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.

learn more… | top users | synonyms

2
votes
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 ...
0
votes
1answer
128 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
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 ...
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 ...
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
1answer
53 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 ...
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, ...
0
votes
2answers
256 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
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
657 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
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".
1
vote
1answer
405 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
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 ...
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 ...
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
167 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 ...
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
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" ...
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 ...
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 ...
-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 ...
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
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 ...
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 ...
0
votes
2answers
109 views

How do I fix .lnk files on windows vista?

How do I fix .lnk files on windows vista? Sticky Notes and Windows Journal don't seem to work any more (apparently it's anything with a .lnk file extension). I already tried system restore, and even ...
2
votes
1answer
251 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. ...
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")
1
vote
1answer
73 views

In the “open with” dialogue: quotation mark after an extension?

If you go to any "normal" file in windows, right-click on it, you get a menu item called "Open With..." The way it's supposed to work is, you're presented with a pop-up that offers you common ...
1
vote
1answer
23 views

What is the type of files I get when downloading the source code of .NET Framework?

I want to download the source code of .NET Framework 4. From the official website, I get the files with the extension .aspx; WinRAR is pretending that those are broken CAB files, and Windows won't ...
0
votes
1answer
149 views

Open .tdt files in Excel by default

I routinely use Excel for TDT and other formats. I've never had a problem getting Windows to open .tdt files in Excel by default; in Windows 7, it's right-click | Open with | Choose default ...
0
votes
1answer
91 views

Unselect the file type when renaming files in XP [duplicate]

In Windows XP the file extension gets selected when renaming a file. If I choose to add that extension to the Known filetypes, it doesn't show the extension but the file type still changes. For ...
5
votes
1answer
740 views

Open file with default program from command line

If I click on a file in a GUI file explorer, a default program is used to open it. This is useful for files which I don't know how to open from the command line. Is there a way to open a file with ...
1
vote
1answer
73 views

Figuring out a File's File Extension after it's Changed [duplicate]

Possible Duplicate: How do I find out the file type without an extension? I am wondering if there is any way for understanding for example a file is a video file after we change it's file ...
2
votes
2answers
281 views

How do I make a custom file extension open my java program?

what I'm asking is how to make any associated file type open my program with the corresponding data. For example, if you have a .doc file it opens Microsoft word with whatever is saved to that file. I ...
1
vote
1answer
1k views

How to automatically recover lost file extensions?

We're recoverying bunches of data from a crashed partition of which we had no backup, using a data recovery software. Files are getting recovered, but file names are lost. Is there any software or ...
0
votes
5answers
2k views

Copying a .exe file'contents to .txt and changing extension [duplicate]

Possible Duplicate: How to send an .exe attachment via Google Mail I want to send an exe file as a txt (literally write it as email content and send). I tried opening a new txt file and ...
1
vote
2answers
478 views

Firefox saves the file without extension

When I download a file, Firefox removes the file extension. I mean, if I download "something.pdf", it saves the file as "something". I didn't have this problem before yesterday. Any help would be ...
1
vote
2answers
510 views

How do I dissociate a program from a file type?

If I have a file.class and I opened it with Notepad, how do I destroy that association so that Notepad is not associated with .class? I do not want to change the .class association to another program ...
0
votes
1answer
932 views

How to open/convert a .xmdx file?

I have a file that was sent to me with a .xmdx extension. Is there any way to convert it to something readable or open it with a third party application? I have never seen a file like this before so I ...
1
vote
1answer
507 views

how can i create security catalog(.cat file)

A catalog file contains a list of files and a digest of those files. A digest is a number generated by an algorithm to uniquely identify a given file, like a fingerprint. The digest is used for ...