A file extension is an optional alphanumeric identifier which comes after the last found period in a file name. A file extension itself does not define what type of data is in a file, but it does give a hint as to what is *supposed* to be in the file.

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2
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1answer
29 views

Windows - don't hide file extensions of certain types

I want to hide all file extensions except for certain extensions/types. Is this possible? I don't like the clutter of file extensions but as a developer I find it helpful to know the extensions of ...
0
votes
2answers
23 views

moving a file based on its extension in BATCH

I am making a batch script to move files based on their extension, so for example: video.avi would go to Videos text.txt would go to text files I am using the drag and drop technique of getting the ...
0
votes
1answer
15 views

Add context menu items to specific file extensions

I think the title says all I want: I want to add context menu items for a specific file type like the yellow marked ones in the screenshot. Which registry changes do I have to make? In my case I want ...
1
vote
5answers
6k views

how do you make and run your own file extension?

I was checking out the files in a old game called Warcraft 3 and saw that they had files with their own extension for example file name.w3x so, how do you make your own file extension and run it?
0
votes
2answers
257 views

Add items to the “Open with” list in Windows 8

When I look at files in the Windows-8.1 file explorer, I can right-click a file and select "Open With" to choose a program that allows me to open that file. For instance: when I select a PDF file, I ...
0
votes
1answer
129 views

Windows 8.1 won't start a file extension using a .jar file, eventhough it's possible in windows 7

Here is a picture of the file i want to open, and the program i want to open it with. If i just click the jar file, it opens my program smoothly (I made that java progrma my self), no questions ...
0
votes
1answer
200 views

How to set the default program without the program's icon for an extension

This might not be the best place to ask, but how can I set the default program for an extension while using a custom icon handler from a dll? I used this tool to show an apk's icon in explorer. I also ...
0
votes
1answer
44 views

How to extract the filename without the extension from a full path?

I'm trying to right my first bash script, and at one point a filename is passed to the script as $1. I need to extract the file name without the extension. Currently, I'm assuming that all extensions ...
3
votes
3answers
2k views

How to change the extension of all selected files at once?

Its possible to rename files all at once. But its not possible to change the extension of selected files all at once. If windows doesn't support this facility .. then is there any batch script or ...
1
vote
1answer
46 views

What are the default programs to open docx, PDF and ZIP files on OS X?

I'm writing an article about DOCX, PDF and ZIP extensions. But first, I need to know the programs which are used to open these extension as default (without any third-party applications). I don't ...
35
votes
7answers
104k views

How do you remove a default program association for file types in Windows 7?

I somehow have set the default file type association for a file type in Windows 7. It doesn't appear to be possible to delete it from the "Change the file type associated with a file extension" ...
0
votes
1answer
54 views

Intellij 12+: is there a way to set default code style?

I work with a lot of javascript files that are not suffixed by ".js", so Intellij renders no code style at all (no coloration or auto-complete) unless I put <script> tags around the code (which ...
0
votes
1answer
40 views

How to associate a file extension to be opened with a batch script?

I want to get rid of OSPPSVC (Office Software Protection Platform Service). Then, I have replaced the links to open Office programs with a link to launcher.bat: @echo off title Launching Office... ...
0
votes
2answers
644 views

How to open .BNDL files

I want to edit a .BNDL file in windows 7 but when I open it with notepad or Microsoft Office 2010, I get a file with weird characters. Is there a way to edit this file in windows? Regards
2
votes
2answers
5k views

How to open .bok file extension

I need to open .bok file but can't find a freely available tool to open it. I have tried freeFileViewer but it is displaying the file in HEX code. What tool do i need to use ?
5
votes
2answers
175 views

How can I associate multiple context menu types for one file extension in the registry?

I want to add custom context menu options for certain file extensions (like .zip-files) for a program I'm developing. However on many (but not all) PCs my software is going to be installed on 7-Zip is ...
1
vote
3answers
2k views

reset file associations to default (idx opens w/ winRar)

Does anyone know how to set file associations back to default on windows 8. Currently the file extention "idx" is opening with "winRar" & i want to reset it back to "unknown program".
3
votes
0answers
4k views

Search content of files with unknown extension

I have the problem that Windows Server 2008 does not seem to search through the content of files with a unknown extension (csv). How can I change this? I had already installed the indexing service ...
2
votes
1answer
36 views

What is the file name + extension for a file with a period as the first character (example: .txt)?

I'm trying to find an authoritative answer on this matter, but it's difficult. Wikipedia kind of dances around the issue but isn't explicit enough. For .txt (to use an example), is the base name ...
1
vote
0answers
22 views

Linux - How to change default application for text files with custom extensions?

I do some creative writing and use PyRoom for most of my drafts. I want to save my drafts with a custom extension story(i.e. Persuasion.story) and associate story extension to PyRoom. I want to, ...
1
vote
5answers
16k views

Excel 2010 File Format/Extension Not Valid. Unable to Manually Change File Extension

I am at work and having problems opening an excel file. I continue to get the error: Excel cannot open the file XXX.xlsx" because the file format or file extension is not valid. Verify that the ...
5
votes
6answers
29k views

How to open nokia photo images with .nrw extension?

I took some photos with my Nokia and they stayed with the .nrw extension. How can I open this format?
70
votes
7answers
15k views

File extension for Markdown files?

Is there an official file extension for standalone Markdown files?
0
votes
1answer
17 views

Is there any kind of file that can hold calendar information (appointments or so)?

I am looking for a type of file that can hold calendar information (such as appointments) and when opened by a calendar application (such as outlook or similar apps) either on desktop or mobile it ...
0
votes
0answers
59 views

Double extensions and FLV thumbnails not appearing

I'm using Windows 7 and have recently used Icaros successfully to get all thumbnails to appear. I did a clean reinstall a few weeks ago and have since not been able to get .flv thumbnails to appear by ...
0
votes
0answers
660 views

Virus changed some folders and files' extensions to .exe

A virus changed all folders and some of files on my USB flash drive to .exe files. I scanned the flash drive with USB Disk Security and scanned my computer with Microsoft Security Essentials, deleting ...
0
votes
0answers
29 views

Zim viewer browser extension

I spend several hours on Wikipedia every week and I love their little software called Kiwix that allows me to see their content offline, especially because my ISP sucks. The only possible way for me ...
1
vote
1answer
406 views

What file extensions does ffmpeg support?

I'm trying to extract a subtitle from a Blu-ray disc and it is an hdmv_pgs_subtitle. So I try ffmpeg -i file.m2ts -map 0:3 -scodec copy rip3/test.sub and get Could not write header for output ...
0
votes
1answer
253 views

How do I add file types to Windows 8 “File Associations”?

I am trying to associate .scss files with my text editor, but the file extension is not listed under Control Panel > Programs > Default Programs > Set Associations How can I set this ...
2
votes
3answers
9k views

Open .cdr file on OS X

I need to open a couple of .cdr files on my Mac. I've tried changing the file extension to .iso in order to open it with the Disk Utility app, but it didn't work! Any ideas how I can open them?
3
votes
4answers
7k views

Input Error: There is no script engine for file extension “.vbs”

I keep getting it in command prompt, any idea why and how I may resolve the issue? Windows 7 Ultimate 32-Bit
2
votes
1answer
192 views

Custom Windows Configuration Batch File

I'd like to configure myself a one-click configuration windows script. However, I really don't know where to search for the lines to edit in the registry. I've found some things (such as UAC ...
2
votes
1answer
1k views

Is there a way to show only specific file extensions?

Call me crazy, but I'm sure I remember this capability existing in previous versions of Windows. In Windows 7, we can have file extensions Off... or On. Pick one. Is there some obscure switch ...
0
votes
1answer
66 views

Video - How to open .a Video format?

I downloaded several files from Video-Sharing websites (Like YouTube and others) with IDM which is downloaded Completely. But the Extension of these videos are .a. I Changed extension to .webm, then i ...
0
votes
1answer
120 views

Default file extension for picture downloads on Chrome?

My google chrome will only save pictures as KanKan (then there's some Chinese: 图秀 or something) How do I get it back to .jpeg as a default? (the drop-down menu only says "all files")
6
votes
3answers
986 views

What in the world is a .el8 file?

I am taking an online Latin class, and they gave me a video to watch. A .el8. What? el8? I have never heard of that in my life. It's supposed to be a video, so I tried renaming it to a .mov (Latin ...
0
votes
2answers
265 views

Remove a file extension case-insentively in Bash

I want to remove the suffix of a file by using basename in a Bash script. The command removes the suffix only in a case-sensitive way though. How can I remove a extension case-insensitively?
0
votes
1answer
168 views

How to make Internet Explorer not open extensions

So, I had been using Notepad++ to open many be files - say, .txt, or .log, for example. And that is how I like it. One day, though, internet explorer suddenly started opening them, which I most ...
37
votes
13answers
7k views

Does it make sense converting a file to a higher audio bitrate?

When a certain file (mp4, flv, etc) has a 95 kbps audio bitrate - does it make sense outputing to a higher bitrate when converting to mp3 or other format (be it lossy or not)? Would this result in ...
0
votes
1answer
25 views

How to Edit an non-extension Picture?

I have an open source application that i can edit any files on it. Now i want to edit some pictures that have no Extension! (Just the picture name can shown). and when i open them with any ...
1
vote
1answer
298 views

Setting default action for new file extension

I wanted to create my own file extension and set two actions possible to do with the file. Here is .reg file I created: Windows Registry Editor Version 5.00 [HKEY_CLASSES_ROOT\.dls\] @="DLSource" ...
1
vote
1answer
86 views

Edit Context Menu of Specific File Extension, and Exclude Entries From the * (All Files) Context Menu

I would like to create an entirely unique context menu for a specific file type. I have added all the items I'd like to add to the context menu, but I don't know how to remove existing ones. I'd ...
0
votes
1answer
105 views

Reading a disk image without extension

I have three files that are supposed to be disks image with a .img extension. However, when I look at their properties, Windows says that it's just a file, without any extension. I tried to manually ...
2
votes
5answers
388 views

Detecting if a .bin file is .atrac (audio)?

I want to detect if .bin files are atrac or not. How is this possible? Is anyone here familiar with the .atrac extension? Would a hex editor help? EDIT: It is to my understanding that .atrac files ...
-4
votes
2answers
1k views

file extension not valid . when it is

I can't open a excel file on my home computer. Every other computer I use opens the file apart from this one I use at home . I get a error message - financial.xlsx format is not valid. This is ...
0
votes
1answer
156 views

How to run a file as executable with a different extension?

After taking a look at the listed processes in Window's TaskManager, I've noticed that there are some process that has a different extension other than .exe. I then opened the folder location of one ...
7
votes
3answers
5k views

What file format/database format does Picasa use?

I am trying to figure out what file format the .db file and .pmp files are. I tried using db_dump (Berkeley DB) for the .db files, but it seems that they are not Berkeley DB, or of an older version. I ...
0
votes
1answer
242 views

How can I configure my mac to open files that have no extension in Sublime Text 2 (or another editor) [duplicate]

I want open ~/.profile to open my .profile file in Sublime Text 2. I know how to do this with .txt files for example, but I can't figure out how to do that with files that don't have an extension.
0
votes
0answers
98 views

Wants to create a Batch file with following conditions

I'm having one great challenge according to create a batch file. Here is my situation I'm having folder full of folders and files(note all the files are in ".apf" extension). I want to create a empty ...
6
votes
4answers
1k views

What does X denotes in ASPX, DOCX, XLSX, PPTX etc?

Previously there were ASP, DOC, XLS, PPT etc and now ASPX, DOCX, XLSX, PPTX respectively. What does X denotes in ASPX, DOCX, XLSX, PPTX etc?