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 |
|---|---|---|
| .TPZ | Kindle Topaz eBook File | 4.6 |
| .MART | MartView eBook File | 4.5 |
| .EWRITER | eWriter Book | 4.4 |
| .APNX | Amazon Page Number Index File | 4.2 |
| .EA | Kindle End Actions File | 4.1 |
| .TK3 | TK3 Multimedia eBook | 4.0 |
| .JWPUB | Jehovah's Witnesses Publication | 4.0 |
| .LRF | Sony Portable Reader File | 3.9 |
| .IBOOKS | Multi-Touch iBook | 3.9 |
| .AEP | Activ E-Book Project | 3.9 |
| .MOBI | Mobipocket eBook | 3.9 |
| .DNL | DNAML eBook | 3.8 |
| .TR | TomeRaider 2 eBook File | 3.8 |
| .NCX | EPUB Navigation Control XML File | 3.8 |
| .AZW3 | Amazon KF8 eBook File | 3.8 |
| .FB2 | FictionBook 2.0 File | 3.7 |
| .OPF | FlipViewer FlipBook File | 3.7 |
| .LRS | Librie Reader Source File | 3.7 |
| .RZS | Red Zion Security File | 3.7 |
| .LIT | eBook File | 3.6 |
| .AZW4 | Amazon Print Replica eBook | 3.6 |
| .RZB | Red Zion Book File | 3.6 |
| .CEB | Apabi eBook File | 3.6 |
| .YBK | YanCEyWare eBook | 3.6 |
| .HAN | Amazon Kindle eBook Data File | 3.6 |
| .EPUB | EPUB eBook | 3.5 |
| .PHL | Kindle Popular Highlights File | 3.5 |
| .EBK | eBook Pro eBook File | 3.5 |
| .HTZ5 | HyperMaker 5 Publication | 3.5 |
| .WEBZ | WEBZ Compressed eBook File | 3.5 |
| .PRC | Mobipocket eBook File | 3.5 |
| .OPF | Open Packaging Format File | 3.5 |
| .NVA | NVA Document | 3.5 |
| .MBP | Mobipocket Notes File | 3.5 |
| .CBC | Comic Book Collection | 3.4 |
| .KFX | Amazon KF10 eBook File | 3.3 |
| .LRX | Sony Portable Reader File | 3.3 |
| .AZW | Amazon Kindle eBook File | 3.3 |
| .ACSM | Adobe Content Server Message | 3.3 |
| .TCR | Psion Series 3 eBook File | 3.3 |
| .ORB | Original eBook Reader File | 3.0 |
| .EDN | Adobe eBook Activation File | 3.0 |
| .HTZ4 | HyperMaker 4 Publication | 3.0 |
| .OPZ | Zipped FlipViewer FlipBook | 3.0 |
| .CEBX | Apabi XML eBook File | 3.0 |
| .TR3 | TomeRaider eBook File | 3.0 |
| .AVA | AvaaBook eBook | 3.0 |
| .HTXT | Hanvon eBook File | 3.0 |
| .OEB | Open eBook File | 3.0 |
| .SNB | Shanda Bambook eBook | 2.9 |
| .ETD | Adobe Reader EBX Transfer Data File | 2.8 |
| .HTML0 | Book Designer File | 2.8 |
| .EAL | Kindle End Actions File | 2.8 |
| .AZW1 | Amazon Topaz eBook | 2.7 |
| .PMLZ | Zipped Palm Markup Language File | 2.7 |
| .POBI | Kindle Touch Periodical File | 2.7 |
| .HTMLZ | Zipped HTML eBook | 2.5 |
| .KOOB | Koob E-Book File | 2.3 |
| .BPNUEB | PNU eBook File | 2.0 |
| .PEF | PEF Braille Book File | 2.0 |
| .QMK | YanCEyDesktop Quickmarks File | 2.0 |
| .VBK | VitalSource eBook | 2.0 |
| .OEBZIP | Zipped Open eBook File | 2.0 |
| .FKB | Flipkart eBook File | 1.8 |
| .BKK | BookBuddi eBook | 1.5 |
| .PML | Palm Markup Language File | 1.3 |