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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42
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15answers
25k 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
6k 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 ...
6
votes
3answers
6k views

Automatically hide files with certain extension in Windows

Is it possible for Windows to automatically hide files with a certain extension? Let's say some program generates a set of files (I cant alter the sources of the program), and I would like some of ...
66
votes
10answers
233k 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" ...
4
votes
2answers
2k views

Rename file in XP, only select file name, but show file extension

So if I have a file called: test.txt and I want to rename it, there are two options (depending on the Show already known file extension option): 1) ON: it selects everything (test.txt), meaning I ...
0
votes
2answers
23 views

Command to list all apps capable of opening a given extension

I'm building a file catalogue app of sorts, and for one of its uses I'd like to get a list of all apps currently installed capable of opening files with the extension of the currently selected file. ...
1
vote
1answer
29 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 ...
93
votes
8answers
25k views

File extension for Markdown files?

Is there an official file extension for standalone Markdown files?
1
vote
1answer
72 views

How to search for C# source code files in Windows File Explorer?

I'm trying to find some lost C# source code files on an old external drive. I believe the file extension for C# source files is .cs. When I enter in the search file *.cs and begin searching, I find ...
3
votes
1answer
8k views

Many Personal Files turned into .micro files

Yesterday, I shut down my computer and went to sleep. I woke up today, went to school, came back and now when I turn it on, it shows this .TXT file. Many of my files have turned into .micro files, and ...
6
votes
1answer
4k views

Is there a difference between .JPG and .jpg?

Files that have uppercase extensions (specifically .JPG) are not opening or being recognized in Windows Live Photo Gallery. .jpg files work as expected. What could be causing this issue?
1
vote
2answers
81 views

Default save extension in my Notepad++ is Normal text but Notepad++ is saving without an extension

When I try to save a file, the default extension is All types (* . *). It basically saves it without an extension, for example just new 1 instead of new 1.txt Default language option in Settings -> ...
1
vote
1answer
273 views

Saving .mp4 audio file as an mp3 file [closed]

If you were to save a .jpeg image as an .png image by simply changing the file extension, the image will successfully convert itself. Is there a way similar to this where I can save an .mp4 audio ...
0
votes
0answers
37 views

Group files by extension in Nemo/Nautilus

In Windows Explorer, if you click the Type column, it groups files by file extension. Unfortunately, I can't find any way to get this behavior in Linux Mint. Clicking on the Type column in Nemo just ...
1
vote
2answers
59 views

How can I detect if the extension of a file has been modified?

For example I have picture1.JPG then another user of my computer change the extension from picture1.JPG to picture1.PNG, I am sure that in most cases it will work. My question is this, is there a way ...
12
votes
3answers
3k views

On Windows, what filename extensions denote an executable?

On Windows, *.exe, *.bat, *.cmd, and *.com all represent programs or shell scripts that can be run, simply by double-clicking them. Are there any other filename extensions that indicate a file is ...
10
votes
1answer
2k views

osx - stop xcode from opening ruby files

I have set my favorite text editor as the default application to open ruby files (.rb extension) multiple times by following Open With -> then Other... then I click the checkbox Always Open With. ...
15
votes
3answers
7k views

How to extract a complete list of extension types within a directory?

Within a directory, and recursively within it's sub-directories, meaning every directory within a directory is processed, how do I compile a complete list of unique extensions within the directory? ...
0
votes
1answer
2k views

OS X El Capitan - Issues with OpenVPN and the .ovpn file extension

I'd like to set up an OpenVPN connection, but it just doesn't want to work. .ovpn files seem to be treated in a very special and odd way by OS X: When downloading .ovpn files, they're automatically ...
0
votes
1answer
513 views

Why should one prefer lower case file extensions like .jpg over uppercase ones like .JPG?

Many (most?) programs note file extensions in lower case. ls command in bash even prints foo.jpg highlighted as picture by default but not *.JPG. Lower case characters are better to distinguish from ...
1
vote
3answers
71 views

Bash command for finding file extensions with largest size

I am trying to find file extensions with sorted by size in a directory and sub directory. Something like this: 76K .pek ./Adobe Premiere Pro Preview ...
5
votes
2answers
275 views

Remove Suggested Programs for Unknown File Extensions

I regularly introduce all kinds of new, obscure file extensions to my system. For this explanation, I do not have any association with .xyz files. Say I create file.xyz. It has the default dog-eared ...
0
votes
0answers
46 views

Sublime Text 3 Missing Extensions

I started using sublime text v3 and I'm having problems with some extensions. When I look for php/js/css/html extensions, they aren't listed in the extensions list. I reinstalled the program and ...
2
votes
3answers
946 views

Windows wildcards with files having more than 3 characters extensions

On Windows 7, I have a directory containing the following four files: xxx.txt xxx.txt2 xxx2.txt xxx2.txt2 With the file have more than 3 character as a file extension, the behavior of the wildcard ...
0
votes
1answer
32 views

How to open a .htmlENX file

I have found some .htmlENX files on my computer and I know that these are encrypted files using the Egis program. That's all I've been able to determine from the file name. These files are just chat ...
0
votes
0answers
32 views

How to open .exj file extension

I need to open .exj file extension. I googled and found it's associated with Java. But how do I open it to view and edit the contents of the file? One thing I am aware, it has question and answers in ...
3
votes
3answers
4k views

Way to search & find Files or Folders with no Extension in Windows

How do i search files with no extension? For best effect i would like only <4kb and if i could search inside for the text thewordiwant I also have visual studios but i dont think writing ...
2
votes
1answer
204 views

Corrupted document files with a strange extension

Today I turned no my PC and I faced an strange problem. Most of my documents and files such as .jpg, .pptx, .docx, .pdf where renamed with for example "xxxxxx.JPG.dslttdk" and "xxxx.PDF.dslttdk" and ...
6
votes
3answers
3k views

Searching for Extensionless Files in Windows 7

I cannot for the life of me figure out a way to have Windows 7 Explorer search for files with no extension. In XP it was nice and simple: just search for files named *. but in 7, that does not work ...
0
votes
1answer
32 views

What are TQS, TQI and the TQP file extensions, and how can I open them?

I'm using some old software on windows that looks like it accesses a database to serve up some questions. I'd like be able to access the database, but when I go into the data directory there are 3 ...
0
votes
0answers
26 views

Odd Appearances in HKEY_CLASSES_ROOT\

I am familiar with HKEY_CLASSES_ROOT\ and aware of how it works. What I am unable to understand is how some items arrived here. Was wondering if someone knew of an anterior method or how in the world ...
1
vote
2answers
4k 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 ...
1
vote
1answer
683 views

Make the extension .fw.png open in a different program to .png?

I want files ending in .fw.png to open in Adobe Fireworks but I want regular .png files to open in my standard image viewer program. Is this possible?
1
vote
1answer
321 views

Is there any way to restrict user from changing file extensions in Windows XP, Vista, Windows 7?

For example, not allow users to rename abc.doc to abc.jpg? Is there any windows group policy for that?
-1
votes
2answers
73 views

Opera doesn't let me change default browser for html pages

Basically, title says it all. I have to move from Opera browser to Mozilla Firefox, but I'm unable to switch default application for html and htm pages. When I do this from standard file dialog, the ...
0
votes
2answers
1k 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
0
votes
0answers
63 views

How to open a WMP file?

I have some old photos in WMP files. I have tried the suggestions from here: http://fileinfo.com/extension/wmp But none of them worked. Is there any way to open them at Windows 8.1? EDIT: I have ...
0
votes
3answers
282 views

How can I unassociate a file type from a program without a registry edit?

I accidentally configured .data and .text files to be opened with Notepad by default. I want to unlink those extensions from being opened by Notepad. However, Notepad does not appear in the list of ...
-1
votes
1answer
67 views

How accurate is content sniffing in order to determine filetype?

I need to identify the mime-type of extensionless files(document fileformats such as PDF, doc, docx etc), and I am wondering how accurate known file-signatures are? What I will do is to create a map ...
17
votes
4answers
18k views

Find files filtered by multiple extensions

What is the correct syntax for: find . -type f -name \*.\(shtml\|css\) This works, but is inelegant: find . -type f -name \*.shtml > f.txt && find . -type f -name \*.css >> f.txt ...
1
vote
1answer
295 views

7zip Batch Compression for a specific file extension in different folders

I've already learn how to batch compress my files as-is with 7zip but I have something more complex need on this issue. Maybe I can explain my needs with this scenario; I have a backup folder of my ...
0
votes
2answers
44 views

making it so i'm always prompted for which program to use when opening files with certain extensions

I opened up a *.php file with Notepad in Windows 8.1 and now it's wanting to open every *.php file with Notepad. I can change the program it opens *.php files up with but I don't want it to always ...
0
votes
1answer
105 views

Always show file extension for screenshots

If you take a screenshot with ⌘+⇧+4 the file is saved as a .png to the desktop, but the extension is hidden. You need to open the Info dialog and untick "Hide extension" if you want to show the ...
1
vote
2answers
6k 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 ...
17
votes
2answers
19k views

Programatically associate file extensions with application on Windows

I've just recently reinstalled Windows and in setting up my environment I've noticed that all my associations for the various programming languages I edit in Notepad++ have gone (naturally). I am ...
0
votes
3answers
10k views

File extension for file to be run by terminal?

If I want a series of commands to be run by terminal, instead of writing it in a text file and copying and pasting it in there, could I have terminal run it? If so, what does the extension have to be? ...
0
votes
2answers
136 views

Does windows change files when file extensions are changed?

I have noticed that changing the file extension from one to another and back to the old one will make the file unusable. Why is it so ? Does changing the extension change the file contents ? Also, ...
0
votes
1answer
29 views

how to convert .to files to a popular audio format

I have received an audio file with extension .To from a friend. I have found a player for this file type, but I want to convert it to a popular audio format in order to play it in my other gadgets. I ...
1
vote
1answer
171 views

Change file extension in Windows 7 without making extensions visible in Explorer options

Occasionally I want to change the extension for a given file in Windows Explorer, e.g. rename audio_only.mp4 to audio_only.m4a. These valid possibilities are somehow unappealing: Show extensions in ...
0
votes
1answer
54 views

Finding files by only knowing extension?

I'm somewhat disorganized in my file saving habits, so I wind up using the Search function in Windows Explorer more often than one should. I was wondering, is it possible to have Windows find all ...