How should I decide between EPUB and PDF?

Start with compatibility constraints, then compare compression, tooling support, and operational complexity.

Where can I test both formats directly?

Use the linked sample pages and format hubs for each side of this comparison.

Compare reflowable EPUB reading with fixed-layout PDF distribution.

Category: Ebook

Best for: Mobile/reader-first digital books with adaptable layout.

Files4

Min Size5.0 KB

Max Size8.3 KB

MIME:

application/epub+zip

Open Samples Open Hub

Category: Document

Best for: Stable print-style layout and enterprise document exchange.

Files7

Min Size43.2 KB

Max Size51200.0 KB

MIME:

application/pdf

Open Samples Open Hub

Prioritize compatibility requirements first, then compare payload size, parser/toolchain support, and conversion cost.

Use both sample pages and hub manifests to validate your chosen format under production-like file sizes.