EPUB is one of the most famous formats used by ebook publishers for publishing their books on multiple platforms. The reason for its popularity lies in the fact that it is designed for reflowable content, allowing the text to be optimally rendered by the reader software on any display device. The format is natively supported by all modern ebook readers such as Amazon Kindle series and Barnes & Noble Nook series, and a wide range of ebook reader apps available for PC, Mac, iOS, Android, Windows Phone and many other operating systems also have EPUB support. However, the tool we have today does not focus on reading EPUB files. Tweak EPUB is a portable application for Windows that enables you to edit EPUB files and save the edited versions while retaining all the original formatting. What’s even better, it lets you perform the editing in your favorite text editor.
During installation, the setup program offers you to install a lot of other free tools along with Tweak EPUB. Make sure to uncheck them all in order to avoid getting unwanted software on your computer.
As soon as you launch the application, a file browser will open over the main window, allowing you to choose the EPUB file that you want to edit.
Once you load a file, you will be able to see the list of all its pages separately, making it easier for you to locate the page(s) that you want to edit. Double click any page from the list to open it in the default text editor. In my experience, Notepad was selected as the default text editor and I had to change it to WordPad because the former doesn’t support CSS-style formatting. You can change the default editor to your favorite one using the Choose Editor button.
When you have selected the desired editor, just double-click a page from the list to open and edit it just as a normal document.
When done with editing, save the file, close it and hit the Save Changes button on the main interface.
You can view the changes by opening the file in any EPUB reader such as FBReader that we have used in our testing.
What makes Tweak EPUB great is the level of simplicity it offers in editing EPUB files. The portable app works on both 32-bit and 64-bit versions of Windows XP, Windows Vista, Windows 7 and Windows 8.