Why EPUB Formatting Errors Happen (And How to Spot Them)
Converting a Word document to EPUB is usually straightforward, but sometimes formatting quirks slip through. Broken styles, misaligned text, orphaned paragraphs, or wonky spacing can make your ebook look unprofessional on readers' devices.
The good news: most EPUB formatting errors are predictable and fixable. The key is knowing what to look for and how to address them at the source—usually by tweaking your Word manuscript before conversion, or by making surgical edits after the fact.
Let's walk through the most common culprits and how to resolve them.
1. Inconsistent Line Spacing and Paragraph Breaks
One of the most frequent issues after converting Word to EPUB is uneven spacing between paragraphs or chapters. You might see huge gaps on one device and tight clustering on another.
Why it happens: Word's spacing settings (points before/after paragraphs) don't always translate cleanly to EPUB's CSS-based formatting. Some readers ignore those settings entirely.
How to fix it:
- In your Word manuscript, use consistent paragraph spacing. Set "Spacing After" to 0 pt for body text, and use a single blank paragraph between sections if you need visual separation.
- Avoid using multiple hard returns (Enter key presses) to create space. One blank paragraph is enough.
- Use styles (Heading 1, Body Text, etc.) rather than manual formatting. Styles convert more reliably to EPUB.
- After conversion, if spacing is still off, check your EPUB's CSS file. Most EPUB readers allow you to inspect the underlying code—look for `margin` and `padding` values and adjust them to match.
2. Broken or Missing Images
Images that looked perfect in Word sometimes fail to appear in your EPUB, or appear scrambled and tiny.
Why it happens: Word stores images differently than EPUB does. If an image is embedded as a linked object or stored in a way that EPUB readers don't support, it gets dropped. Also, oversized images can cause rendering problems on small screens.
How to fix it:
- Before conversion, ensure all images are inserted as actual image files (not linked). Use Insert > Pictures > This Device, not Insert > Online Pictures.
- Save images in JPG or PNG format. EPUB supports both; other formats may not.
- Keep image dimensions reasonable. For body-text illustrations, 600 px wide is usually safe. For full-page images (like cover art or chapter openers), 1000–1200 px is fine.
- Compress images before inserting them. Large file sizes slow down EPUB rendering and bloat your file.
- If an image is still missing after conversion, you can manually add it back by editing the EPUB's XML. Most EPUB editors (like Sigil, a free tool) make this straightforward.
3. Mangled Tables and Lists
Tables and bulleted lists are notorious troublemakers in EPUB conversion. Cells might collapse, bullets might vanish, or text might overflow.
Why it happens: EPUB's table support is basic compared to Word's. Complex merged cells, nested tables, and heavily styled lists don't always survive the conversion process.
How to fix it:
- Keep tables simple. Avoid merged cells, nested tables, and background colors. Stick to straightforward rows and columns.
- For bulleted lists, use Word's built-in bullet formatting (Home > Bullets), not manual dashes or asterisks.
- If a table is too complex for EPUB, consider converting it to text or a simplified list format before conversion.
- After conversion, test your EPUB on multiple devices (Kindle, Apple Books, Kobo, etc.). Tables render differently on each platform, so you might need to simplify further or provide a text alternative.
4. Broken Hyperlinks and Cross-References
Links that work in Word sometimes point to the wrong location in your EPUB, or don't work at all.
Why it happens: Word's internal cross-references use a different linking mechanism than EPUB. When converted, these references might break if the target section's ID changes or if the link syntax isn't EPUB-compliant.
How to fix it:
- Use Word's built-in hyperlink feature (Insert > Link) for external URLs. These convert more reliably than manual text.
- For internal cross-references (e.g., "See Chapter 5"), use Word's cross-reference tool (Insert > Cross-reference), but test them thoroughly after conversion.
- After conversion, manually verify all links in your EPUB reader. If a link is broken, you can fix it by editing the EPUB's HTML files or using an EPUB editor.
- For ebooks that will be distributed across multiple platforms, keep links simple and test on each platform (Kindle, Apple Books, etc.).
5. Font and Text Styling Issues
Sometimes italics become regular text, bold disappears, or custom fonts render as fallback fonts. This is especially common if you used uncommon fonts or heavy styling in Word.
Why it happens: EPUB readers have limited font support. They prioritize system fonts (like Georgia, Arial, and Times New Roman) and may ignore custom fonts or unusual styling combinations.
How to fix it:
- Stick to common fonts in Word: Georgia, Times New Roman, Calibri, or Arial. Avoid decorative or script fonts.
- Use bold and italic sparingly, and always apply them via Word's formatting buttons (not manual styling or all-caps tricks).
- If you need a custom font for a specific design element (like a chapter title), embed it in the EPUB. Most EPUB editors allow you to add custom fonts, though not all readers will display them.
- After conversion, accept that readers may override your font choices. Focus on making sure your text is readable and your emphasis (bold, italic) is clear.
6. Special Characters and Encoding Problems
Curly quotes, dashes, accented letters, and other special characters sometimes appear as garbled symbols in your EPUB.
Why it happens: If your Word document uses an older character encoding (like Windows-1252) instead of UTF-8, the conversion process may misinterpret special characters.
How to fix it:
- In Word, use the correct special characters: Insert > Special Character. Use curly quotes (“ ”), em dashes (—), and accented letters directly, not keyboard shortcuts or workarounds.
- Before conversion, save your Word file as .DOCX (not .DOC). The newer format handles encoding better.
- If garbled characters appear after conversion, you can fix them by editing the EPUB's HTML files. Look for character entities (like `&` or `—`) and replace them with the correct UTF-8 characters.
Prevention: Best Practices Before Conversion
The easiest way to avoid EPUB formatting errors is to prepare your Word manuscript correctly from the start. Here's a quick checklist:
- Use styles: Apply Heading 1, Heading 2, Body Text, etc., instead of manual formatting.
- Keep it simple: Avoid complex tables, nested lists, and decorative elements.
- Use standard fonts: Georgia, Times New Roman, or Calibri.
- Test images: Ensure they're embedded (not linked) and saved as JPG or PNG.
- Clean up spacing: Use paragraph styles for spacing, not multiple hard returns.
- Check links: Verify that all hyperlinks and cross-references work correctly.
- Save as .DOCX: Use the modern Word format, not the older .DOC.
Tools for Fixing EPUB Errors After Conversion
If formatting issues slip through, you have several options for fixing them:
EPUB Editors: Free tools like Sigil let you edit the underlying HTML and CSS directly. This is powerful but requires some technical knowledge.
Online validators: Services like the IDPF EPUB Validator check for structural errors and give you a detailed report of what's wrong.
Expert review: If you're using a conversion tool like ebookconvert.pro, you can flag formatting issues for the production team to review. This is faster than learning to edit EPUB files yourself, especially if you're on a tight deadline.
Testing Your EPUB Across Devices
Before you publish, test your EPUB on at least three different readers:
- Kindle (Amazon): Download the free Kindle app for your phone or computer.
- Apple Books: If you have an iPhone or iPad, use the built-in Books app.
- Kobo or Google Play Books: These readers often display formatting differently than Kindle or Apple Books.
Pay attention to spacing, image placement, table layout, and link functionality on each platform. If something looks off on one device but fine on others, it's usually a reader-specific quirk—not a critical error.
Common Mistakes to Avoid
As you troubleshoot, watch out for these pitfalls:
- Editing the EPUB in Word: Don't try to open an EPUB file in Word and re-save it. This will corrupt the file. Use an EPUB editor instead.
- Over-styling: Resist the urge to add custom fonts, colors, and backgrounds. EPUB readers often ignore them, and they bloat your file size.
- Ignoring reader limitations: EPUB readers are not Word. They have limited CSS support and may override your formatting. Design for readability, not pixel-perfect control.
- Skipping the test phase: Always download and test your EPUB on at least one device before publishing. Many errors only show up on actual readers, not in conversion previews.
Wrapping Up
Converting Word to EPUB is usually smooth, but formatting errors can happen. The key is understanding why they occur and knowing how to prevent or fix them. Start with a clean, well-formatted Word manuscript using styles and simple formatting. Test your EPUB on multiple devices before publishing. And if you run into stubborn issues, don't hesitate to use an EPUB editor or ask for professional help.
Most EPUB formatting errors are fixable—it just takes patience and the right approach. With these tips in your toolkit, you'll be able to spot problems early and resolve them before your ebook reaches readers.
