Free Online MOBI Converter
The older Kindle format, superseded and dropped by newer devices.
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How to convert MOBI files online
Convert Kindle MOBI ebooks to EPUB, PDF, AZW3, or FB2, escape the Kindle ecosystem and read your books on any device.
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Upload your MOBI file
Drag and drop MOBI files from your Kindle library or computer. MOBI is Amazon's legacy Kindle format, converting lets you read on non-Kindle devices.
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Select the output format
Choose EPUB for Apple Books, Kobo, and Nook; PDF for universal reading and printing; AZW3 to upgrade to modern Kindle format; or FB2 for FictionBook readers.
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Download and transfer
Download the converted ebook and sideload it to your eReader. Chapter structure, cover art, and metadata are preserved across formats.
Reasons to convert MOBI files
MOBI is Amazon's proprietary format. Convert to EPUB to read your books on Apple Books, Kobo, Nook, or any open eReader.
MOBI is the legacy Kindle format. Convert to AZW3 (KF8) for enhanced typesetting, better font rendering, and responsive layouts on newer Kindles.
Convert MOBI to PDF to create printable versions of your Kindle books with proper page layout and margins.
Amazon has deprecated MOBI in favor of AZW3 and KFX. Convert now to EPUB or AZW3 before MOBI support is further reduced.
DRM-free MOBI files can be converted to PDF or EPUB for sharing. Note: DRM-protected files cannot be converted.
Your phone, tablet, or computer may not have the Kindle app. Convert MOBI to EPUB or PDF for native reading on any device.
Convert MOBI ebooks online, no desktop apps, no plugins. No watermarks added, formatting preserved, and files are deleted from our servers within 1 hour.
About the MOBI Format
MOBI is an ebook format originally developed by Mobipocket SA and later acquired by Amazon in 2005 for use on Kindle devices. Based on the Open eBook standard with proprietary extensions, MOBI supports reflowable content, bookmarks, annotations, and basic formatting including images, tables, and text styles. It became the primary format for personal documents and sideloaded content on Kindle eReaders, working on every Kindle model ever produced.
Amazon has since deprecated MOBI in favor of the more capable AZW3 (KF8) and KFX formats, which support enhanced typesetting, embedded fonts, and responsive layouts. As of 2022, Amazon's Send to Kindle service no longer accepts MOBI files for email delivery. However, MOBI remains widely used for legacy Kindle compatibility and is still supported by many third-party reading apps. Converting MOBI to EPUB allows reading on non-Kindle devices, while converting to AZW3 provides a modern Kindle reading experience.