HTMLZ to MOBI converter
Turn HTMLZ into MOBI
Send us the HTMLZ you already have and take away a MOBI. Handled on our servers, deleted the moment the job ends.
or drag and drop files here
HTMLZ files • Max 50MB per file • Up to 10 files
Both formats, briefly
HTMLZIN
HTMLZ is a book packed as ordinary web files: the HTML holding the text, a stylesheet, and the images, zipped together into one archive. Nothing sits behind a proprietary container, so this is the format to pick when you want to edit a book by hand, feed it to your own publishing script, or inspect how the markup came out of an earlier conversion. Calibre reads and writes it, which makes it a comfortable stopping point between two other formats. Choose HTMLZ when the file is a working copy rather than the version someone will read.
MOBIOUT
MOBI is the format Amazon built its early Kindle library on, after buying it from Mobipocket. Books in it keep bookmarks, highlights and your place in the text, and Kindle hardware from that era reads them directly. Newer Kindles moved on to AZW3, so MOBI now matters mainly when an older device or a reading app of the same vintage is still in service. If you inherited a shelf of .mobi files, converting them to EPUB or AZW3 keeps those books readable on current hardware.
Three steps, start to finish
Add your HTMLZ
Drag it onto the page, or pull it in from your computer, Google Drive or Dropbox.
MOBI is preselected
This page is already set to write MOBI. Switch the target if you change your mind.
Take the MOBI
Grab the result the moment the job clears. Your upload is wiped straight afterwards.