Convert PDF to MOBI — Free Online Converter
Convert Portable Document Format (.pdf) to Mobipocket eBook (.mobi) online for free. Fast, secure document conversion with no watermarks or registration.
Conversion settings — add a file to adjust
About PDF to MOBI Conversion
MOBI is the proprietary ebook format used by Amazon Kindle devices and apps. Converting PDF to MOBI makes document content readable on Kindle e-readers with reflowable text that adapts to different screen sizes and allows users to adjust font size, line spacing, and margins — features that fixed-layout PDFs cannot provide on a 6-inch Kindle screen.
The conversion extracts text and images from the PDF, restructures the content into a reflowable ebook layout, and packages it in the MOBI format that Kindle devices recognize natively. This is fundamentally different from simply viewing a PDF on a Kindle — MOBI text reflows to fit the screen, supports Kindle features like bookmarks, highlights, and dictionary lookup, and provides a proper reading experience rather than forcing users to constantly zoom and pan on a small screen.
Why Convert PDF to MOBI?
PDFs on Kindle are a poor reading experience. The fixed-layout nature of PDF means text appears tiny on a 6-inch e-reader screen, requiring constant zooming and horizontal scrolling. MOBI's reflowable format solves this completely — text wraps to the screen width, users control font size, and the Kindle's page-turn buttons work naturally.
MOBI is also the format for sideloading personal documents to Kindle via email (Send to Kindle) and USB transfer. While Amazon also supports AZW3, MOBI is the legacy format that works on every Kindle device ever made, from the original 2007 Kindle to the latest Paperwhite and Oasis models.