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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How to get a text list of files names in a folder in windows

I have a folder that has different file formats, is there a way to get all the files names and their extensions at once instead of copying and pasting
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254 views

Can't un-associate .css extension from Visual Stdio 2013

In - Control Panel\Programs\Default Programs\Set Associations under .css file , it has Microsoft Visual Stdio 2013 as Currect Defualt - I try to change its current default under the Change ...
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1answer
76 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 ...
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3answers
131 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 ...
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1answer
1k 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 ...
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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 ...
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2answers
5k 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 ...
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1answer
141 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 ...
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1answer
128 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... ...
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1answer
398 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 ...
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1answer
68 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 ...
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0answers
41 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, ...
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1answer
25 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 ...
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3k 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 ...
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3answers
18k 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".
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1answer
4k 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 ...
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2answers
3k 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 ...
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1answer
468 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 ...
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2answers
377 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 ...
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3answers
1k 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 ...
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2answers
2k 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?
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1answer
3k 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 ...
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1answer
156 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 ...
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1answer
27 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 ...
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1answer
721 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" ...
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1answer
684 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 ...
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1answer
150 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 ...
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1answer
221 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 ...
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2answers
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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 ...
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14answers
23k 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 ...
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1answer
445 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 ...
2
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1answer
580 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.
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242 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 ...
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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. ...
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1answer
297 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")
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1answer
86 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 ...
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1answer
32 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 ...
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1answer
386 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 ...
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1answer
133 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 ...
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1answer
2k views

How to 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 ...
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1answer
104 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 ...
3
votes
2answers
662 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 ...
2
votes
1answer
4k 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 ...
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vote
3answers
3k 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 ...
2
votes
3answers
4k views

How do I unassociate 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 ...
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1answer
3k 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 ...
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1answer
1k 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 ...
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2answers
364 views

Details about “Hide Extensions of Known file types” from Windows Explorer

What does "known file types" actually mean? What makes a file type "known"? Can I explicitly add or remove extensions/types from the list of "known" file types?
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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
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3answers
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Sending *.exe by changing extension failed

I know you can send .exe through email by changing their extension. I've been using this often. But strange thing happen when I tried to send this specific ".exe" file. It failed!! It's this ...