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eBook File Types

eBook files are digital books designed to be viewed on eReaders, such as the Amazon Kindle, Sony Reader, Barnes and Noble Nook, and the iPad. However, they can often be viewed on a PC using eReader software as well. While many eBook formats can be viewed on multiple devices, some proprietary eBook formats can only be viewed using specific hardware or software.

Common eBook file extensions include .EPUB, .AZW, and .LIT.

Extension File Description Popularity Rating
.azwAmazon Kindle eBook File4 stars3.75
.epubOpen eBook File3.5 stars3.6698
.ibooksMulti-Touch iBook4 stars3.8333
.mobiMobipocket eBook4 stars3.8214
.acsmAdobe Content Server Message File3.5 stars3.6667
.azw1Amazon Topaz eBook2.5 stars2.5
.azw3Amazon KF8 eBook File4 stars3.9
.azw4Amazon Print Replica eBook3.5 stars3.3333
.fb2FictionBook 2.0 File4 stars3.913
.liteBook File3 stars3.2
.lrfSony Portable Reader File3 stars3
.prcMobipocket eBook File3.5 stars3.6842
.tpzKindle Topaz eBook File4 stars4
.apnxAmazon Page Number Index File4 stars4
.bkkBookBuddi eBook File3 stars3
.cebApabi eBook File3.5 stars3.6
.dnlDNAML eBook File4 stars4
.ebkeBook Pro eBook File3 stars3
.etdAdobe Reader EBX Transfer Data File3 stars3
.fkbFlipkart eBook File3 stars3
.htmlzZipped HTML eBook2.5 stars2.5
.lrsLibrie Reader Source File3 stars3
.lrxSony Portable Reader File3 stars3
.martMartView eBook File3 stars3
.mbpMobipocket Notes File3.5 stars3.3333
.ncxEPUB Navigation Control XML File4 stars4
.opfOpen Packaging Format File3.5 stars3.5714
.phlKindle Popular Highlights File3.5 stars3.5
.rzbRed Zion Book File3 stars3
.rzsRed Zion Security File3 stars3
.tcrPsion Series 3 eBook File3 stars3
.tk3TK3 Multimedia eBook3 stars3
.tr3TomeRaider eBook File3 stars3
.vbkVitalSource eBook3 stars3
.ybkYanCEyWare eBook3 stars3
.aepActiv E-Book Project2 stars2
.bpnuebPNU eBook File2 stars2
.cbcComic Book Collection3.5 stars3.5
.eaKindle End Actions File2 stars2
.ealKindle End Actions File2 stars2
.ednAdobe eBook Activation File2 stars2
.html0Book Designer File2 stars2
.htxtHanvon eBook File2 stars2
.htz5HyperMaker 5 Publication2 stars2
.nvaNVA Document3.5 stars3.5
.oebOpen eBook File2 stars2
.oebzipZipped Open eBook File2 stars2
.pefPEF Braille Book File2 stars2
.pmlPalm Markup Language File1.5 stars1.5
.pmlzZipped Palm Markup Language File2 stars2
.pobiKindle Touch Periodical File2 stars2
.qmkYanCEyDesktop Quickmarks File 2 stars2
.trTomeRaider 2 eBook File2.5 stars2.6667
.webzWEBZ Compressed eBook File2 stars2
.avaAvaaBook eBook1 star1
.htz4HyperMaker 4 Publication1 star1
.koobKoob E-Book File1 star1
.snbShanda Bambook eBook1.5 stars1.5