PUBLISHING
DOCX vs EPUB: which format do authors need?
The difference between DOCX, EPUB and PDF manuscript files, which one to use for editing, ebooks and print, and how to avoid common conversion problems.
Authors meet three file formats again and again: DOCX, EPUB and PDF. Each has a different job. Using the right one at each stage avoids formatting problems, rejected uploads and frustrated editors.
The short answer
| Format | Best for | Not ideal for |
|---|---|---|
| DOCX | Writing, editing, sending to editors, some store uploads | Final ebook display |
| EPUB | Ebooks on phones, tablets and e-readers | Editing or print |
| Print interiors and fixed-layout review copies | Ebooks on small screens |
Most self-published authors need all three at different stages.
DOCX: the working format
DOCX is the Microsoft Word format, also opened by Google Docs, LibreOffice and Pages.
Use it for:
- Editing with tracked changes and comments.
- Sending your manuscript to editors and proofreaders, who usually expect Word files.
- Uploading to stores that accept Word documents and convert them into ebooks.
Watch out for: hidden formatting. Manual spacing, inconsistent styles and pasted text from other sources can cause odd results when a store converts the file. Keep styles clean and consistent.
EPUB: the ebook format
EPUB is the open standard for reflowable ebooks. The text adapts to the reader's screen and settings.
Use it for:
- Uploading ebooks to stores that accept EPUB.
- Checking how your ebook will look on real devices.
- Sending advance reader copies to readers who use e-readers.
Watch out for: layouts that depend on fixed pages. In an EPUB, readers control font and size, so manual page breaks, text boxes and exact positioning do not work as they do in print. Keep the structure simple: headings, paragraphs, scene breaks and a table of contents.
PDF: the fixed-layout format
PDF preserves exactly how each page looks.
Use it for:
- Print interiors for paperback and hardback books, set at your trim size.
- Review copies where the layout must look exactly as designed.
Watch out for: using PDF as an ebook. On a phone, a PDF page is tiny and the text does not reflow, which is uncomfortable to read.
Which format each step needs
- Writing and editing: DOCX (or your writing software, exporting DOCX for editors).
- Ebook: EPUB (or DOCX, if the store converts it).
- Paperback: a PDF interior at the correct trim size, plus a separate cover file.
- Proofreading: the final format readers will see, so you catch formatting errors as well as typos.
Common conversion problems
- Missing table of contents: chapters were formatted as bold text instead of headings.
- Strange gaps: empty lines used for spacing.
- Odd indents: tabs or spaces instead of paragraph settings.
- Inconsistent quotes: a mix of straight and curly quotation marks.
- Lost scene breaks: extra blank lines disappear; use a visible marker such as
***.
Generating every format from one clean, structured source avoids most of these.
How Gold Prints helps
Gold Prints Publishing Studio keeps your manuscript in structured chapters and exports it as DOCX, PDF, EPUB or plain text from one source, using the trim size, layout, font and line spacing you choose in the Formatting Studio. That means your editor's file, your ebook and your print PDF all come from the same final text.