MOBI to HTML Converter
Processing entirely on your device — large files may take a moment.
Kindle eBook and HTML Document exist for different jobs: MOBI is Amazon Kindle’s legacy e-book format (also AZW/AZW3). It predates EPUB adoption and still circulates in older book collections. HTML keeps headings, links and tables intact and ready to publish on the web or convert onwards to other document formats.
This converter runs entirely in your browser using WebAssembly — your files never leave your device, nothing is uploaded, and there are no watermarks, sign-ups or queues. Drop in several files at once to convert them as a batch.
How MOBI compares to HTML
| MOBI | HTML | |
|---|---|---|
| Layout | Reflowable, dated engine | Flowing, CSS-controlled |
| Editability | Limited tooling | Plain-text editable |
| Best for | Legacy Kindle devices | Web pages and shareable documents |
How to convert MOBI to HTML
- 1
Select your files
Drag & drop your MOBI files onto the area above, or click to browse. You can add multiple files at once for batch conversion.
- 2
Convert instantly
Click "Convert to HTML". The conversion runs entirely inside your browser using WebAssembly — no upload, no queue, no waiting.
- 3
Download results
Download each converted HTML file individually, or grab everything at once as a ZIP archive.
About the MOBI format
MOBI is the Mobipocket format Amazon adopted for the original Kindle (2007), later extended as KF8/AZW3. It reflows text like EPUB but with a fraction of the formatting capability — basic styles, images, bookmarks — and its metadata model is decades old. Amazon stopped accepting MOBI uploads for reflowable ebooks in 2022 in favor of EPUB.
Its remaining role is old hardware: early Kindle models and some e-readers that never learned EPUB. Note that DRM-protected Kindle books (AZW/KFX with encryption) are a separate, legally distinct matter from converting MOBI files you created or that are DRM-free.
+ Strengths
- ✓Supported by legacy Kindle hardware
- ✓Compact and self-contained
! Limitations
- −Deprecated by Amazon since 2022
- −Weak formatting compared to EPUB3
- −Modern Kindle models prefer EPUB/AZW3
About the HTML format
HTML is the markup language of the web itself. A document is plain text decorated with tags that describe structure — headings, paragraphs, lists, links, tables, images — and browsers turn that structure into a rendered, styled page. It is both a format and a program target: CSS styles it and JavaScript makes it interactive.
As a document format, HTML's strength is universality: any device with a browser displays it, text stays selectable and searchable, and links make it navigable. Its weakness is that rendering depends on the surrounding CSS and viewport, so it is a flowing document, not a fixed-layout one — printing or archiving an HTML page is inherently an approximation.
+ Strengths
- ✓Displays on every device with a browser
- ✓Semantic structure: headings, links, tables, media
- ✓Text remains selectable, searchable and accessible
! Limitations
- −Final look depends on CSS and viewport
- −Not a fixed-layout or print format
- −Untrusted HTML must be sanitized before display
Why convert MOBI to HTML?
There is a concrete reason this conversion exists: Deprecated by Amazon since 2022 HTML sidesteps that — Displays on every device with a browser If that is your situation, the tool above settles it in seconds, entirely on your device.
Frequently asked questions
Is this MOBI to HTML converter really free?
Yes — completely free, with no sign-up, no watermark and no daily conversion limits. The site is supported by advertising.
Are my files uploaded to a server?
No. The conversion runs entirely inside your browser using WebAssembly, so your files never leave your device — that is what makes it instant and private.
Does it work on Windows, Mac, iPhone and Android?
Yes. Anything with a modern browser works: Windows, macOS, Linux, Android and iOS. No software installation is required.
Is there a file size limit for MOBI to HTML?
The only limit is your device's memory, since nothing is uploaded. Files up to a few hundred megabytes work fine on a modern desktop browser; very large files simply take a little longer.
Will chapters and the table of contents survive?
Chapter structure and internal links are carried over wherever HTML has a place for them. The converter follows the book's own structure rather than flattening it into one stream.
What about images and covers?
Embedded images and the cover are extracted and re-embedded in the output where the format supports them. Heavily designed layouts may simplify, but the pictures themselves come through.