Convert PUB to EPUB — Free Online Converter
Convert Microsoft Publisher (.pub) to Electronic Publication (.epub) online for free. Fast, secure document conversion with no watermarks or registrat...
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How to Convert
Upload your .pub file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .epub file when it's ready.
About PUB to EPUB Conversion
PUB to EPUB conversion transforms Microsoft Publisher documents into the open ebook standard used by Apple Books, Kobo, Google Play Books, and most non-Amazon e-readers. EPUB packages reflowable content with semantic HTML, CSS styling, and embedded resources into a standardized ZIP archive that adapts to any screen size — from phone displays to large tablets.
Our converter processes the PUB file through LibreOffice's import filters, extracts the content, restructures it for reflowable display, and generates EPUB output with proper metadata, chapter navigation, and embedded images. The result works on any EPUB-compatible device or reading application.
Why Convert PUB to EPUB?
Publisher documents designed for print (brochures, newsletters, catalogs) can reach entirely new audiences as ebooks. EPUB's reflowable text adapts to every screen size, making content readable on phones, tablets, and e-readers without horizontal scrolling or zooming. For organizations publishing periodic content, EPUB extends distribution beyond print.
EPUB is also the standard submission format for most ebook stores and digital libraries. Converting PUB to EPUB enables publishing through Apple Books, Google Play Books, Kobo, and library lending platforms without recreating the content from scratch.
Common Use Cases
- Publishing newsletters and brochures as ebooks for Apple Books, Kobo, and Google Play Books
- Creating reflowable ebook versions of Publisher catalogs for mobile device reading
- Distributing Publisher-designed educational materials through ebook platforms and digital libraries
- Converting Publisher newsletters into EPUB for email distribution to subscribers with e-readers
- Making print-oriented Publisher designs accessible as reflowable digital publications
How It Works
EPUB 3 is a ZIP archive containing XHTML content, CSS stylesheets, images, fonts, and metadata in a standardized directory structure. The OPF manifest describes all resources, the NCX/nav provides table of contents, and the content flows as semantic XHTML5. Our conversion extracts Publisher content through LibreOffice, restructures fixed-layout elements into reflowable HTML, and packages everything per the EPUB 3.2 specification.
Quality & Performance
Text content and basic formatting convert well. Publisher's complex multi-column layouts are restructured into single-column reflowable text optimized for ebook readers. Images are embedded at appropriate resolution for e-reader displays. Complex Publisher design elements (text wrapping around images, decorative borders, background patterns) are simplified for the reflowable format.
Device Compatibility
| Device | PUB | EPUB |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No | No |
Tips for Best Results
- 1Review the EPUB on multiple devices (phone, tablet, e-reader) to verify text reflow and image placement
- 2Edit metadata (title, author, description) in Calibre's editor before publishing to ebook stores
- 3Add a cover image if the Publisher document doesn't have one — ebook stores require cover images
- 4For complex Publisher layouts, expect significant restructuring — EPUB is designed for reading, not layout preservation
- 5Validate the EPUB using EPUBCheck before submitting to ebook stores to ensure standards compliance
PUB to EPUB opens Publisher content to the ebook ecosystem. The conversion transforms print-oriented designs into reflowable ebooks accessible on every major reading platform.