eBook Files
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 Type | Popularity |
|---|---|---|
| .APNX | Amazon Page Number Index File | 4.2 |
| .TPZ | Kindle Topaz eBook File | 4.0 |
| .TK3 | TK3 Multimedia eBook | 4.0 |
| .JWPUB | Jehovah's Witnesses Publication | 4.0 |
| .IBOOKS | Multi-Touch iBook | 3.9 |
| .AEP | Activ E-Book Project | 3.9 |
| .MOBI | Mobipocket eBook | 3.9 |
| .DNL | DNAML eBook | 3.8 |
| .EWRITER | eWriter Book | 3.8 |
| .NCX | EPUB Navigation Control XML File | 3.8 |
| .MART | MartView eBook File | 3.8 |
| .AZW3 | Amazon KF8 eBook File | 3.8 |
| .EA | Kindle End Actions File | 3.8 |
| .YBK | YanCEyWare eBook | 3.8 |
| .FB2 | FictionBook 2.0 File | 3.7 |
| .LRF | Sony Portable Reader File | 3.7 |
| .RZS | Red Zion Security File | 3.7 |
| .LRS | Librie Reader Source File | 3.7 |
| .TR | TomeRaider 2 eBook File | 3.6 |
| .RZB | Red Zion Book File | 3.6 |
| .CEB | Apabi eBook File | 3.6 |
| .OPF | FlipViewer FlipBook File | 3.6 |
| .LIT | eBook File | 3.6 |
| .EPUB | EPUB eBook | 3.5 |
| .PRC | Mobipocket eBook File | 3.5 |
| .PHL | Kindle Popular Highlights File | 3.5 |
| .OPF | Open Packaging Format File | 3.5 |
| .HTZ5 | HyperMaker 5 Publication | 3.5 |
| .WEBZ | WEBZ Compressed eBook File | 3.5 |
| .MBP | Mobipocket Notes File | 3.5 |
| .HAN | Amazon Kindle eBook Data File | 3.4 |
| .CBC | Comic Book Collection | 3.4 |
| .EBK | eBook Pro eBook File | 3.4 |
| .KFX | Amazon KF10 eBook File | 3.3 |
| .LRX | Sony Portable Reader File | 3.3 |
| .ACSM | Adobe Content Server Message | 3.3 |
| .TCR | Psion Series 3 eBook File | 3.3 |
| .AZW | Amazon Kindle eBook File | 3.2 |
| .NVA | NVA Document | 3.1 |
| .CEBX | Apabi XML eBook File | 3.0 |
| .OPZ | Zipped FlipViewer FlipBook | 3.0 |
| .TR3 | TomeRaider eBook File | 3.0 |
| .ORB | Original eBook Reader File | 3.0 |
| .HTXT | Hanvon eBook File | 3.0 |
| .EDN | Adobe eBook Activation File | 3.0 |
| .OEB | Open eBook File | 3.0 |
| .HTZ4 | HyperMaker 4 Publication | 3.0 |
| .AVA | AvaaBook eBook | 3.0 |
| .AZW4 | Amazon Print Replica eBook | 2.9 |
| .ETD | Adobe Reader EBX Transfer Data File | 2.8 |
| .SNB | Shanda Bambook eBook | 2.8 |
| .HTML0 | Book Designer File | 2.8 |
| .EAL | Kindle End Actions File | 2.8 |
| .AZW1 | Amazon Topaz eBook | 2.7 |
| .POBI | Kindle Touch Periodical File | 2.7 |
| .PMLZ | Zipped Palm Markup Language File | 2.7 |
| .BKK | BookBuddi eBook | 2.7 |
| .HTMLZ | Zipped HTML eBook | 2.6 |
| .KOOB | Koob E-Book File | 2.3 |
| .FKB | Flipkart eBook File | 2.1 |
| .VBK | VitalSource eBook | 2.0 |
| .OEBZIP | Zipped Open eBook File | 2.0 |
| .PML | Palm Markup Language File | 2.0 |
| .QMK | YanCEyDesktop Quickmarks File | 2.0 |
| .BPNUEB | PNU eBook File | 2.0 |
| .PEF | PEF Braille Book File | 2.0 |