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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93 views

What is a good file extention for CLI PHP programs?

I use PHP for some OS scripting, is there any proper file extension other than .php for PHP cli programs? So I can assign php.exe to run these kind of files directly. Is .phps a good candidate? I ...
0
votes
1answer
825 views

How do I open a BDC file?

I have a file with a .bdc extension. I've read that it's some kind of dictionary file, but I have no clue what software I can use to open it. Can someone help me out?
2
votes
1answer
221 views

Default program not choosing on Windows 7

I have a file with a .kv6 extension. I used Slab6 (the correct and only program) to edit this file. Slab6 was set as the default program to open it upon double click, but today it stopped using that ...
2
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0answers
112 views

Identify recovered filetype

I'm searching some info about this file. It was recovered from a failed HD, with Ontrack EasyRecovery. The file extension may not be accurate. I tried with TrID (I'm the developer), and based on the ...
4
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1answer
129 views

Windows explorer displays application path instead of file type

Windows explorer in Type columns sometime displays Type name like: "XXX File", sometime displays associated application name like "Adobe Acrobat Document", and for some application it displays full ...
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3answers
102 views

What file types could possibly be a worm or contain a viral infection

On Windows what file extensions do you have to look out for concerning viruses/worms? I ask because I'm wondering if there's a point in scanning .cfm files.
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4answers
44k views

How do I find out the file type without an extension? [duplicate]

After recovering my HDD, I ended up with a lot of files with no extension. Many of them are .bin files. Is there any way to find out what file format they actually are? Many of them have no ...
12
votes
2answers
12k 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 ...
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3answers
8k views

how do I determine the file type of a video file [duplicate]

Possible Duplicate: Tool to view video/audio file information Sometimes I get the url of a video embedded in a webpage and download it, just to find the file has no extension name. I can ...
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1answer
568 views

How to remove trailing whitespace from file extensions and folders snow?

How can I remove trailing whitespace from file extensions and folders in snow leopard ? Ideally I would be able to run a single command within a directory that would search and remove for all files ...
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2answers
4k views

Show/hide extension of a file through OS X command line

I'm looking for a way, via terminal, to change whether or not a specific file's extension is shown in the Finder, something along the lines of: $ hideextension ~/music/somesong.mp3 Without having ...
12
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3answers
5k 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? ...
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votes
1answer
3k 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?
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2answers
3k views

Change Icon of *.dll Back To Original

My idiotic little brother opened a *.dll file with notepad, now it's got that NotePad icon on it. It's a real mess because now I can never distinguish between *.dlls and text files. How do I change ...
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votes
1answer
433 views

How do I save an HDR file for the web?

I made an HDR picture by combining three images in Photomatrix, but I don't know how to use the resulting .hdr file. Moreover, when I open it in phtoshop, it only displays the first image of the ...
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vote
5answers
21k 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 ...
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2answers
2k 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 ...
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votes
1answer
651 views

Opening a .osx file in default program

I'm trying to run Fluenz on my computer and it's a .osx file. When I try to open it, it opens in Textmate. Kind of odd. Does anyone know how to restore its original default program? I think that I ...
7
votes
3answers
2k views

“file.myext” is not a valid Win32 application

I have written a registry that creates .myext. Double-clicking on my file.myext refers to my executable file (converted from a batch file that opens a .jar) which then opens my notepad application. ...
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1answer
128 views

Why do I sometimes get double extension names in OS X?

Sometimes when downloading files, I end up with a file like "foo.txt.txt". Sometimes I end up with just "foo" (and then manually change the extension later). Is this a common problem with OS X? What ...
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1answer
609 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?
2
votes
1answer
1k views

How to play .qtch files?

So I have qtch files that apparently were created with QT 7+ because they can't be played (with QT 7+ or VLC) just by renaming their extension (as fileinfo.com says). Any solution out there ?
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1answer
562 views

How do you open or view the contents of .ch3 files?

We have some Harvard Graphics containing documentation from a legacy system. How can I open or view the contents of these .ch3 files? Or has the file format gone past deprecation?
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votes
1answer
6k views

What's the difference between an *.ova file and a *.ovf file when exporting from VirtualBox?

I'm trying to export a Virtual Machine I have on VirtualBox so I can back it up, and when I went to export it, I was prompted with a "Save As..." dialog that asks me if I want to save it as a .ovf or ...
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votes
1answer
559 views

Missing File extension in list for Select Default Program

Can't open xls files. Go to Set Default Program but the file extension isn't in the list and can't find a means of adding it. This seemed to happen after an auto Win 7 update. Any ideas?
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votes
2answers
5k 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 ...
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votes
1answer
442 views

How do I rename a file or folder to .something in Windows 7?

When I try to rename a folder to .svn or a file to .myemacs, for example, a popup says: You must specify a file name. Do you have a workaround ?
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1answer
2k 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 ...
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1answer
94 views

Handling files without an extension

I'd like to know how Windows XP, Vista and 7 handle files without a file extension. I'd test it myself, but I don't have access to a Windows machine currently. To my knowledge, Windows XP throws up ...
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4answers
2k views

What are the most popular file extensions for COMPRESSed files? [closed]

I was just wondering, what's the difference between these file formats? Shouldn't there be just one or two that generally tend to perform superior to most others?
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votes
4answers
410 views

Are you allowed to come up with any desired file extension (for Unix, Linux, Windows)?

I want to create a file called "message" that contains text only. How does the system know what program to use to read it if I decide to call it: message.txt? message.dat? message.enc? message.cpz? ...
5
votes
2answers
758 views

How does a file have no extension?

Take for instance: cat /etc/passwd Why doesn't this file have an extension such as *.txt*, *.dat*, etc? Or does an extension exist, but it's just being hidden? Does this apply strictly to ...
0
votes
2answers
504 views

What are the alternatives of .txt?

For some reason, I can't save .txt files on my web server. I have a text file hosted on my web server, but the ending is not .txt I was wondering what ending should I choose, so that whoever sees ...
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0answers
405 views

How can I unarchive .IAB files?

I'm attempting to recover data for someone and was given a backup hard drive filled with .IAB files. I've searched Google and have tried tar and gunzip on OS X 10.6 but with no success. How can I ...
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votes
4answers
1k views

Get Windows to treat files with the same extension differently

Multiple programs use the same file extension, but the formats are totally different and incompatible. For instance, I have .sch files on my computer that are in at least 5 different formats (TINA, ...
9
votes
2answers
6k views

There is a length limit to Windows file extensions?

If I want to create a new file extension for a binary/text data file that will open on my own application (extension ".mylongfileextensionname" for example), will Windows list it with my aplication ...
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0answers
536 views

How to open a .HM file in Windows7?

I've been sent a document as a .HM file, this is most likely an "Unknown Apple II File" rather than "Windows Help Context IDs" (used by MAKEHM.EXE.) Are there any other applications that save ...
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1answer
5k views

How to extract the filename extension out of %f in script?

The windows %%f returns the full name of the file as 'filename.ext' e.g. for /r %%f in (*.wav) do echo %%f Is there a way to extract the filename without the extension from %%f?
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votes
1answer
2k views

Creating custom file extension with windows registry

Ok, so I have been reading and googling this for a while now and I can't understand what is going wrong. I am trying to create a .int file extension in my registry so that I can add the ShellNew key ...
2
votes
3answers
459 views

Does “show all filename extensions” actually work in Mac OS X?

Quite simply, the option in Finder prefs to show all filename extensions is checked, but sometimes when I save something, e.g. a text file, and don't explicitly specify a filename in the save dialog, ...
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votes
3answers
396 views

Why does Windows append .php to my php files but not other ones

I have many different types of files in a folder - .php, .css, .htm, .js, .docx, .xls, etc. The only file type that Windows (viewed from Windows Explorer) actually shows the extension are the .php ...
3
votes
1answer
3k views

How to set a default file extension for a specific download?

I'm using chrome web browser and when I download a file it saves the file with .jsp extension. Everytime I have to change the extension to my desired extension (i.e. .ica). Just setting the default ...
4
votes
3answers
21k views

Differences between TIFF,TIF,tiff,tif

I have seen TIFF files having various extensions - TIFF,TIF,tiff,tif. Are they same? Can I safely rename a file with TIFF extension to tif or will it cause loss of information?
1
vote
1answer
529 views

New text files are created with uppercase extensions

Whenever I want to create a new text file using Windows 7 Explorer’s New ⇨ Text File context-menu entry, I get a file with an uppercase extension. For example instead of New Text Document.txt, I get ...
0
votes
0answers
105 views

photo is saved in memory card but i cant see [duplicate]

Possible Duplicate: How to open nokia photo images with .nrw extension? I have a photo in a memory card, but I can't see it. It's file format is .nrw, where is it stored? How can I get ...
2
votes
3answers
2k views

changing the nature of .dat file

Some time ago I changed the way my computer reads .dat files by forcing it to always open with KM player. Now, if I save a .dat file in my laptop, its properties says that its a KMP-MPEG file. I want ...
90
votes
4answers
41k views

Is there a tool that can determine the file type from containing data? [closed]

I sometimes get files from my clients that have the wrong file extension. For example, the name is image.jpg but the file is actually a TIFF image. In many cases I can clarify it by opening the file ...
4
votes
6answers
2k views

How can I find out about an unknown file extension?

When I have a random file of unknown format with a file extension I've never heard of, where can I turn to find out about the extension. The obvious choice is to google the extension along with some ...
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votes
3answers
7k 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? ...
2
votes
2answers
4k views

Google Chrome has taken over all HTML handling…

It's really getting on my nerves, but Google Chrome has taken over all HTML handling. For example, when you open Spotify... it runs C:/Users//AppData/Local/Spotify/flashdetect.html, but now that page ...