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 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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4answers
2k 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, ...
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2answers
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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
590 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
7k 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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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 ...
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votes
3answers
537 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
403 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 ...
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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 ...
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votes
3answers
33k 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?
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1answer
617 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 ...
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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 this ...
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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 ...
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votes
4answers
69k 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 ...
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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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3answers
11k 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?
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votes
2answers
6k 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 ...
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vote
1answer
654 views

Where can I get AA or AAX file format?

I need to test a AA and AAX file format for iphone testing. I tried google searching with filetype:aax. But I could't find it easily. Where do I find these samples?
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2answers
2k views

Remove association with blank file extension?

The launcher for Mass Effect 2 mistakenly associates itself with files with no extension. The game's patch apparently fixes this, but it's too large for me to download on this connection. How do I fix ...
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8answers
26k views

File extension for Markdown files?

Is there an official file extension for standalone Markdown files?
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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 ...
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1answer
1k views

Create new extension association and icon in SnowLeopard

I was searching for the best way to add a new file extension type (.xyz) and associate an icon to all files of that kind in SnowLeopard.
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4answers
3k views

What are .ddoc file extension?

I received file with extension .ddoc instead of .xls or .xlsx. So - what are .ddoc files? Are they even related to Microsoft Excel?
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1answer
702 views

Why Does DreamWeaver CS5 Discriminate between File Extensions, Even After Modding Mime Types?

Hi folks, Even After I forced DreamWeaver CS5 to allow opening of .ast extensions as a MIME type of php5, which DreamWeaver now opens and colors correctly as described here, I still have trouble ...
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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 ...
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votes
1answer
2k views

Running shortcut from command prompt without the .lnk extension (Windows)

I have created a folder (d:\shortcuts), created shortcuts for most applications in this folder and appended the folder path to the Path environment variable. Now all my applications are available from ...
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votes
1answer
3k views

Firefox appending .xls extension to .xlsx files

We are serving files with the .xlsx (excel 2007/2010) extension. IE, Chrome, Safari all download the file and open excel just fine. For some reason Firefox is appending .xls to the extension. I ...
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1answer
1k views

How to remove file association and display the file extension in Windows 7

The default behavior when set file association for a file type, in explore the extension won't show in file name again. Is there any way to let the file extension show again? In Windows XP this can be ...
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votes
6answers
44k 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?
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votes
1answer
3k views

Is it possible to change MS paint's default save file type to PNG [duplicate]

Possible Duplicates: How to set default file format for MS Paint How do I make Windows pbrush default to a save-as JPG format? PNG is better than BMP in my work and I too often forgot to ...
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3answers
2k views

Hiding files of a certain extension (.pyc) from Nautilus

I would like to hide every .pyc file from Nautilus. I use Ubuntu 10.04. What could I do?
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2answers
434 views

Google Chrome mistakenly adds extra .gz at the end of downloads

Every time I try to download a .gz file, Chrome appends an extra .gz at the end of the filename Is this a known bug? Any workarounds?
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votes
5answers
522 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 ...
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votes
2answers
876 views

Same filename with a different extension

I have a fairly large collection of music, some of which I have ripped at different times with different software. Through all my updates and additions to my collection, I have ended up with a ...
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votes
1answer
906 views

Firefox is changing file extensions on downloads

Today I downloaded a .reg file, and Firefox made it a .reg.txt file. I downloaded a .zip file and Firefox made it a .zip.htm file. Both files worked fine when I fixed the extensions. What happened ...
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votes
0answers
5k 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 ...
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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 ...
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votes
3answers
11k 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
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vote
1answer
383 views

Force the .png extension on Mac Screenshots

It's very easy to take a screenshot on the Mac with either Command-Shift-3 or Command-Shift-4, and they will be dumped on your desktop. One major annoyance, however, is that the files created have no ...
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votes
0answers
7k views

Always use the selected program, always greyed out [duplicate]

This one is driving me nuts, I'm trying to change the default program for sln files but for some reason the "always use the selected version" is always greyed out. How do I get that little grey box ...
2
votes
5answers
4k views

What does the 'X' in .aspx, docx, xlsx, etc… represent? [duplicate]

Possible Duplicate: What does X denotes in ASPX, DOCX, XLSX, PPTX etc? It's one of those things you just take for granted until one day someone asks you and you realize you can't answer it. ...
9
votes
3answers
7k 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 ...
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votes
3answers
129 views

how to change extension of a file in Windows?

I downloaded a perl file from some webpage by opening it in my browser and saving it. But the saved file has a file name xxx.pl.txt. How can I save it into a file with "pl" as its extension? Also ...
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1answer
1k views

Does Microsoft Word for Mac save files with extensions?

When you save a document in Microsoft Word for Mac, does the resulting file have an extension (e.g. ".doc" or ".docx")?
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votes
3answers
3k 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 ...
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votes
2answers
5k views

How to create a default association for files with no extension [duplicate]

Possible Duplicate: How to set the default program for opening files without an extension in Windows? I am using http://www.pnotepad.org/ (i wouldnt mind switching to something else if it ...
3
votes
1answer
272 views

Windows 2003 lost file extensions

I have a server with windows 2003, recently i installed a software in this server. When i restarted server my all files can't open sending to a command prompt saying: No program associated with ".exe" ...
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votes
4answers
19k 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 ...
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votes
2answers
4k views

What virus renames all images to EXE? [duplicate]

Possible Duplicate: How do I get rid of malicious spyware, malware, viruses or rootkits from my PC? I have a virus that renames all jpg file extensions to EXE files and hide the original files ...
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votes
4answers
2k 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?