EPUB vs PDF
| Feature | EPUB | |
|---|---|---|
| Layout | Fluid (reflowable) | Fixed pages |
| Printing | Not ideal | Perfect |
| E-reader support | Native | Limited |
| File size | Smaller | Larger |
EPUB adapts to screen size. PDF locks layout — ideal for print or sharing with exact formatting.
When to Convert EPUB to PDF
- Printing a book on paper
- Sharing with someone without an e-reader or reading app
- Submitting to print-on-demand services
- Archiving with a fixed visual layout
Method 1: Calibre (Free, Recommended)
- Install Calibre from calibre-ebook.com
- Add EPUB to library
- Right-click > Convert Books > Convert Individually
- Output format: PDF
- Set paper size and margins under Page Setup
- Click OK
Calibration tips:
- Increase base font size under Look & Feel if text is too small
- Enable Remove Float Images if images are misplaced
Method 2: Pandoc
# With LaTeX (best output)
pandoc book.epub -o book.pdf -V geometry:a4paper -V geometry:margin=2cm
# Without LaTeX
pandoc book.epub -o book.pdf --pdf-engine=wkhtmltopdf
Method 3: Online
KaijuConverter handles EPUB to PDF without any installation.
Common Issues
Text too small → Increase base font size in Calibre
Images misplaced → Enable Remove Float Images in Calibre
DRM-protected EPUB → DRM-protected files from Amazon/Kobo cannot be converted. Only DRM-free EPUBs work.
Print-Ready Settings
- Paper: A4 (Europe) or Letter (US)
- Margins: 2-2.5 cm; larger inner margin for bound books
- Font: Serif at 11-12pt (Georgia, Garamond, Times New Roman)
Advanced Use Cases
Legal and business workflow: signed contracts are distributed in PDF/A (PDF Archival) which guarantees the document renders identically in 50 years — all fonts embedded, no JavaScript, no dynamic content. Electronic signature (PAdES, advanced eSignatures) is integrated in PDF and validates cryptographically. Academic publishing: theses and papers use LaTeX → PDF for precise mathematical formulas; journals require specific format (Word with styles, LaTeX with journal class, or both). Converting between LaTeX, DOCX and PDF preserving semantic structure (citations, references, equations) requires specialized tools like Pandoc. E-books: Amazon KDP requires MOBI (legacy) or KFX (modern) format generated from EPUB; Apple Books accepts EPUB natively; Kobo, PocketBook and Nook prefer EPUB; Google Play Books accepts PDF and EPUB. Converting DOCX manuscript to EPUB requires attention to semantic markup (hierarchical headings, lists, blockquotes) so reflowable layout works well. Translation workflows: professional translators prefer XLIFF as intermediate format — maintains segmentation, translation memory matches, and context info that is lost in plain text export.
Best Practices and Professional Tips
Style preservation: when converting between editable formats (DOCX↔ODT↔RTF), always use defined styles instead of direct formatting — Heading 1/2/3 vs "16pt Bold". This guarantees outline preservation and conversion maintains hierarchical structure. Font embedding: for cross-platform distribution (PDF), embed all non-standard fonts — without embedding, readers automatically substitute with available fonts which can break layout. PDF/A for archival: for legal, regulatory or permanent archive documents, export as PDF/A-1b (basic) or PDF/A-2u (Unicode + JPEG2000) — doesn't allow dynamic content, guarantees self-contained rendering. Revision history: PDF, DOCX and ODT support tracked changes and comments — when converting, decide if you want to preserve them (DOCX→DOCX or DOCX→ODT) or flatten them (DOCX→PDF typically accepts only the final state). Accessibility: PDF documents for public distribution should comply with PDF/UA — heading structure, alt text on images, defined reading order for screen readers.
Compatibility and Technical Considerations
KaijuConverter uses LibreOffice 7.6 headless as the main engine with Pandoc 3.x as fallback for complex markup conversions. We support more than 60 document formats (PDF, DOCX, DOC, ODT, RTF, TXT, HTML, MD, EPUB, MOBI, AZW3, FB2, LaTeX, RST and more). Format fidelity: we preserve fonts (with substitution fallback if original font is not on system), sizes, colors, complete paragraphs with indentation and line spacing, nested lists, tables with cell merging and complex borders, embedded images with anchor positioning, headers/footers with dynamic fields (page number, date, document title), footnotes and endnotes. PDF conversion: we guarantee PDF/A-conforming output when required, with correct font embedding and ICC profile embedding for absolute color fidelity. Limitations: documents with macros (DOCX with VBA) don't execute macros during conversion — only static content is preserved. Scanned PDFs (image without OCR) are not editable — they need previous OCR (Tesseract, ABBYY) to extract text. Privacy: TLS 1.3, isolated Docker containers, deletion after 2 hours. Performance: typical 20-page document takes 3-8 seconds; large documents with many images may require 15-30 seconds.
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