Comments for What's a '.dat' file?

Comment from Leo on 2005-10-13

2005-10-13T17:41:57Z

I'm closing comments on this article because the comments are all the same, and are all answered in the article. I've reworked the article to be more clear, please be sure to read it.

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Comment from Leo on 2005-10-12

2005-10-12T16:55:35Z

You need to open a Yahoo Messenger .dat file using Yahoo Messenger logged into the same account that created the .dat file.

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Comment from Kid on 2005-10-12

2005-10-12T12:09:27Z

Can u please tell me how to open an yahoo archived message that says dat file. and the symbol is in media player type....i have tried everything and they all say it does not support that kind of file. Need help fast. Please do the needful action in this regard reply me sooon

Thanks

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Comment from Leo on 2005-10-11

2005-10-11T16:41:01Z

An acrobat reader file is a ".pdf" file ... I've not heard of them using ".dat". Either the sender is doing something wrong, or their mail program is. Ask them to either send their mail as "plain text" with the attachment, or if they have some other way to get you the file.

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Comment from Raf on 2005-10-11

2005-10-11T09:16:53Z

Hey Leo, I received a .dat file through e-mail from a Immo-office, they told me it should be opened with Acrobat Reader, but it doesn't seem to work. I replied them with telling them that I couldn't open it and then they just sent it again.
Could you please help me?
Thank you very much

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Comment from Leo on 2005-09-30

2005-09-30T14:31:55Z

Please read the article you just commented on, it answers your question.

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Comment from Abebe on 2005-09-30

2005-09-30T07:23:03Z

Please tell me the meanings of this extension when it comes after several types of files.

Thank you.

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Comment from Leo on 2005-09-01

2005-09-02T05:49:10Z

There's no way to answer that without knowing the application that created it.

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Comment from palin on 2005-09-01

2005-09-02T05:48:20Z

How can i read the contents of ".dat" file and make modifications to it?

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Comment from Leo on 2005-08-09

2005-08-10T03:19:21Z

If that's all it's telling you, I'd try using notepad.

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Comment from I NEED HELP on 2005-08-09

2005-08-10T03:11:23Z

for yahoo it tells me to edit the "emote_user.dat" file... HOW DO I EDIT IT?

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Comment from Leo on 2005-08-03

2005-08-04T00:40:59Z

If you need driver files for your HP printer, I would go to the HP web site.

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Comment from Valdir Silva on 2005-08-03

2005-08-03T21:17:01Z

In what website can I find .dat files? The original driver from HP for installation my HP printer does'n have some .dat files.
Thanks,
Valdir

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Comment from Leo on 2005-07-25

2005-07-26T04:43:11Z

Can you describe the steps you're taking to send a file, and the mail program you use?

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Comment from jo Williams on 2005-07-25

2005-07-25T21:52:00Z

Whenever I send a file from my Word program, it has a .dat extension. Why is that and how can I fix it?

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Comment from Leo on 2005-06-30

2005-06-30T16:59:13Z

Not without knowing what application created the file in the first place, and even then, probably not.

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Comment from FRED on 2005-06-30

2005-06-30T16:26:00Z

Can I convert this file to excel? If so how?

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Comment from Ying on 2005-06-01

2005-06-01T21:32:21Z

I found out that if the .DAT file is a video file, you can open it by renaming it to a .AVI file. Works for me, should work for you.

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Comment from Leo on 2005-05-27

2005-05-28T02:21:47Z

I would assume whatever program was used to create it. There's no way to know otherwise. Ask your friend.

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Comment from Ray on 2005-05-25

2005-05-25T15:55:54Z

Hi:

What software program can merge .dat files associated with jpg file? My friend oversea send me this file "photos in nanning 1.jpg 1_3.dat" and I don't know how to open this.

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Comment from Leo on 2005-05-22

2005-05-22T15:58:02Z

You need to review the instructions that come with Nero for how to burn a cd. Make sure you're burning the correct type: data (for a computer date disk) or audio (for a music CD you can play in CD players).

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Comment from sam on 2005-05-22

2005-05-22T14:13:16Z

I`m running a cd burner with NERO, so far all the CD`s have come out as .dat files. How can I resolve this???

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Comment from Leo on 2005-05-11

2005-05-12T00:01:25Z

Depends on your mailer. If Outlook, make sure that your message format is "plain text" or HTML, and NOT Rich Text.

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Comment from tracy on 2005-05-09

2005-05-09T16:27:51Z

When I send email with attachments, (MS Word, Excel etc.) they are automatically changed to .dat files when received and cannot be opened. How can I stop this?

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Comment from Leo on 2005-04-29

2005-04-29T16:04:11Z

No way to tell. My recommendation: back them up somewhere (maybe burn them to CD), and then delete them. If something breaks as a result, put them back.

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Comment from Alexander on 2005-04-29

2005-04-29T11:17:14Z

I have arround a 450 DAT. files & couldnt open them,what if i deleted them?

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Comment from Leo on 2005-03-24

2005-03-25T01:25:19Z

That's because there is no answer beyond that. Without knowing the application that created the file, there's precious little that can be done. Even then, it typically requires that appliction, and perhaps even more. Yahoo Messenger's .dat file is a good example, you need yahoo messenger AND you need to be logged in as the account that created it.

Sorry I can't tell you more, but there's just not more to be told.

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Comment from Leigha on 2005-03-24

2005-03-25T00:14:52Z

"""Many applications use the file extension ".dat" to indicate a file that contains data. The problem is that so many different programs use ".dat" that it really doesn't tell you anything about the file, what it contains, or what program it belongs to."""..... - is that the entire article.... that's all it shows and it doesn't exactly answer much

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Comment from Reginald Shepherd on 2005-02-05

2005-02-05T23:40:59Z

On several occasions people have emailed me Microsoft Word attachments that somehow have turned into ".dat" files when they reached me through Outlook Express, and Windows XP tells me that they are "Unknown File Format" and cannot open them. (This also happened once when someone tried to send me a file in Rich Text Format.) Why do the files change like this, and is there a way either to convert them back into Word documents or to open the ".dat" files that these Word documents have somehow become?

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Comment from Leo on 2004-11-19

2004-11-20T03:54:10Z

Only with the application that created it, or an application that's designed to be compatible with that original application.

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Comment from Carol on 2004-11-19

2004-11-20T03:16:12Z

I'm experiencing the same problem. My lab ran a research using a software called MEL, which produced .dat files as outputs. Because it is a DOS-based program, do you happen to know how I could crack the data through DOS?

Thanks for your help in advance (much appreciated!!)

Carol

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Comment from Leo on 2004-11-18

2004-11-18T19:10:43Z

Normally a .dat file should only be opened using the application that created it, or an application that is compatible with it. In fact here's a note from the Yahoo messenger help page:

"Please Note: Archives (.dat files located on your system) are encrypted and can only be viewed by the Yahoo! ID that created them. These archives are stored locally on your system, so the conversations held on that specific computer are only accessible from that computer. Once archives are deleted, they cannot be retrieved."

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Comment from lynne on 2004-11-18

2004-11-18T12:55:20Z

i have a few dat files that i want to open. tried opening them with notepad but that didn't work. they are conversations that were automatically saved when chatting on yahoo messenger. how can i open these up?

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Comment from Leo on 2004-11-17

2004-11-17T20:37:01Z

There's no way to know. It depends on the application that has created the .dat file.

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Comment from Trish Clark on 2004-11-17

2004-11-17T11:21:19Z

Thank you for the reply - next question can I use Crystal reports to generate reports from a .dat file? We use Oracle, sqlbase, sqlserver, access but I have never had to assist a customer with a system using .dat files so I am treding on new ground! Thank you in advance.

Trish

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Comment from Leo on 2004-11-16

2004-11-17T04:53:54Z

A .dat file could *be* the applications database. There's just no way to know how it's used or what it contains.

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Comment from Trish Clark on 2004-11-16

2004-11-17T01:56:27Z

What would be the purpose of sending information to the *.dat file rather than sending it to the database?

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Comment from Anonymous on 2004-11-01

2004-11-02T04:06:12Z

open with notepad

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Comment from raheem on 2004-10-25

2004-10-25T15:09:52Z

i would like to open my dat file. the problem is dont know what program to use can any one help. thanks......

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Comment from Leo on 2004-08-29

2004-08-29T18:47:41Z

As stated in the article you just commented on: there's no way to know.

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Comment from Gonzalo on 2004-08-29

2004-08-29T18:41:46Z

Hi!!...How do I read o see the contents of a *.dat file?....Wich program can I use for open it?
Thnaks.

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