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WorkinTool FREE EPUB to MOBI Converter Online

Convert EPUB to MOBI in batches effortlessly and instantly with WorkinTool's FREE EPUB to MOBI converter online. PDF-to-MOBI conversion is also supported.
Up to four files within a total size of 2MB.
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How to Convert EPUB to MOBI Free Online

Step 1
Click + to upload your EPUB file(s).
Step 2
Press the Convert tab. (Add more files if you want to.)
Step 3
Hit Download to get your converted file(s).

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What is EPUB?

EPUB, short for Electronic Publication, is a universal eBook file format with the extension of .epub. It can store words, images, stylesheets, fonts, metadata details, and tables of content, so it is reflowable and resizable. Since it is the standard ebook publishing format, it is compatible with many devices like computers, e-readers, smartphones and tablets.

What is MOBI?

MOBI is a Mobipocket eBook file that uses the extension of .mobi or .prc. It is released by Amazon to store digital books and is lightweight in size. It supports bookmarks, notes, corrections, and JavaScript. Much as Amazon discontinued its development in 2021, its descendants (AZW3, KF8, and KFX) are all presented based on it.


Features EPUB MOBI
Size Larger Lighweight
Publisher All publishers worldwide Amazon
Compatibility Nearly All Devices (Computers, e-Readers, Smartphones and Tablets) Calibre and Amazon Kindle
Still Used? Yes No (upgraded to AZW3, KF8, and KFX)

WorkinTool EPUB to MOBI Converter Online Features

Conversion Without Any Limitations
Conversion Without Any Limitations
WorkinTool free online EPUB converter can help you with your EPUB-to-MOBI conversion anywhere and anytime you have internet access. It is also available on all devices, including Windows laptops, Macbooks, iPhones and Android smartphones.
Enjoy Outcomes in Batches
Enjoy Outcomes in Batches
Four MOBI files converted from EPUB can be expected simultaneously through WorkinTool free EPUB to MOBI converter online. Therefore, you save the cumbersome process of converting your .epub files one by one.
100% Secure
100% Secure
All your uploaded ebooks will be removed automatically within 24 hours, so your data privacy and information security are both guaranteed. Meanwhile, WorkinTool free online EPUB to MOBI converter is virus-free.
Entirely FREE of Charge
Entirely FREE of Charge
WorkinTool online EPUB to MOBI converter is 100% FREE for users. A license payment and compulsory email registration are not required to enjoy all its features.
Output Without Losing Quality
Output Without Losing Quality
WorkinTool free online EPUB to MOBI converter will change your EPUB files to high-quality MOBI ebooks without losing formatting.
Easy to Use
Easy to Use
Only three steps are needed to turn your .epub ebooks into .mobi files online for free.
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