Are EPUB Files Safe

Are EPUB Files Safe?

5 mins

EPUB files are becoming more popular each day. With the rise of e-readers, people are looking for ways to read books electronically. One common file type used to distribute e-books is the EPUB file. But are they safe?

While EPUB files in and of themselves are not dangerous, they can certainly contain malicious code.

For example, an EPUB file can easily be booby-trapped with malware or other harmful software.

In general, it’s always best to exercise caution when opening any email attachment, even if it seems to come from a trusted source.

What is an EPUB file and What are its Uses?

EPUB is an open standard file format for digital books, created by the International Digital Publishing Forum (IDPF).

The format is designed specifically for reflowable content, meaning that it adjusts to fit different screen sizes and works well on small screens, such as those found on mobile phones and e-readers. EPUB files are typically composed of HTML and CSS.

That makes them easy to create and edit. They can also include audio, video, and other multimedia content.

Because they are based on open standards, EPUB files can be read on a variety of devices and platforms, including Amazon Kindle, Apple iBooks, Barns & Noble Nook, Sony Reader, Kobo eReader, and many more.

In addition, EPUB files can be opened in a variety of software applications, such as Adobe Digital Editions, Calibre, iBooks Author, and Sigil.

As the popularity of digital reading continues to grow, the EPUB format is likely to become increasingly important.

Are EPUB Files Safe?

There are a lot of different file formats out there, and each one has its own set of risks. For example, PDFs can contain harmful malware, while .exe files can be used to distribute viruses.


Even seemingly innocuous formats like .epub can pose a risk to your computer if they’re not handled carefully. So what exactly is a .epub file, and why is it considered dangerous?

A .epub file is a type of e-book file that can be read on various devices, including computers, tablets, and smartphones.

  • One of the things that makes .epub files dangerous is that they’re often compressed into ZIP files or EXE archives, which can contain viruses.
  • In addition, because .epub files are often downloaded from the internet, they can be infected with malware before you even open them.

To protect yourself from these risks, make sure you have a good antivirus program installed on your computer, and only download .epub files from trusted sources.

How Can You Prevent From Opening Dangerous EPUB Files?

EPUB is a file format that reflows text to fit different screen sizes and implies support for other ebook features such as interactive tables of contents, footnotes, and audio/video playback.

The format is based on XHTML and XML and uses a compressed ZIP file for the container.  While EPUB offers many benefits, it also has some risks associated with it.

Here are some steps you can take to prevent opening dangerous EPUB files:

Step-1. Check the File Extension:

One way to tell if an EPUB file is safe is to check the file extension. If it ends in .epub, it’s likely a safe file. However, if it ends in .exe or .dmg, it’s likely a malicious file masquerading as an EPUB.

Step-2. Inspect the File Size:

Another way to tell if an EPUB file is safe is to inspect the file size. If the file is suspiciously small or large, it may be a sign that the file has been tampered with.

Step-3. Use Antivirus Software:

As with any type of file, you should always scan EPUB files with antivirus software before opening them. This will help to detect any malicious code that may be lurking in the file.

Step-4. Be Cautious of Email Attachments:

If you receive an EPUB file as an email attachment, be sure to check that it comes from a trusted source before opening it. Keep in mind that email attachments are one of the most common ways for malware to spread.

Step- 5. Add Spam Filtering Service:

You can add a spam filtering service, which will prevent any malicious files from entering your device and keep you safe from malware and spam.

Step-6. Use a Reputable EBook Reader:

When reading EPUB files, be sure to use a reputable eBook reader such as Adobe Digital Editions or Calibre. These readers have built-in security features that can help protect you from potentially dangerous files.

By following these steps, you can help to protect yourself from opening dangerous EPUB files. Remember that taking precautions with any type of file is always the best strategy for staying safe online.

Is EPUB Safer Than Pdf?

If you’re looking for a way to protect your content, then you might be wondering if EPUB is safer than PDF. The answer is yes – EPUB is definitely more secure than its PDF counterpart.


Here’s why:

  • First, When you create an EPUB file, your content is automatically encrypted. This means that anyone who tries to open the file will need a password in order to access it. On the other hand, PDF files are not encrypted by default, which means that anyone can open them without any restrictions.
  • In addition, EPUB files are much harder to copy and distribute than PDFs. This is because they are designed to be read on specific devices and platforms, such as e-readers and smartphones. PDF files, on the other hand, can be easily copied and distributed without any restrictions.
  • Finally, EPUB files are also more difficult to edit than PDFs. This is because they are designed to be read on specific devices and platforms, which makes it harder for someone to make changes to the file without your permission.

So, if you’re looking for a more secure way to protect your content, then EPUB is definitely the way to go.

What Makes EPUB Files Better Than PDF Files?

EPUB files have a lot of advantages over PDF files.

  • For starters, they’re more versatile. You can read EPUB files on a variety of devices, including smartphones, tablets, and e-readers. And since they’re designed specifically for reflowable text, they’re much easier to read on small screens.
  • Additionally, EPUB files are also more accessible than PDF. They can be read by screen readers and resized to fit different font sizes. And because they use HTML and CSS code, they’re much more accessible to people with disabilities.
  • Finally, EPUB files are more interactive than PDF. You can include audio and video content, as well as interactive elements like quizzes and polls. Plus, you can easily create links to other resources on the web.

So if you’re looking for a format that’s more versatile, accessible, and interactive than PDFs, then EPUBs are the way to go.

Final Thoughts

In general, EPUB files should be safe. However, as with anything digital, there is always the potential for something to go wrong.

If you’re concerned about the safety of your EPUB files and want to ensure that your data is protected, we recommend using a reliable security solution like Bitdefender.

With proper protection in place, you can rest assured that your files are safe from harm and that your privacy is protected.


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Michael Fied

founder of and SpamBurner

Michael Fied is the founder and CEO of and SpamBurner. In addition, he’s an internationally top-rated and award-winning website advisor and website architect with a global team of 55. You can find Michael on LinkedIn or contact him directly here.

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