How to Easily Convert Epub to Mobi


e-Book has become more and more popular nowadays. It is a portable electronic device, specially designed for reading books. You can easily buy and download digital books on the Internet. Compared with traditional books, consumers are more willing to buy e-Books because of the lower price and it is eco-friendly.

Epub and Mobi are both e-Book formats, but Epub does not support Kindle. If you are using the Kindle reader, you need to convert Epub to Mobi format. With the methods in this post, you can read the Epub e-Book in Kindle at ease.

Section 1 - Epub VS Mobi

What Is An Epub File?

The Epub file format is designed specifically for e-Books by the International Digital Publishing Forum (IDPF). It is a format of e-Book. EPUB files can store words, images, style sheets, fonts, metadata details, and tables of content. The best feature of the Epub format e-Book is its strong versatility. Currently, the Epub format is the e-Book format that supports the most e-reader.


Good compatibility for complex typography, diagrams, formulas, and other elements

Smaller volume


Not applicable to Kindle

What Is A Mobi File?

MOBI is the format used by the MobiPocket Reader and Amazon Kindle Readers. This e-Book format is based on XHTML and also allows for frames and JavaScript. The format supports DRM protection, images, and tables. It also allows for interactive actions such as adding notes, corrections, annotations, and bookmarking.


MOBI is usually in plain text format and the file size is small

MOBI is safe and DRM-locked


MOBI 7 format does not support rich typesetting formats in Kindle

Section 2 - Online Epub to Mobi Converter

1. Convertio

Convertio is an easy tool to convert files online. It supports more than 25,600 different conversion methods between more than 300 different file formats. Convertio supports all platforms. You don't need to download and install any software.

Step 1. Navigate to the Epub to Mobi tool in Convertio then select files from the computer, Google Drive, Dropbox, URL, or by dragging it on the page.

Convertio Epub to Mobi Upload

Step 2. Choose "Mobi" as your output format. You can hit "Add more files" to batch upload and convert files.

Step 3. Click the "Convert" button then let the file convert and you can download your Mobi file right afterward.

2. Online-Convert

Online-Convert is a free online file converter that allows you to convert media from one format to another easily and quickly. The e-Books converter supports a variety of input formats and you can also select the target e-Book reader device. The Mobi converter supports a lot of source formats like Epub to MOBI, AZW to MOBI, and more. Just try it and see if the online MOBI converter works for you.

Step 1. Go to the Online-Convert homepage and find the Ebook converter icon. Choose the "Convert to MOBI" to start the conversion.

Online-Convert Convert to Mobi

Step 2. Upload the PDF file that you want to convert to Mobi. There are several ways for you to upload the file. First, upload it from your local device. Second, drop the file to the page directly. Third, upload the file from your cloud accounts like Google Drive. Enter file URL is also supported.

Online-Convert Upload

Step 3. After uploading the file, you can change the ebook title, author, font size, and so on.

Online-Convert Setting

Step 4. Click on "Start conversion" to create your MOBI book.

3. EPUB Converter

EPUB Converter is a free Online EPUB Converter tool to help you convert e-Book files from EPUB to PDF, EPUB to MOBI, MOBI to EPUB, Kindle to PD, etc. This server will not retain your e-Book file. If the file has been converted successfully, it will be retained for 2 hours which is to give you enough time to download the file, 2 hours later, it will be deleted by the server automatically.

Step 1. Find the "EPUB to MOBI Converter" button on the side toolbar on the EPUB Converter homepage.

Epub Converter Epub to Mobi Converter

Step 2. Click the "Add File" button to choose the files you need to convert. You can upload multiple files at the same time to convert them conveniently. You can also upload files in bulk.

Step 3. After all the files you want to convert have been added to the list, click the "Start Upload" button to start conversion.

Epub Converter Start Upload

Step 4. After the file has been converted, click the download address to download the Mobi file.

Section 3 - Convert Epub to Mobi with a Desktop Program

1. Calibre

Calibre is a powerful and easy to use e-Book manager. It supports many file formats and reading devices. Most e-Book formats can be edited, for example, by changing the font, font size, margins, and so on.

Step 1. Open the Calibre software, and then click the" Add books" button to upload the file. Then select "Open". The Epub file is added to the Calibre library. If you don't have this software, you can go to the Download page to choose a suitable version according to your computer.

Calibre Add Files

Step 2. Then it will be showing up a metadata window that can help you to modify information in the title, author, publisher, and tags text. Select "OK" to return to the Calibre library.

Calibre Edit Metadata

Step 3. Then hit the "Convert books" button on the menu. Select the Output format dropdown and select "MOBI".

Step 4. Click the "OK" button to start the conversion then save the Mobi file to your computer by selecting the "Save to disk" button.

2. Epubor Ultimate

Epubor Ultimate is one of the best e-Book converters. The program supports the main e-Readers on the market, including Kindle Paperwhite, Kindle Voyage, Kindle Oasis, Kobo, etc. With Epubor Ultimate, you can convert Kindle Cloud Reader to DRM-free PDF, EPUB, Mobi, AZW3 just with one click. The EPUB to Mobi Converter in this desktop program not only supports converting DRM-free Epub books to Mobi but also supports converting DRM-protected Epub books to Mobi.

Step 1. Open the Epubor Ultimate software then drag or drop your Epub book to the uploading page.


"It can also automatically scan your library and load all purchased Kindle, Adobe, Sony, Google, and Audible books."

Epubor Ultimate Upload File

Step 2. Choose your output format. Click the "Convert to MOBI" button to start the conversion. The conversion progress will be completed within one second.

Epubor Ultimate Choose Output Format


What is The Best e-Book Format for Kindle?

Kindle supports TXT, PDF, MOBI, PRC, HTML, DOC, DOCX, JPEG, GIF, PNG, BMP formats. Mobi is the most suitable format for Kindle. For more information, you can get from 5 Different Ebook Formats, Which is The Best?.

How can I Read Free Books Online?

You can read free books on some famous websites such as Google Books, Project Gutenberg, Open Library, Manybooks, etc. Some of them offer download links as well. You can get more information from 6 Best Sites for Free Books Online Reading.


In this post, we have compared Epub with Mobi format. Meanwhile, we have shared some methods on how to convert these two kinds of formats. After reading this post, we believe that you can convert Epub to Mobi easily.

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