HTML vs EPUB
How do HTML and EPUBcompare? Here's everything you need to know to choose the right format — and how to convert between them.
.html
Full guide →HyperText Markup Language
HTML is the standard markup language for creating web pages. While primarily a web technology, HTML files are also used as a portable document format with rich formatting and multimedia support.
.epub
Full guide →Electronic Publication
EPUB is the open standard for digital books and publications. It supports reflowable content that adapts to any screen size, making it the preferred format for e-readers and reading apps.
| Specification | HTML | EPUB |
|---|---|---|
| Full name | HyperText Markup Language | Electronic Publication |
| Extension | .html | .epub |
| MIME type | text/html | application/epub+zip |
| Category | Document | Document |
| Developer | W3C / WHATWG | International Digital Publishing Forum (IDPF) |
| Year introduced | 1993 | 2007 |
HTML advantages
- Viewable in any web browser
- Rich formatting and multimedia
- Accessible and searchable text
- Can include interactive elements
HTML limitations
- Not a fixed-layout format
- Rendering varies between browsers
- External resources may break links
- Not ideal for print or signing
EPUB advantages
- Reflowable text — adapts to any screen
- Open standard with wide support
- Supports rich formatting and images
- Accessible with screen readers
EPUB limitations
- Not supported by Amazon Kindle natively
- Complex internal structure
- Formatting can be inconsistent
- Less control over layout than PDF
Which should you use?
HTML and EPUB serve different purposes. HTML is ideal for web pages and email newsletters, while EPUB excels at e-books and digital publications.
Best uses for HTML
Best uses for EPUB
Convert between HTML and EPUB
Need to switch formats? Convert for free with SquishConvert.