Add a DRM-free MOBI ebook and get a PDF with fixed pages back. Protected Kindle purchases cannot be converted.
To convert mobi to pdf, add the .mobi file, keep PDF as the output and download the result. In our test, a 55 KB mobi book with 12 chapters became a 16-page pdf of 112 KB that kept its images, its table and 15 bookmarks. A book protected by DRM cannot be converted.
Transfers use HTTPS, and files converted on the free tier are deleted after 24 hours, so the result is not a long-term archive. Quality depends on the source file, so open the PDF file once before you share it.
Need more PDF options? Open the PDF Converter hub.
MOBI (Mobipocket eBook)
A proprietary ebook format that began with Mobipocket in 2000 and passed to Amazon in 2005. The old MOBI 6 layer (KF7) has little styling, while the KF8 layer added HTML5 and CSS3 in 2011, and one file can carry both. Amazon never published a full specification, and Kindles read it from USB even though Send to Kindle has dropped it.
PDF (Portable Document Format)
A fixed-layout document format published as ISO 32000. Each page records the exact position of every character, image and line, usually with the fonts embedded, so it displays and prints identically in any reader and is awkward to edit.
A 55 KB MOBI test book with 12 chapters, a cover, 2 figures and a table, converted on indox.org
A PDF looks the same in every reader and prints the same on every printer. That makes it the right copy for a study book you want to mark up, a book to hand to someone without an ebook app, or an archive copy.
In our test the three images, the table and all 12 chapter titles of the sample book were in the PDF, and the chapters were clickable bookmarks. What you get still depends on what the MOBI itself contains.
The conversion runs on indox servers, so Windows, Mac, Chromebook, Android and iPhone work the same way. You do not need calibre or a Kindle app on the machine you are using.
Books bought from the Kindle store usually carry DRM. This converter does not remove it, so those files fail. A DRM-free MOBI that you made, sideloaded or downloaded from a public-domain source is what this page is for.
Drop the .mobi file on the box or choose it from your device. Keep the original: the MOBI is the version that reflows on a small screen.
Check that PDF is the output format and start the conversion. In our test it took 7.9 seconds from the click to Completed for a 55 KB book.
Save the PDF and open it. Look at the cover, one page with a picture and the bookmarks panel before you print or send it.
You hand over a DRM-free MOBI and take away a PDF that opens anywhere and prints as shown. The page lists what the conversion changed in a real run, so you can judge before you start whether the PDF fits your job.
The upload box shows the live size limit before you add a file. Signing in raises it; a paid plan does not change it.
MOBI in, PDF out. Pick another output on the converter if you need a different format.
Files are encrypted in transit over HTTPS and processed on indox infrastructure.
Free-tier files are kept for 24 hours after the job finishes, then deleted automatically.
| What you see | Why | What to do |
|---|---|---|
| The row shows Failed with no reason | DRM, a damaged file or a file that is not a real MOBI | Open the book in an ebook app. If it is protected, it cannot be converted here |
| Page numbers differ from my reader | The PDF has fixed pages decided by the converter | Search by chapter title or use the bookmarks panel |
| The cover looks stretched | The cover is scaled to the full page | Print without the first page, or crop it in a PDF editor |
| The PDF is on US Letter and I print on A4 | The page size is a fixed default | Use fit-to-page in your print dialog |
| A picture lost its transparent background | Images are stored as JPEG, which has no transparency | Use the original picture file if you need transparency |
| Want to keep the book reflowable instead | A PDF cannot reflow | Use EPUB to MOBI or MOBI to EPUB for another ebook format |
| Compared on | MOBI | |
|---|---|---|
| Layout | Reflowable: text adapts to screen and font size | Fixed: every line stays on its page |
| Page numbers | Set by the reader app and change with font size | Fixed, the same on every device |
| Where it opens | Kindles and ebook apps | Practically every computer, phone, browser and printer |
| Contents | Chapter list used by the reader | Bookmarks and links, plus a contents page in our test |
| Typical use | Reading a book on a small screen | Printing, annotating, sharing and archiving |
Facts checked on November 5, 2026
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Open the converter, add your .mobi file, keep PDF as the output and download the result. You do not need calibre or any software on your computer.
Usually not. Books bought from the Kindle store normally have DRM, and this converter does not remove it, so the conversion fails. Only DRM-free files convert. We did not test a protected book.
No. A MOBI reflows to the screen and a PDF has fixed pages, so page numbers are set again. Our 12-chapter test book became 16 pages including a table of contents page.
No. The converter uses default settings and our test PDF was US Letter, 612 x 792 points. If you print on A4, check the print dialog's fit-to-page option.
Yes in our test. The cover and two figures were in the PDF, the table kept its text, and chapters appeared as 15 bookmarks with 31 internal links. A contents page was also added as the last page.
The most common cause is DRM. A file that is damaged, or is not really a MOBI, also fails: our 89-byte text file renamed to .mobi showed Failed after about 2 seconds with no reason. Check that the book opens in an ebook app first.
Yes. In our test the text was extractable and the fonts were embedded in the file, so you can search and copy from the PDF.
Yes. A MOBI adapts to small screens and a PDF does not, and a PDF cannot be turned back into a clean MOBI. Treat the PDF as a print and share copy.
No. Our test ran anonymously on indox.org, and we saw no sign-up, limit or payment prompt.
Kindles read unprotected MOBI files from USB, but Send to Kindle has dropped the format. Converting to PDF or EPUB is a common way to keep reading old files.