What is the Difference between ePUB & ePUB3?

What is the Difference between ePUB and ePUB3?

If you’re an aspiring author, you’ve probably heard of ePUB and ePUB3. But what’s the difference between the two? In this post, we’ll explain the critical differences between these two formats so that you can choose the right one for your needs.

ePUB and ePUB3 are eBook formats, adhering to specific standards set out by the International Digital Publishing Forum. While they are very similar in appearance, there are significant differences between how these specifications handle various aspects of eBook creation that can significantly affect what you see when viewing an eBook.

What is an ePUB Format?

ePUB is a digital file format used to create and distribute eBooks. It is a standard format that most eBook reading devices support.

The ePUB file format is best suitable for electronic publications with reflowable text. It is more like a  marked-up document structure with associated images and illustrations.

The ePUB format is accepted and distributed by most major eBook stores and platforms, including Google, Apple’s iBooks, Barnes & Noble’s NOOK, and KOBO.

What is an ePUB 3 File?

ePUB 3 is the latest version of ePUB, and it is an HTML5 standard-based file format. It allows the ePUB 3 files to contain videos, audio, and interactive multimedia elements. In a nutshell, it’s an enhanced and more versatile version of the ePUB format. It allows for more multimedia content, interactivity, and animation.

ePUB 3 format makes it perfect for digital textbooks, cookbooks, travel guides, and other types of interactive content. If you’re thinking about self-publishing an eBook or want to make your current eBook more engaging, you should consider using the ePUB 3 format.

ePUB 3 file is best suitable for a fixed-layout eBook, which heavily depends on images and videos.

The Features of both ePUB & ePUB 3 Versions

  • One of the main benefits of the ePUB files for readers is that it allows a book’s text to automatically adjust or “reflow” for different screen sizes, such as those for smartphones, netbooks, and eReader devices. 
  • The ePUB version allows publishers to control document presentation through style sheets. ePUB 3 also provides audio, including synchronization of text and audio and text-to-speech synthesis.

Differences between ePUB & ePUB 3 Version

  • ePUB 2 does not support scripts and interactivity features. ePUB 3 version supports scripted content, i.e., interactivity, using JavaScript language.
  • ePUB 2 does not support the text-to-speech facility. ePUB 3 provides text-to-speech facility (Pronunciation Lexicons (PLS), Inline SSML Phonemes, CSS speech  features). It also enables the usage of SMIL (Synchronized Multimedia Integration Language) for representation of synchronized text and audio.

The ePUB 3 is the latest version of ePUB that includes many new features, including better accessibility. It also improves on previous versions by supporting a wider variety of fonts and text styles, allowing for more control over how your content looks when read.

Suppose you are unsure which format to use to reach the widest audience possible with your eBook or digital publication. In that case, it may be worth looking into what each has to offer before making a decision – both formats have their advantages!

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