Free Online EBook Converter (MOBI, EPUB, PDF and other)

eBooks have become a very important part of our lives. Whether you love reading books, writing your own stories, or studying for exams, eBooks are a helpful tool. They are easy to carry, simple to read on different devices, and often free to download. But sometimes, your eBook may not open on your device because it is in the wrong format. This is where a free online eBook converter comes in handy.
 

Using Online-Convert, you can quickly and easily change your eBook into the format you need. Whether you want to convert a PDF to EPUB, MOBI to PDF, or DOCX to EPUB, it can be done in just a few seconds. Best of all, it’s completely free and works on almost all devices.
 

In this article, you’ll learn everything about using a free online eBook converter. We will also explore the types of eBook formats, how to convert them, and why Online-Convert is one of the best tools out there.
 

What is an eBook Converter?

An eBook converter is an online tool that changes one file format into another. For example, you may have a book in PDF format, but your Kindle device only supports MOBI or AZW. The eBook converter helps you transform that PDF into MOBI so that you can read it without any problem.
 

These tools are very helpful when:

  • Your device does not support the current file format.

  • You want to reduce the file size.

  • You want better readability.

  • You want to upload your book to an eBook store (some stores accept only specific formats).

The best part? With Online-Convert, you don’t need to download any software. Everything works in your web browser.
 

Why Use a Free Online eBook Converter?

There are many reasons to use a free online eBook converter like Online-Convert. Here are some of the top benefits:
 

1. No Installation Needed

You don’t have to download or install any software. All you need is an internet connection and a web browser.
 

2. Free to Use

There’s no cost involved. You can convert unlimited eBooks for free.
 

3. Multiple Formats Supported

It supports many eBook formats like EPUB, MOBI, PDF, AZW3, FB2, and more.
 

4. Works on All Devices

It works on Windows, Mac, Linux, Android, and iOS. You can even use it from your tablet or phone.
 

5. Fast and Easy

You can convert files in just a few seconds. The user interface is very simple and clear.
 

6. No Registration Required

You don’t need to sign up or share personal information.
 

Popular eBook Formats You Can Convert

Different devices support different eBook formats. Here are the most popular ones:
 

EPUB (Electronic Publication)

  • Widely used on eReaders like Kobo and Apple Books.

  • Supports reflowable content, which adjusts to screen size.

  • Ideal for novels and textbooks.
     

MOBI

  • Mostly used by Amazon Kindle devices.

  • Great for books with simple text and images.
     

AZW & AZW3

  • Amazon’s custom formats for Kindle.

  • Improved features over MOBI like DRM support.
     

PDF (Portable Document Format)

  • Fixed layout, best for printing and academic use.

  • Works on almost all devices, but not reflowable.
     

FB2 (FictionBook)

  • XML-based format is popular in Russia and Eastern Europe.

  • Easy to convert and simple to edit.
     

DOCX or TXT

  • Basic formats that can be converted into eBooks.

  • Often used by writers before publishing.

Using Online-Convert, you can change between any of these formats easily and quickly.
 

How to Use Online-Convert for eBook Conversion

Here is a step-by-step guide to using Online-Convert:
 

Step 1: Open the Tool

Go to the eBook converter section of Online-Convert.
 

Step 2: Select the Output Format

Choose the format you want to convert your eBook to — for example, EPUB, MOBI, or PDF.
 

Step 3: Upload Your File

Click the "Choose File" button and upload your eBook. You can also enter a URL or select from cloud storage like Google Drive or Dropbox.
 

Step 4: Adjust Optional Settings

You can set:

  • eBook title

  • Author name

  • Font size

  • Paper size

  • Book cover (upload image)
     

Step 5: Start the Conversion

Click on the “Start Conversion” button. The tool will take a few seconds to convert the file.
 

Step 6: Download the Converted File

After conversion, you can download the new eBook format directly to your device.
 

Why Choose Online-Convert?

Here are the main features that make Online-Convert better than other tools:
 

1. Supports All eBook Types

You can convert to and from all major formats, including EPUB, MOBI, AZW3, PDF, FB2, LIT, LRF, and more.
 

2. User-Friendly Interface

Even if you are not tech-savvy, you can use it without any difficulty.
 

3. Multiple Upload Options

Upload from your computer, URL, or cloud platforms like Google Drive or Dropbox.
 

4. Custom Settings

You can personalize your eBook by adding a title, author name, or cover image.
 

5. No Limits

Convert unlimited files, anytime, anywhere — no sign-up, no credit card, just convert and download.
 

6. Fast Conversion

Most conversions are done in less than a minute.
 

Other File Types Supported by Online-Convert

Online-Convert is not just for eBooks. It also supports other types of files:
 

Document Converter

Convert DOC, DOCX, PPT, ODT, XLS, and more to PDF or other formats.
 

Audio Converter

Convert MP3, WAV, OGG, FLAC, and other formats.
 

Video Converter

Convert MP4, AVI, MOV, and others.
 

Image Converter

Convert JPG, PNG, SVG, WEBP, and more.
 

Archive Converter

Convert ZIP, RAR, TAR, 7Z, and more.
 

Software & Web Formats

Convert Android APK files or web code formats like HTML, CSS, and JS.

This makes it an all-in-one tool for all types of users — students, professionals, authors, designers, and developers.
 

Tips for Converting eBooks Successfully

To get the best results from your conversion, keep these tips in mind:
 

1. Check Your File Format

Before uploading, check what format your device supports.
 

2. Use Clear File Names

Give your files simple, clear names like "MyBook.epub" to avoid confusion.
 

3. Add Metadata

Use the optional settings to include the title and author name.

 

4. Use a Proper Cover Image

If you're converting your book, add a high-quality cover image.
 

5. Test on Your Device

After downloading, open the eBook on your eReader or app to make sure it works well.
 

Who Can Use Online-Convert?

This free online eBook converter is helpful for:

 

Readers

Want to read a book on your Kindle, iPad, or smartphone? Convert it to the right format in seconds.
 

Writers and Authors

If you’re self-publishing a book, you need to provide your readers with different formats. Use Online-Convert to prepare EPUB, MOBI, and PDF versions of your book.
 

Students

Need to convert class notes into PDFs or eBooks? This tool helps you do that easily.
 

Bloggers and Content Creators

Turn your blog posts or tutorials into eBooks and share them with your audience.
 

Businesses and Marketers

Convert reports and whitepapers into downloadable eBooks to grow your email list.
 

Safe and Private

You don’t need to worry about your files being misused. Online-Convert is a trusted tool used by millions of people around the world. Your files are deleted from the server after a short period, ensuring privacy and safety.
 

Offline Alternatives

While Online-Convert is great for online use, some people may want offline tools. These software options can also convert eBooks:

  • Calibre (Free and open-source)

  • Any eBook Converter

  • Hamster Free eBook Converter

But remember, these tools need to be downloaded and installed. Online-Convert is easier because it runs on your browser and doesn’t use your system resources.
 

Summary

Converting eBooks has never been easier. With Online-Convert, you can quickly change file formats like PDF to EPUB, DOCX to MOBI, or AZW to PDF for free. There is no need to sign up, no installation, and no fees. It works on all devices and supports many file types.
 

This tool is perfect for students, writers, readers, or anyone who deals with digital files. It saves time, simplifies your tasks, and ensures your eBooks are always readable.
 

Final Thoughts

If you are looking for a simple and free solution to convert eBooks and other files online, Online-Convert is your best choice. You get speed, simplicity, and power — all for free.
 

Stop wasting time with complex software. Visit Online-Convert now and start converting your eBooks in seconds. Whether you want to read, share, publish, or archive — this tool is all you need.