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 |
| .APNX | Amazon Page Number Index File | 4.2 |
| .LRF | Sony Portable Reader File | 4.1 |
| .EA | Kindle End Actions File | 4.1 |
| .TK3 | TK3 Multimedia eBook | 4.0 |
| .JWPUB | Jehovah's Witnesses Publication | 3.9 |
| .MOBI | Mobipocket eBook | 3.9 |
| .IBOOKS | Multi-Touch iBook | 3.9 |
| .AEP | Activ E-Book Project | 3.9 |
| .AZW3 | Amazon KF8 eBook File | 3.9 |
| .TR | TomeRaider 2 eBook File | 3.8 |
| .DNL | DNAML eBook File | 3.8 |
| .AZW4 | Amazon Print Replica eBook | 3.8 |
| .FB2 | FictionBook 2.0 File | 3.7 |
| .OPF | FlipViewer FlipBook File | 3.7 |
| .NCX | EPUB Navigation Control XML File | 3.7 |
| .RZS | Red Zion Security File | 3.7 |
| .LRS | Librie Reader Source File | 3.7 |
| .YBK | YanCEyWare eBook | 3.7 |
| .RZB | Red Zion Book File | 3.6 |
| .EBK | eBook Pro eBook File | 3.6 |
| .HAN | Amazon Kindle eBook Data File | 3.6 |
| .EPUB | Open eBook File | 3.6 |
| .LIT | eBook File | 3.6 |
| .HTZ5 | HyperMaker 5 Publication | 3.5 |
| .OPF | Open Packaging Format File | 3.5 |
| .MBP | Mobipocket Notes File | 3.5 |
| .PRC | Mobipocket eBook File | 3.5 |
| .WEBZ | WEBZ Compressed eBook File | 3.5 |
| .NVA | NVA Document | 3.5 |
| .AZW | Amazon Kindle eBook File | 3.5 |
| .CEB | Apabi eBook File | 3.5 |
| .KFX | Amazon KF10 eBook File | 3.4 |
| .CBC | Comic Book Collection | 3.4 |
| .LRX | Sony Portable Reader File | 3.3 |
| .PHL | Kindle Popular Highlights File | 3.3 |
| .ACSM | Adobe Content Server Message | 3.3 |
| .BKK | BookBuddi eBook File | 3.0 |
| .EDN | Adobe eBook Activation File | 3.0 |
| .OEB | Open eBook File | 3.0 |
| .ORB | Original eBook Reader File | 3.0 |
| .AVA | AvaaBook eBook | 3.0 |
| .OPZ | Zipped FlipViewer FlipBook | 3.0 |
| .HTZ4 | HyperMaker 4 Publication | 3.0 |
| .HTXT | Hanvon eBook File | 3.0 |
| .TR3 | TomeRaider eBook File | 3.0 |
| .CEBX | Apabi XML 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 |
| .TCR | Psion Series 3 eBook File | 2.7 |
| .POBI | Kindle Touch Periodical File | 2.7 |
| .AZW1 | Amazon Topaz eBook | 2.7 |
| .HTMLZ | Zipped HTML eBook | 2.4 |
| .KOOB | Koob E-Book File | 2.3 |
| .PEF | PEF Braille Book File | 2.0 |
| .BPNUEB | PNU eBook File | 2.0 |
| .QMK | YanCEyDesktop Quickmarks File | 2.0 |
| .OEBZIP | Zipped Open eBook File | 2.0 |
| .FKB | Flipkart eBook File | 1.8 |
| .VBK | VitalSource eBook | 1.6 |
| .PML | Palm Markup Language File | 1.5 |
| .PMLZ | Zipped Palm Markup Language File | 1.5 |