XLSX vs EPUB
How do XLSX and EPUBcompare? Here's everything you need to know to choose the right format — and how to convert between them.
.xlsx
Full guide →Office Open XML Spreadsheet
XLSX is the default format for Microsoft Excel spreadsheets. It supports complex formulas, charts, pivot tables, and large datasets. It's the industry standard for data analysis and financial modeling.
.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 | XLSX | EPUB |
|---|---|---|
| Full name | Office Open XML Spreadsheet | Electronic Publication |
| Extension | .xlsx | .epub |
| MIME type | application/vnd.openxmlformats-officedocument.spreadsheetml.sheet | application/epub+zip |
| Category | Document | Document |
| Developer | Microsoft | International Digital Publishing Forum (IDPF) |
| Year introduced | 2007 | 2007 |
XLSX advantages
- Powerful formula and calculation engine
- Supports charts, pivot tables, and macros
- Industry standard for business data
- Compatible with Google Sheets and LibreOffice
XLSX limitations
- Complex format for simple data
- Can be slow with very large datasets
- Formatting issues between applications
- Requires office software for full features
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?
XLSX and EPUB serve different purposes. XLSX is ideal for financial reports and budgets, while EPUB excels at e-books and digital publications.
Best uses for XLSX
Best uses for EPUB
Convert between XLSX and EPUB
Need to switch formats? Convert for free with SquishConvert.