Convert MOBI to TXT online for free.
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Checking files and selected output formats.
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Plain text strips formatting entirely — no fonts, no layout, no images. Convert to TXT when you need to pipe content into a script or CSV import, or when a legal / archival requirement specifies "no formatting". Also the right choice for extracting the substantive content from a PDF for OCR post-processing or text-analysis workflows.
Technical comparison of the two formats — useful for deciding which to use, or for confirming what changes during conversion.
| Property | MOBI | TXT |
|---|---|---|
| Full name | Mobipocket eBook | Plain Text |
| Year introduced | 2000 | 1963 |
| Developer / standard body | Mobipocket / Amazon | ANSI / IBM |
| MIME type | application/x-mobipocket-ebook | text/plain |
| File extension | .mobi | .txt |
| Compression | PalmDOC compression | None |
| Color / data depth | N/A | N/A |
| Max dimensions / size | Software-limited | Unlimited |
| Transparency | No | No |
| Animation | No | No |
| Standard / specification | Mobipocket | ASCII / Unicode |
| Best for | Older Kindle devices (replaced by AZW3 then KFX) | Code, raw data, universal compatibility |
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.
Quick answers about compatibility, quality, metadata handling, and the most common reasons to convert MOBI files to TXT.
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