All about BLT Files

The BLT file type is primarily associated with AIM.

BLTFile Extension BLT
File extension: BLT
File type:  binary data file

What is a BLT file

BLT files mostly belong to AIM. BLT files serve several purposes depending on their source.
For example, one common use is as a AOL Instant Messenger (AIM) buddy list. In this case the file holds contact details for chat users and is used by AIM software (AIM website).
Other uses include:
  • Binary Large Text: Files that contain large blocks of text in binary format. Some records even note these may relate to theme data on mobile devices.
  • Binary Book Data File: A format for storing book content in binary form, sometimes used by e‐reading applications.
  • Quran Audio File Format: Files used to store audio recitations of the Quran. Some variations also reference a binary vector graphics layout, with users often directed to resources like Quran.com.
  • Binary Large Object Template: A game data archive format used in development environments such as BlitzBasic.
  • FilExt.com tip: Examine your file’s origin or try opening it with a text editor to find clues about its intended software.

    How can I open a BLT file?

    You need a suitable software like AIM to open a BLT file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your BLT file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a BLT file directly in the browser:. Just drag the file onto this browser window and drop it.

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    Programs that open and convert BLT files:

    1. AIM
      See the previous paragraphs to learn more about the main application. BLT files are often referred to as AIM data files because this type of file is primarily created or used by this software.
    2. AOL Instant Messenger ((AIM) Saved Buddy List File) by America Online, Inc.
      The identifying characters used for this association are - Hex: 43 6F 6E 66 69 67 20 7B, ASCII: Config.{. Program ID is AOL Instant Messenger.ConfigFile
    3. CATC Merlin (Bluetooth Trace Files) by Computer Access Technology Corporation (CATC)
    4. Wordperfect for DOS by Corel Corporation
      Related links: CKNOW Info Page

    BLT format details:

    If you can determine the file format, the associated program can also be determined. The file format can be determined based on the file extension and the signature (the first few characters of a file). However, different programs can use the same file extension, and file extensions can be assigned incorrectly. Knowledge is power - this also applies when dealing with unknown or faulty files. Our analysis of the BLT files produces the following result:

    The BLT file type covers different formats for different programs. The two most common formats are as follows:

    All other BLT files (55%) have no uniform format, such as BOLT game data archive and Call. These files are often connected to rules, election, results, shuraim, stackoverflow, capitolo, sudais or xsqr. Drag & drop your file here to see the file format and a preview of your BLT file!

    Technical Data for BLT File Extension

    File classification:
    Data
    Identifier:
    Hex: 43 6F 6E 66 69 67 20 7B, ASCII: Config.{ (provided by TrID database)
    Program ID:
    AOL Instant Messenger.ConfigFile
    Related files:
    blts, btl, bit, wps, tvd, plt, blf, rar, txt, pdf, exe, jpg, zip, bag, aim, a11, dat, cfg, xml, bin

    The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

    ProgramID: AOL Instant Messenger.ConfigFile, AppName: AOL Instant Messenger
    EXEFile: aim.exe

    ProgramID: AOL Instant Messenger.ConfigFile, AppName: AOL Instant Messenger (SM)
    EXEFile: aim.exe

    ProgramID: AOL Instant Messenger.ConfigFile, AppName: AOL Instant Messenger (TM)

    ProgramID: AOL Instant Messenger.ConfigFile, FileType: AOL, AppName: Notepad

    ProgramID: BryceLightning, FileType: BryceLightning, AppName: Bryce5

    ProgramID: AOL Instant Messenger.ConfigFile
    EXEFile: %ProgramFiles%\AIM95\aim.exe -I%1

    ProgramID: AOL Instant Messenger.ConfigFile
    EXEFile: %ProgramFiles%\aim\aim.exe -I

    ProgramID: AOL Instant Messenger.ConfigFile
    EXEFile: %ProgramFiles%\AIM\aim.exe -I%1

    ProgramID: AOL Instant Messenger.ConfigFile
    EXEFile: %ProgramFiles%\Netscape\Communicator\Program\AIM\aim.exe -I%1

    ProgramID: AOL Instant Messenger.ConfigFile
    EXEFile: f:\browsers\netscape472\Program\AIM\aim.exe -I%1

    ProgramID: AOL Instant Messenger.ConfigFile
    EXEFile: d:\Netscape\Communicator\Program\AIM\aim.exe -I%1

    ProgramID: AOL Instant Messenger.ConfigFile
    EXEFile: %ProgramFiles%\Messenger\AIM\aim.exe -I%1

    ProgramID: AOL Instant Messenger.ConfigFile
    EXEFile: C:\DOCUME~1\lee\aim.exe -I%1

    ProgramID: AOL Instant Messenger.ConfigFile
    EXEFile: %ProgramFiles%\earthlinkim\aim.exe -I

    ProgramID: AOL Instant Messenger.ConfigFile
    EXEFile: %ProgramFiles%\Netscape\COMMUN~1\Program\AIM\aim.exe -I%1

    ProgramID: AOL Instant Messenger.ConfigFile
    EXEFile: %ProgramFiles%\RRIM\aim.exe -I%1

    ProgramID: AOL Instant Messenger.ConfigFile
    EXEFile: %ProgramFiles%\earthlinkim\aim.exe -I%1

    ProgramID: AOL Instant Messenger.ConfigFile
    EXEFile: %ProgramFiles%\instant messenger\aim.exe -I%1

    ProgramID: AOL Instant Messenger.ConfigFile
    EXEFile: %ProgramFiles%

    ProgramID: bltfile
    EXEFile: %ProgramFiles%\AIM6\aim6.exe /d locale


    a blt binary data file is a special file format and should only be edited and saved with the appropriate software.

    How to solve problems with BLT files

    • Associate the BLT file extension with the correct application.
    • Update your software that should actually open binary data files. Because only the current version supports the latest BLT file format. Search, therefore, e.g. on the manufacturer website after an available AIM update.
    • To make sure that your BLT file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
    • Click here to open your .BLT file online - secure, fast, and no downloads needed.
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