If you are an ebook enthusiast, you likely already know about Calibre. But how do you actually use Calibre with a Kindle? This is one of the most common questions for readers looking to take full control of their digital library.
In this guide, we’ll explore the essential relationship between Calibre and Kindle, including how to dedrm kindle(remove kindle drm), convert kindle ebook formats, and wirelessly send books to your kindle for seamless library management.
Is Calibre for Kindle free?
Yes, Calibre is 100% free. It is an open-source project developed and maintained by Kovid Goyal. There are no "paid" versions, monthly subscriptions, or hidden fees for the core software. If you want to handle kindle books with Calibre, you will no need to pay any extra money.
Part 1. DeDRM kindle and kindle format Conversion with Calibre
Can I put Kindle books in Calibre?
Yes, you can. To add Kindle books, you just need to find your kindle downloads, and then drag and drop it to Calibre.
However, there is a significant "catch." While you can technically drag and drop any Kindle file into Calibre, Amazon’s DRM prevents you from reading, converting, or moving those books to other devices unless you remove Kindle drm from it. See the screenshot shows that I tried to open the just added kindle books.
Kindle DRM prevents users from backing up their purchased books, converting formats, or reading them on non-Kindle devices. If you need to convert your kindle books to other formats, or even read kindle books on any other device, the first step is to removing kindle drm. So comes to the question: Can I dedrm Kindle books with Calibre?
Actually, Calibre itself has not drm-removing feature. With the drm plugin install, you can easily remove drm from ebooks with Calibre. "
Before converting kindle books, the first step is removing kindle drm.
Calibre DeDRM Kindle
Here are the general steps of cracking kindle books with Calibre dedrm plugin:
- 1. Install Dedrm plugin to Calibre.
- 2. Install Kindle for PC or Mac and sign in with your Amazon account.
- 3. Download your purchased Kindle books to your computer.
- 4. Open Calibre and click “Add books” to import the downloaded files.
- 5. Ensure DRM is removed during the import process.
Dedrm Plugin 10.0.9 Kindle kfx-zip input
After installing a compatible DRM-removal plugin and restarting Calibre, DRM removal usually happens automatically when Kindle books are added. If a book converts successfully, DRM has already been removed.
Strengthening Kindle DRM and Kindle Firmware Blocks in 2026
Recent Kindle firmware updates (like v5.18.5) have made it significantly harder to remove DRM from purchased books. Some old kindle Models still compatible with the Calibre dedrm plugin, but if your kindle firmware has updated to 5.18.5 or later version, you will find no way to remove drm from kindle device. Newer DRM uses account-specific "secrets" that are hidden on the device, making it nearly impossible for Calibre plugins like DeDRM to work on books published after mid-2025.
Calibre DeDRM Kindle Solution to the latest kindle drm 2026
The good news is that Calibre has the updated solution to this kindle drm change. You can use Kindle for PC v2.8 as a "bridge" to download files and set up the latest DeDRM v10.0.15 plugin to extract the kindle key file for decrypting kindle books. You will bypass this newer kindle drm.
How to Convert Kindle Books to EPUB or PDF
To convert Kindle books successfully, the book must first be downloaded locally and imported into Calibre without DRM restrictions. If you've followed the above step, I guess you've already obtained the drm-free kindle books.
Follow these steps to convert your DRM-free books within Calibre:
- Step 1: Select the book you want to convert in your Calibre library.
- Step 2: Click the Convert books button in the top toolbar.
- Step 3:
In the top-right corner of the conversion window, choose the desired output format:
EPUB – Recommended for iPads, Kobo eReaders, and mobile reading apps.
PDF – Suitable for printing or fixed-layout reading, though text will not reflow or resize easily. - Step 4: Click OK to start the conversion. You can monitor the progress by clicking the Jobs icon in the bottom-right corner of the Calibre window.
Once converted, the new format will appear alongside the original Kindle file in Calibre’s library.
Part 2. Send Books from Calibre to Kindle
Amazon Kindle is not the only source that you can obtain ebooks. But if you do have ebooks want to send to kindle device, here are different methods to send books from Calibre to your Kindle. The "best" method depends on whether you value wireless syncing or highest formatting quality.
Method 1: The Wireless "Send to Kindle" Method (Best for Syncing)
This is the most popular method because it allows your reading progress, notes, and highlights to sync between your Kindle and the Kindle app on your phone.
1 Whitelist your Email.
Go to your Amazon account under Manage Your Content and Devices > Preferences.
Scroll down to Personal Document Settings and add your personal email to the Approved Personal Document E-mail List.
2 Configure Calibre
In Calibre, go to Preferences > Sharing books by email.
Click Add email and enter your @kindle.com address, which can be found in your Kindle device settings on Amazon.
3 Set the supported email format.
Set the Formats option to EPUB. Amazon no longer supports MOBI files when sending books by email.
4 Configure SMTP settings (Gmail example).
Use smtp.gmail.com as the server, set the port to 587, and enable TLS encryption.
Important: You must use a Google App Password instead of your regular Gmail password to authenticate successfully.
5 Send books to your Kindle via email.
Right-click any book in Calibre, then select Connect/share > Email to [yourname]@kindle.com to send it directly to your Kindle.
Method 2: The USB Sideload Method (Best for Privacy & Quality)
Use this if you want the "real book" experience with custom fonts and the KFX format, which provides the best typesetting.
1. Format Preparation: Ensure your book is in AZW3 or KFX. (If you use KFX, you must install the KFX Output plugin in Calibre).
2. Connect: Plug your Kindle into your computer via USB. Calibre will display a "Device" icon in the top toolbar.
3. Send: Select your book(s) and click Send to device.
4. The "Cover Fix": You sideload a book, the cover looks perfect, but once you turn on Wi-Fi, it disappears.
The Cause: Amazon’s system overwrites sideloaded thumbnails with generic icons if it can't find a matching ASIN on its servers.
The Fix:
1. Sideload your books via Calibre and eject your Kindle.
2. Turn on Wi-Fi and wait for the covers to disappear.
3. Reconnect the Kindle to Calibre. Calibre will detect the missing covers and automatically restore them to a specific cache folder that Amazon’s system doesn't overwrite.
Part 3. Manage Kindle Library with Calibre
Kindle’s built-in library works well for small collections but offers limited organization options. Calibre provides advanced tools for managing large ebook libraries.
1. "Document" Tags
By default, sideloaded books are often tagged as "Personal" or "Docs" instead of "Books," which hides features like "About This Book."
The Technical Fix:
Always convert your books to KFX format using the Calibre KFX Output plugin before sideloading. This unlocks Enhanced Typesetting, smoother font rendering, and better page-turn animations.
Or you can replace the Personal Doc Tag with [EBOK] as this is more reliable.
2. Highlight and Annotation Extraction
Kindle devices store your highlights and notes in a local file called My Clippings.txt.
Fetch Kindle books Annotations: Calibre can automatically extract these highlights when you plug in your device.
Export Kindle annotations: Through the Annotations Plugin, Calibre can pull these notes into your library's metadata (specifically the "Comments" field) so they are searchable on your computer.
You can export these notes into structured formats (CSV, Markdown) to feed into note-taking apps like Notion or Obsidian.
3. Kindle "X-Ray" and "Word Wise" Supplement
Official Amazon books have "X-Ray" (character bios) and "Word Wise" (definitions above difficult words). Sideloaded books do not.
WordDumb Plugin: This Calibre plugin can generate Word Wise and X-Ray files for your sideloaded books by looking up terms in dictionaries and Wikipedia, then transferring those data files to your Kindle alongside the book.
4. Advanced "Series" Logic (Metadata Plugboards)
Kindle devices often struggle to sort sideloaded books by series order.
Calibre uses Metadata Plugboards to rewrite the title during the transfer without changing the original file.
Example: It can change "The Fellowship of the Ring" to "[Lord of the Rings 01] The Fellowship of the Ring" so the books appear in perfect chronological order on your Kindle’s home screen.
5. Personal Cloud Server (Content Server)
You don't need a USB cable or Amazon’s cloud to move books.
Local Bookstore: By turning on the Calibre Content Server, your computer becomes a website. You can open the Experimental Browser on your Kindle, type in your computer’s IP address, and browse your entire library to download books wirelessly.
OPDS Feeds: It provides a standardized feed that allows other e-ink devices or apps to "shop" from your personal collection.
6. Edit metadata such as title, author, and cover
Calibre allows you to edit ebook metadata so your library stays clean and well organized across devices. Metadata includes the book title, author, series, cover, tags, and other details that determine how a book appears on your Kindle or eReader.
To edit metadata, select a book in Calibre and click Edit metadata in the top toolbar. In the editing window, you can change the title, author name, series information, tags, publisher, language, and book description. You can also replace or download a new cover image. Once saved, the changes are immediately reflected in Calibre’s library view.
Calibre also supports bulk metadata editing. By selecting multiple books and using Edit metadata in bulk, you can apply the same author name, tags, or publisher to many titles at once, which is especially useful for large libraries or book series.
Conclusion
Kindle provides an excellent reading experience, while Calibre offers control, flexibility, and long-term ownership of your ebook library. Used Calibre for Kindle, you can manage, convert, and protect your kindle books without being locked into a single platform.
Once properly set up, Kindle and Calibre form a stable and powerful ebook management system. If you prefer a much easier way to manage your Kindle books, Epubor Ultimate should be your first option. No command lines. No plugins. This all-in-one ebook drm removal, converter, editor and managers can do all jobs with clicks. Just download it now to give it a shot.
Iris Yan is a passionate member of the Epubor team, dedicated to enhancing your ebook reading experience. She shares insightful tips, tricks, and practical advice to help you get the most out of your digital library. Join her on the journey to reading excellence today!
