How do I convert a MOBI file to PDF for free?

Drop the .mobi file into the converter above and click Convert. Morphix reads the Palm database records, decompresses the PalmDOC text, and writes a paginated PDF you can download immediately — free, with no signup or watermark.

Does this work with Kindle MOBI files?

It works with any DRM-free MOBI or PRC file, including Kindle files you produced yourself and sideloaded documents. Titles purchased from the Kindle Store carry DRM and cannot be converted here.

Is my MOBI file uploaded to a server?

No. The whole conversion happens in your browser tab. There is no upload request, no queue and no temporary copy on a server, which you can verify in the Network tab of developer tools.

Why does my MOBI fail with a compression error?

A small number of older MOBI files use HUFF/CDIC compression, which browsers cannot unpack efficiently. Re-export the book as EPUB in your ebook manager and use the EPUB to PDF tool instead.

MOBI to PDF Converter — Free & Private

Why convert MOBI to PDF?

MOBI is Amazon's legacy Kindle format, and Amazon stopped accepting it for new sideloads in 2022. Anything outside a Kindle app struggles to open it. PDF is the universal fallback: it opens on every phone, laptop and print shop, and it keeps a fixed layout you can annotate or hand to someone else.

How the conversion works

A MOBI file is a Palm database: a header, a record index, then compressed text records. Morphix reads the index, decompresses the PalmDOC LZ77 stream, parses the resulting markup into chapters, and lays them out on A4 pages with jsPDF — all locally, with no upload.

DRM and limits

Encrypted store purchases are detected and refused — Morphix does not remove DRM. Images and Kindle-specific styling are dropped in favour of a clean text edition, which keeps the PDF small and searchable.