How to Convert PDF to KFX? (Online and Offline)

Ever tried reading a PDF on your Kindle? It must not be a fun experience, if I am not wrong. The text stays fixed, the font is too small, and scrolling is a hassle.

That's why converting PDF to KFX makes sense. It lets you adjust text size, change fonts, and enjoy better readability. But how do you convert a PDF to KFX? There are online tools, software solutions, and even a few manual methods.

In this guide, we will explore two methods to get it done. And before conversion, if you want to edit, annotate, or manage your PDF, we have a solution!

Download UPDF and make your PDFs Kindle-ready today!

Part 1. What is a PDF?

PDF stands out for "Portable Document Format." It is the most commonly used type of file. The biggest benefit of using PDF is that it keeps everything in place. Whether your file contains text, images, and layout, it will stay in the same format—no matter where you open it. That's why it's great for reports, eBooks, and forms.

But PDFs aren't always easy to edit or read on every device. They don't adjust well on smaller screens, like Kindles. That's where conversion helps. Turning a PDF to KFX makes it easier to read on Kindle, with features like adjustable text. Before converting, tools like UPDF let you easily edit and organize your PDFs.

Part 2. What is KFX?

KFX is Amazon's special eBook format for Kindle. It makes reading easier with adjustable text, better fonts, and smoother page turns. Unlike PDFs, KFX files fit the screen perfectly. There is no zooming, no weird formatting, just a clean, easy-to-read page. Kindle also adds cool features like word lookup and better text flow.

But here's the thing—you can't just save a file as KFX. You need to convert it first. But apart from being easy to read, why would anybody want to convert a PDF to KFX?

Let's find it out in the next section!

Part 3. Why Convert PDF to KFX?

Here's why switching to KFX is a better choice:

• Better readability – KFX adjusts to screen size, so no zooming or side-scrolling.
• Adjustable text – Change font size, style, and spacing for a comfortable read.
• Faster page turns – Kindle loads KFX files quicker, making navigation smooth.
• Extra features – Enjoy word lookup, highlights, and dynamic text flow.
• Smaller file size – KFX compresses better, saving storage space.

Now that you know about the reason, let's jump to the methods to convert PDF to KFX!

Part 4. How to Convert PDF to KFX? (2 Ways)

In this section, we will explore two ways (online & offline) to convert PDF files to KFX format. You can walk through their guides and see which one works for you.

1.    Via Any eBook Converter (Offline)

Any eBook Converter is a great tool for converting PDF files to KFX on your computer. It processes files quickly and ensures the text adjusts perfectly for Kindle. The good part? It works offline. This means you don't need an internet connection.

You can easily turn static PDFs into readable eBooks using its "PDF to KFX" feature. The layout stays clean, and the text becomes adjustable.

Here is how you can convert PDF to KFX using Any eBook Converter:

Step 1: First, download and install the Any eBook software on your PC/laptop. When the installation is completed, a window will appear; click "Start Now" to open the software.

Step 2: Next, click the "Add ebook" button on the top left corner and select your PDF.

Step 3: Once the PDF file is exported, click the "Settings" icon and select the output location. Then, click "OK."

Step 4: Next, click the "V" button to open the menu and choose "KFX." Then click "Convert to KFX."

Step 5: After the conversion, you can find the KFX file by clicking the "History" icon at the top right.

That's it! But if you don't want to download any software, you can try the next method.

2.    Via Send to Kindle (Online)

Send to Kindle is basically Amazon's built-in tool. It is designed to convert PDFs to KFX online. The tool is very simple. All you gotta do is upload your PDF through the Kindle web page, and Amazon will automatically convert it into a Kindle-friendly format.

However, to use this feature, you must have an internet connection. The biggest benefit is that you can use it anywhere. It comes with various options and their step-by-step guides.

Here is how to convert PDF to KFX online using the "Send to Kindle" web feature:

Step 1: Open your browser and search for Amazon Send to Kindle, or click here. Open the first link and sign in to your Amazon account. If you don't have any, create one by clicking "Sign Up."

Step 2: Click "Select files from device" and upload the PDF you want to convert to KFX.

Step 3: When you see that the PDF is uploaded successfully, click the "Send" button.

Step 4: After a few minutes, check the status. If it's shown as "In library," you can access it from Amazon's library.

Did you see how simple it is to convert PDF to KFX online? But before converting, it's a good idea to edit or organize your PDF. Let's explore how you can do that!

Also Read: How to Convert KFX to PDF? (Online and Offline)

Part 5. Bonus Tip: How to Edit the PDF Before Converting?

Need to make changes to your PDF before converting? Maybe fix formatting, add notes, or remove extra pages? UPDF makes it easy.

Compared to other PDF editors, UPDF is very economical. It gives you all the advanced tools plus AI features at an affordable price.

You can edit text, images, and layouts with just a few clicks. No hassle. Just a smooth, user-friendly experience.

So, before you convert your PDF to KFX, make sure it's perfect. Download UPDF today and get everything done in one place!

Here is how you can edit your PDF using UPDF:

Step 1: Open UPDF, click the "Open File" button, and select your PDF. You can also drag and drop your PDF file here.

Step 2: After opening the PDF, you will enter reader mode by default. Now click "Comment," which will open an annotation toolbox at the top.

With these tools, you can highlight, underline, and strikethrough text. You can also add notes, stickers, signatures, and even stamps.

Step 3: Next, click the "Edit PDF" button to open the editing options. Here, you can add/remove text, images, and links. You can also change the formatting and layout.

Step 4: Click the "Organize Pages" button and use the above options to insert, replace, extract, and split the pages. You can also organize the pages using the drag-and-drop method.

Apart from that, you can also crop the pages. Or use the UPDF AI Assistant to ask questions related to the PDF content. It also allows you to summarize, translate, and even explain the content. Watch this video below and check out this review article to learn more!

In The End

Wrapping it up! So, now you know that turning PDF to KFX is pretty simple. It makes Kindle reading way smoother. Just pick a method that works best for you. But before converting, make sure your PDF looks good. UPDF helps you edit, organize, and clean it up easily. Try it out—download UPDF and see for yourself!