, only to get stuck at the final step.

Not anymore.

Meet Kidillus Publisher, a professional-grade, 100% free tool designed to convert your manuscripts into valid, error-free EPUBs. Whether you are writing a text-heavy novel or a vibrant children's picture book, we’ve got you covered.

🌟 Why is Kidillus Publisher Different?

Most free converters have a 50MB limit or produce "messy code" that Amazon rejects. Here is why Kidillus stands out:

1. Massive 1GB File Support 🚀

Got a heavy comic book or a graphic novel? No problem. Our smart Chunk Upload Technology breaks your file into small pieces and uploads them seamlessly. No timeouts, no server crashes.

2. Two Specialized Modes 📖

We don't use a "one-size-fits-all" approach.

  • Novel Mode (Reflowable): Perfect for storybooks where users can change font size.
  • Picture Book Mode (Fixed Layout): Perfect for comics and kids' books where illustrations must stay exactly where you placed them.

3. 100% KDP & Accessibility Compliant ✅

Amazon loves our files. Our tool automatically adds:

  • Alt Text & ARIA Roles: Making your book accessible to screen readers.
  • Valid Metadata: ISBN, Publisher info, and correct dates.
  • Table of Contents: Both NCX and NAV formats for perfect navigation.

🛠️ Feature Breakdown: Which Mode Should You Use?

🅰️ Novel / Text Mode (Reflowable EPUB)

Best for: Novels, Short Stories, Biographies, Poetry.

Input File: .DOCX (Microsoft Word).

How it works: It takes your text and allows it to "flow." This means readers can increase the font size, change the background to Night Mode, or change the font style on their Kindle.

  • Pro Features Included:
  • Custom Styling: Choose between Modern (Sans-Serif) or Classic (Serif) fonts.
  • Drop Caps: Make your chapter start look professional with a big first letter.
  • Auto-Chapter Detection: It automatically finds your chapters based on "Heading 1".

🖼️ Picture Book Mode (Fixed Layout EPUB)

Best for: Children's Books, Comics, Graphic Novels, Photography Books.

Input File: .PDF.

How it works: It freezes your layout. If you placed an image on the left and text on the right in your PDF, it will stay exactly the same on an iPad or Kindle Fire.

Visual Quality: We use high-resolution processing to ensure your illustrations look crisp and vibrant.

📝 Step-by-Step Guide: How to Convert Your Book

Ready to publish? Follow this simple 5-step process.

  1. Step 1: Select Your Format: Choose Novel for Word docs or Picture Book for PDFs.
  2. Step 2: Enter Book Details: Title and Author are mandatory. ISBN and Publisher are optional but recommended.
  3. Step 3: Upload Your Cover: Upload a JPG/PNG. We resize it and tag it correctly.
  4. Step 4: Formatting Options (Novels): Customize fonts and drop caps.
  5. Step 5: Upload & Convert: Drag your file, wait for the green bar, and click Start!

💡 Important Tips for Best Results

  • For Novels (.DOCX): Make sure your Chapter Titles (e.g., "Chapter 1") are styled as Heading 1 in MS Word. Our tool uses this to build your Table of Contents. Use *** or --- on a new line to create a decorative Scene Break.
  • For Picture Books (.PDF): Ensure all your pages are the same size in the PDF. High-resolution images work best (300 DPI recommended).

❓ Frequently Asked Questions

Q: Is the output compatible with the latest EPUB 3.3 standards?

A: Yes. Our engine generates Valid EPUB 3.3 files.

Q: Max file size?

A: Up to 1GB supported via chunk upload.

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