Documents conversion
Convert HTML to MOBI
Updated Jul 2026
HTML is the format a web page is written in, and MOBI is the ebook format older Kindles read. To convert HTML to MOBI, open the file in a converter and export it as MOBI, which repaginates the text so it reads like a book instead of a web page. Doing this on your own computer means the page's content never has to be uploaded anywhere.
- Extension
- .html
- Type
- Documents
- Typically
- Web pages
- Extension
- .mobi
- Type
- Ebooks
- Typically
- Older Kindles
Convert HTML to MOBI on your own computer. Nothing uploads.
How to convert HTML to MOBI
- Open Morphjet and drag in the HTML file, or a whole folder of saved pages, you want turned into an ebook.
- Choose MOBI as the output format.
- Convert. The MOBI file is written right next to your original, and nothing leaves your machine.
HTML vs MOBI: what actually changes
| HTML | MOBI | |
|---|---|---|
| Opens everywhere | Yes, any web browser | No, mainly older Kindles and Kindle apps |
| File size | Small text, but images and styling can add up | Similar, packaged into one file |
| Reading on an e-reader | Not designed for it, no pagination or font resizing | Built for it, reflows text and lets you adjust font size |
| Quality | Exact as written | Text and images preserved, but layout reflows to fit the page |
| Ebook metadata (title, author, cover) | No structured fields for this | Yes, MOBI has dedicated fields |
| Interactive elements (scripts, forms) | Yes, if the page uses them | No, e-readers don't run them |
When to convert, and when not to
Convert HTML to MOBI when you've saved an article, a set of documentation pages, or web-based writing and want to read it on an older Kindle instead of a screen and browser.
Keep the HTML if the page relies on interactive elements, video, or precise layout, since MOBI strips those out and reflows everything as plain reading text.
Why not just use an online converter?
Saved web pages often contain things you'd rather not hand to a stranger's server, personal reading lists, work documentation, or articles you meant to read later. An online converter means uploading that content to convert it. Doing it on your own computer keeps the page, and whatever it's about, on your machine the whole time.
Questions
Does converting HTML to MOBI lose any formatting?
Text and images carry over, but MOBI reflows the layout to fit an e-reader page, so things like multi-column layouts, fixed positioning, or custom fonts won't look the same as they did in a browser.
Will links in the HTML still work in the MOBI file?
Internal links between pages usually work. Links out to the web are kept as text, but following them depends on whether your Kindle has a browser or internet connection.
Is MOBI still supported by current Kindles?
Newer Kindles have moved to other formats, but they still open MOBI files and older Kindle devices rely on it as their native format. It remains a safe choice for e-reader compatibility.
Can I convert a whole folder of HTML pages into one MOBI book?
Yes. Morphjet can take a folder of HTML files and convert them together, which is useful for turning a multi-page article or a set of documentation into a single ebook.
Can I convert HTML to MOBI without uploading the file anywhere?
Yes. A desktop app like Morphjet converts the file on your own computer, so the page's content never travels over the internet. You could do it with your wifi off.
Morphjet converts HTML, MOBI, and 1,800+ other formats, all on your machine. Launching this July.