Published list
Thirteen types on the Windows page. MOBI is not one of them.
| Type | Note from the help pages |
|---|---|
| Included for an adjustable layout. Print-format PDFs can be written on directly on Kindle Scribe. USB-loaded PDFs do not take handwriting. | |
| DOC / DOCX | Ink drawings can fail conversion. In Word, comments become Kindle footnotes for “Like a Kindle book” and hide for “Like a printed document.” |
| TXT / RTF | TXT is treated like other adjustable-layout documents. RTF is on both the Windows page and the help list. |
| HTM / HTML | Both appear on the Windows page. The help page writes them as .HTML and .HTM. |
| PNG GIF JPG JPEG BMP | Listed as personal-document images. JPG and JPEG are one image family on the help page. |
| EPUB | On the Windows page. Handwriting is not supported in EPUB comics, manga, and children books. |
The 1.1.1.260 installer still registers AZW, MOBI, PRC, and PSZ. A registered extension is not the same as a format the Windows page tells you to send. EPUB, HTM, and HTML are on the page and are absent from that installer list.