BookbndrIn plain terms: an EPUB is the standard file type for e-books — one file that holds your whole book and works on almost every e-reader, phone and tablet.
When you finish your book in Bookbndr, it produces a single .epub file. You can upload that one file to Amazon Kindle, Apple Books, Kobo, Google Play Books and most other stores, or send it straight to a reader's device.
EPUB vs a print PDF
Bookbndr can produce two different things, for two different purposes:
- EPUB — for digital reading. The text reflows: when a reader changes the font size, rotates their phone, or uses a small e-reader, the words rearrange to fit. There are no fixed "pages".
- Print PDF — for paper. Every page is a fixed size (its trim size) with fixed margins, because it's going to a printer. Nothing reflows.
Most authors start with the EPUB. If you also plan to sell a paperback, you can produce the print file from the same project later.
Why an EPUB isn't just "a document"
Because the text reflows, you don't control exact page breaks the way you would in Word. Instead you control style — fonts, spacing, chapter openers, scene breaks — and the reader's device decides where pages fall. That's normal and expected for e-books.
→ Ready to make one? See Generate & download your EPUB.