How to convert MOBI to HTMLZ
- 1
Upload your file
Drag and drop a file or click to select one. Keep this page open while the file uploads and converts.
- 2
Convert MOBI to HTMLZ
NexMedia converts MOBI to HTMLZ on its own servers. Processing time depends on the file size and how busy the queue is.
- 3
Download the converted file
When the conversion finishes, the download appears on this page. Your converted file is kept for 2 hours, then deleted.
About MOBI
MOBI is the Mobipocket ebook format, which Amazon acquired in 2005 and used for the first Kindles.
Older Kindle devices and ebook collections from before AZW3.
MOBI supports only basic formatting, and Amazon's Send to Kindle no longer accepts MOBI files.
Convert MOBI to HTMLZ online free, no account required — HTMLZ is a book as one HTML page, packed in a ZIP.
Change MOBI to HTMLZ without losing quality — convert MOBI to HTMLZ free in your browser.
Why won't Amazon accept my MOBI file for the Kindle anymore? Amazon retired the old MOBI format for personal documents, and modern Kindles expect EPUB or AZW3 instead — converting keeps the book readable.
About HTMLZ
HTMLZ is Calibre's format for a book as a single HTML page with its CSS and images, packed in a ZIP file.
Editing the text of a book in an HTML editor, or publishing it as a web page.
Few readers open HTMLZ directly; it is mainly an exchange format for Calibre.
Why convert an ebook to HTMLZ? As a compact archive copy that any browser can open once unzipped, preserving structure without a reader app.
What changes when you convert MOBI to HTMLZ
- Ebook conversion is best-effort: the text, images and table of contents of the MOBI carry over to HTMLZ, but layout and styling can change.
- Fixed layouts, embedded fonts and complex styling in the MOBI may not survive the move to HTMLZ.
- MOBI files can carry DRM copy protection; protected files are detected and refused, because copy protection is never removed.
Settings you can change
Before you convert MOBI to HTMLZ, you can adjust: Title, Author, Language, Page size, Base font size, and Generate table of contents.
Limits
Each plan sets a maximum file size and a number of conversions per day, and video and audio files also have a maximum length. Guests can convert files up to 100 megabytes and 5 per day; a free account raises this to 500 megabytes and 25 per day; paid plans go up to 100 gigabytes.
Your converted HTMLZ file is kept for 2 hours, then deleted.
MOBI to HTMLZ: questions and answers
Does converting MOBI to HTMLZ reduce quality?
Ebook conversion is best-effort: the text, images and table of contents of the MOBI carry over to HTMLZ, but layout and styling can change.
What is the difference between MOBI and HTMLZ?
MOBI is the Mobipocket ebook format of early Kindles. HTMLZ is a book as one HTML page, packed in a ZIP.
Can I change the settings when converting MOBI to HTMLZ?
Before you convert MOBI to HTMLZ, you can adjust: Title, Author, Language, Page size, Base font size, and Generate table of contents.
Do I need an account to convert MOBI to HTMLZ?
No. You can convert MOBI to HTMLZ without an account; signing in raises the file-size and daily limits.
How long is my converted HTMLZ file kept?
The HTMLZ file you convert from MOBI is kept for 2 hours, then deleted automatically.
Will the page layout of my MOBI survive in the HTMLZ?
Fixed layouts, embedded fonts and complex styling in the MOBI may not survive the move to HTMLZ.
What happens if my MOBI file is copy-protected?
MOBI files can carry DRM copy protection; protected files are detected and refused, because copy protection is never removed.