File extensions in alphabetical order #A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Most popular overall

#	File extension	Developer
1	.PKPASS - Apple Passbook Pass Format	Apple
2	.CRYPT - WhatsApp Messenger Encrypted Message Database Backup	WhatsApp Inc.
3	.NM7 - Navitel Navigator Map	GPS Moldova
4	.NOMEDIA - Google Android OS System Format	N/A
5	.THUMBDATA3--1967290299 - Android Thumbnail Index	Google Inc.
6	.THUMBDATA - Google Android Thumbnail Database	Google Inc.
7	.THUMBDATA3--1763508120 - Android Thumbnail Index	Google Inc.
8	.M - Objective-C Language Source Format	Apple
9	.W - OpenEdge Architect Source Code Format	Progress Software
10	.JKS - Jedi Knight Save	LucasArts Entertainment Company, LLC
11	.XSB - XACT Sound Bank	Microsoft
12	.P7E - SecureSoft Encrypted	N/A
13	.AV - Final Draft AV Document	Final Draft, Inc.
14	.LBF - Bioshock 2 Configuration	2K Games
15	.EML - Email Message Format	Microsoft
16	.ROFL - Leagues Of Legends Replay	Riot Games Inc.
17	.OPUS - Opus Audio Format	Xiph.Org
18	.SPL7 - SPlan Data	ABACOM
19	.THUMBDATA3 - Google Android Thumbnail Database	Google Inc.
20	.THUMBDATA5--1967290299_0 - Android Thumbnail Index	Google Inc.
21	.STRG - E-Viewer Recorded Video Copy Backup	AAT Holding sp. z o.o.
22	.KSD - Absynth Kore Patch Format	Native Instruments, Inc.
23	.RVF - RichView Document	Sergey Tkachenko
24	.MEGA - Megacubo Metafile	Megacubo
25	.ICS - ICalendar Calendar File Format (Microsoft Outlook, Apple ICal)	N/A
26	.AEE - ASUS Data Security Manager Encoded	ASUSTeK Computer Inc.
27	.CETRAINER - DBVM	N/A
28	.VSDX - Microsoft Visio 2013 Drawing Format	Microsoft
29	.SOR - Corel Paradox Sort Definition	Corel Corporation
30	.SNB - Shanda Bambook EBook	N/A
31	.NMM - Microsoft 3D Movie Maker Video	Microsoft Corporation
32	.RGSS3A - RPG Maker VX RGSS Version 3 Encrypted Archive	Enterbrain, Inc.
33	.ACSM - Adobe Content Server Message Format	Adobe Systems
34	.DC6 - Diablo 2 Static Image	Blizzard Entertainment, Inc.
35	._PLAYMUSICID - Android Google Play Music Id	Google Inc.
36	.LCX - LC Model	Cray Inc.
37	.DGR - DeltaGraph Document	RockWare, Inc.
38	.DC5 - DataCAD Drawing Format	DATACAD LLC.
39	.BDOC - DigiDoc Client Container	SK.ee
40	.CUSTOMDESTINATIONS-MS - Microsoft Windows 7 Jump List	Microsoft Corporation
41	.ECBK - LG PC Suite Calendar Backup	LG Electronics
42	.MBZ - Pogoshell NES Emulator Plugin	N/A
43	.MUSX - Min‐U‐Script Xpress Transcript Data	Moretti & Murphy Reporting
44	.APK - Google Android Package Format	Google
45	.PART - Partial Download Format	N/A
46	.EDDX - Edraw Project	EDrawSoft
47	.M4S - Myst IV: Revelation Save Game	Ubisoft Entertainment S.A.
48	.TFS - Turbo Profiler Statistical Information	Borland Software Corporation
49	.THUMBDATA5--1763508120_0 - Android Thumbnail Index	Google Inc.
50	.ASP - Active Server Page Script Page	Microsoft