PDF to MOBI Converter
Inspect your PDF locally, then convert it to MOBI with Calibre or an online tool, or send the original PDF wirelessly with Send to Kindle.
Use the PDF to MOBI Converter
PDF File Analyzer
Drop your PDF here
or click to select — file is not uploaded
PDF vs MOBI on Kindle
| Feature | MOBI | |
|---|---|---|
| Text reflow | No | Yes |
| Adjustable font size | No | Yes |
| Kindle bookmarks | Limited | Full |
| Highlights & notes | Limited | Full |
| Preserves layout | Yes | Partial |
| Best for | Tables, diagrams | Novels, articles |
Choose a Conversion Method
Calibre is free, open-source ebook management software that includes the ebook-convert command-line tool. It gives you the best control over output quality and metadata.
Install Calibre
Download the free installer from calibre-ebook.com. Available for Windows, macOS, and Linux. The ebook-convert CLI tool is included automatically.
Open a terminal
On Windows open Command Prompt or PowerShell. On macOS/Linux open Terminal. Navigate to the folder containing your PDF.
Run the conversion command
Replace input.pdf and output.mobi with your actual filenames:
ebook-convert input.pdf output.mobi
To override the title and author, add --title "My Book" --authors "Author Name" after the filenames.
Transfer the .mobi file to your Kindle
Connect your Kindle via USB and copy the .mobi file into the documents folder on the device. Eject safely and the book appears in your Kindle library.
for f in *.pdf; do
ebook-convert "$f" "${f%.pdf}.mobi"
done
How to Install Calibre
Windows
Download the .msi installer from calibre-ebook.com, run it, then verify with ebook-convert --version in Command Prompt.
macOS
Download the .dmg from calibre-ebook.com or run brew install --cask calibre. Then add Calibre to your PATH to use ebook-convert from Terminal.
Linux
Run sudo apt install calibre on Debian/Ubuntu, sudo dnf install calibre on Fedora, or use the binary from calibre-ebook.com.
Summary
Inspect your PDF locally, then convert it to MOBI with Calibre or an online tool, or send the original PDF wirelessly with Send to Kindle.
How it works
- Drop or select your PDF file to inspect its name, size, and estimated page count — nothing is uploaded.
- Review the PDF vs MOBI comparison table to confirm conversion is right for your document.
- Choose Calibre or an online tool for MOBI conversion, or use Send to Kindle to deliver the original PDF without creating a MOBI file.
- Follow the step-by-step instructions for your chosen method.
- Sideload the resulting .mobi file to a compatible Kindle via USB; for wireless Send to Kindle delivery, submit the original PDF or an EPUB instead.
Use cases
- Reading PDF books on a Kindle with adjustable font sizes and reflow.
- Converting academic papers or reports to MOBI for comfortable e-reader viewing.
- Sending newsletters or long-form articles to your Kindle for distraction-free reading.
- Building a Kindle library from a PDF ebook collection.
- Preparing PDFs with correct metadata (title, author) before sending to Kindle.
- Verifying a PDF's page count and file size before deciding which conversion path to use.
- Converting text-heavy PDFs where fixed layout makes Kindle reading awkward.
- Batch-converting multiple PDFs to MOBI using Calibre's command-line tool.