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 | 140 |
| .MART | MartView eBook File | 167 |
| .APNX | Amazon Page Number Index File | 176 |
| .LRF | Sony Portable Reader File | 186 |
| .EA | Kindle End Actions File | 200 |
| .TK3 | TK3 Multimedia eBook | 200 |
| .LRS | Librie Reader Source File | 200 |
| .MOBI | Mobipocket eBook | 207 |
| .TR | TomeRaider 2 eBook File | 210 |
| .IBOOKS | Multi-Touch iBook | 211 |
| .AEP | Activ E-Book Project | 214 |
| .AZW3 | Amazon KF8 eBook File | 215 |
| .DNL | DNAML eBook File | 220 |
| .JWPUB | Jehovah's Witnesses Publication File | 224 |
| .FB2 | FictionBook 2.0 File | 225 |
| .AZW4 | Amazon Print Replica eBook | 225 |
| .EBK | eBook Pro eBook File | 231 |
| .RZS | Red Zion Security File | 233 |
| .KFX | Amazon KF10 eBook File | 237 |
| .EPUB | Open eBook File | 239 |
| .AZW | Amazon Kindle eBook File | 244 |
| .NCX | EPUB Navigation Control XML File | 244 |
| .LIT | eBook File | 246 |
| .CEB | Apabi eBook File | 250 |
| .HTZ5 | HyperMaker 5 Publication | 250 |
| .MBP | Mobipocket Notes File | 250 |
| .RZB | Red Zion Book File | 250 |
| .PRC | Mobipocket eBook File | 250 |
| .WEBZ | WEBZ Compressed eBook File | 250 |
| .CBC | Comic Book Collection | 257 |
| .YBK | YanCEyWare eBook | 260 |
| .NVA | NVA Document | 260 |
| .OPF | Open Packaging Format File | 264 |
| .HAN | Amazon Kindle eBook Data File | 267 |
| .LRX | Sony Portable Reader File | 267 |
| .ACSM | Adobe Content Server Message File | 273 |
| .PHL | Kindle Popular Highlights File | 283 |
| .HTZ4 | HyperMaker 4 Publication | 300 |
| .SNB | Shanda Bambook eBook | 300 |
| .BKK | BookBuddi eBook File | 300 |
| .CEBX | Apabi XML eBook File | 300 |
| .AVA | AvaaBook eBook | 300 |
| .OEB | Open eBook File | 300 |
| .ORB | Original eBook Reader File | 300 |
| .EDN | Adobe eBook Activation File | 300 |
| .TR3 | TomeRaider eBook File | 300 |
| .ETD | Adobe Reader EBX Transfer Data File | 317 |
| .EAL | Kindle End Actions File | 325 |
| .POBI | Kindle Touch Periodical File | 333 |
| .TCR | Psion Series 3 eBook File | 333 |
| .AZW1 | Amazon Topaz eBook | 333 |
| .HTML0 | Book Designer File | 345 |
| .HTXT | Hanvon eBook File | 350 |
| .KOOB | Koob E-Book File | 367 |
| .HTMLZ | Zipped HTML eBook | 369 |
| .BPNUEB | PNU eBook File | 400 |
| .QMK | YanCEyDesktop Quickmarks File | 400 |
| .PEF | PEF Braille Book File | 400 |
| .OEBZIP | Zipped Open eBook File | 400 |
| .PMLZ | Zipped Palm Markup Language File | 400 |
| .FKB | Flipkart eBook File | 425 |
| .VBK | VitalSource eBook | 440 |
| .PML | Palm Markup Language File | 450 |