PDF files are one of the most used formats for sharing all kinds of documents, including of course books. However, when it comes to reading those PDFs on mobile devices or e-book readers like the Amazon Kindle, the reality is that they don’t look so good, or they aren’t compatible with the apps that manage our eBook libraries.
This can be fixed converting PDF to eBook either to the popular EPUB format that is compatible with almost all readers, to MOBI, or to proprietary formats such as Amazon’s AZW3 for Kindle or Sony’s BbeB.
Caliber, the solution for everything
Yes convert PDF files to ePub or any other e-book format is something you do or plan to do frequently, then all you need to do is download and install Caliber. This ebook manager does everything and is extremely easy to use.
You can download Caliber for Windows, Linux or macOS from the official website. Installation is extremely simple and once you start the program for the first time you only need to do a couple of extra clicks to convert your PDFs.
First you must click on Add books to add the PDFs to your Caliber library. Select all the ones you want from your disk and once you have done that, they will all appear listed with title, author, date and other details.
In the list select the PDF or PDFs you want to convert and click on the icon Convert books. This will open a new window with multiple options to edit the document metadata and select the output format to convert.
On the right of the window if you click on the menu Output format you can choose whether to convert to EPUB, MOBI, AZW3 and many more. When you have chosen simply click on To accept.
Once Caliber finishes the operations, you just have to click on the book in the list to see the description on the right and get details about the different formats in which your book is now available.
If you click on Press to open, Caliber will take you to the folder where all the versions of your ebook are located. From there you can copy the book to another folder, device or send it online.
If what you want is send a PDF to your Kindle or other deviceYou do not need to convert it manually beforehand, Caliber does it automatically to the correct format when you manage your ebook library with the program.
Other online alternatives
If you don’t want to download a program like Caliber, you can use something like Nimbooks to organize ebooks, comics, and magazines in the cloud. Nimbooks supports PDF files and can convert them to the proper format whenever you want to view them on your ebook reader.
If you want one free and easy-to-use online tool to convert PDF you can try Online ePub converter. From there you can upload your PDF files from your disk, or use the ones you have Dropbox or Google Drive. You can convert to EPUB, AZW, MOBI and more.
An alternative similar to the previous one is To ePub, it also lets you convert PDF to EPUB, MOBI, AZW3 and more, easy and fast. The difference between this and Caliber is that with the latter you don’t need to upload your PDFs to anyone’s cloud in case it is a sensitive document.
Adapt the PDF format to an e-book reader
Now all the solutions mentioned they only take care of converting one format to another so that it can be read by an app or device, what it does not do is give it precisely the best format, and those who have read a PDF on a Kindle know that they are usually uncomfortable, especially if the document has several columns.
There is a tool called k2pdfopt that tries to solve that problem. What k2pdfopt does is transform the text within the PDF and adapt it to the type of screen on which it will be viewed, be it a reader like the Kindle or a Smartphone.
The version does not have the best interface in the world, in fact only the Windows version has a graphical interface. The versions for macOS and Linux work from the terminal. But its usefulness is undeniable.