What is a .MOBI file?
MOBI is an e-book format once used by Amazon Kindle. Opened by calibre and older Kindles.
- Did you know
- MOBI came from Mobipocket in 2000; Amazon adopted it for the Kindle, then retired it in 2022.
- The format descends from PalmDOC, the document format of Palm OS handhelds, which is why MOBI books can also carry the .prc extension.
- Amazon’s early Kindle AZW files were essentially Mobipocket books using its high-compression option, the two being near-identical without DRM.
- What Analyser reads
- Identify e-book files: Kindle (MOBI, AZW, AZW3) and DjVu. FictionBook (FB2) now opens in a full reader (see Text & markup above).
- Depth of analysis
- .MOBI is an identification-grade format: Analyser recognises it from its bytes and decodes the header metadata it carries, rather than opening it in a full viewer. Formats that do get a full viewer are marked "Full" on the formats page.
- Open a .MOBI file
- Drag a .MOBI file onto the Analyser home page (or tap to pick one). It is identified entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.
- Related formats
- .AZW · .AZW3 · .DJVU. See all supported file types.