Opening LDF Files

The LDF file type is primarily associated with SQL Server.

LDF	File extension: LDF
	File type:	transaction log file

What is an LDF file?

LDF files mostly belong to SQL Server by Microsoft. The LDF file extension is primarily associated with the ProWORX NxT, a Microsoft Windows based software by Schneider Electric that helps programmers in creating programs for Programmable Automation Controllers (PACs). These LDF files are known as Logic Data Files.

Main Usage: The main purpose of these logic data files is to stores logic data that would be used for internal purposes of the ProWORX NxT. These files are categorized as controller memory files.
Associations:
- SQL Server Transaction Log File: SQL Server, a relational database management system by Microsoft, also uses LDF file extension for its log files. These files keep a log of up to the minute actions as performed by the database. These actions are being tracked to have recovery options in case of hardware failure or other form of losses.
- Lingoes Dictionary Source File: Lingoes, a dictionary and text translation program, also uses LDF file extension for its source files. These source files store dictionary information about titles or definitions in plain text format.

How can I open an LDF file?

You need a suitable software like SQL Server to open an LDF 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 LDF file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a LDF file directly in the browser:. Just drag the file onto this browser window and drop it.

Online LDF File Viewer

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Online File Viewer

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How to convert LDF files to JPG, PDF, HTML, DOC, ...

You can convert LDF files using our online LDF file viewer (powered by Convert.Guru):

To do this, click the button "Choose your .ldf file to view" on this page.
After your file is opened in browser,
click "Save as..." in the menu.
Then click the file format (e.g. PDF, JPG, DOCX, TXT, ...) you want.
Download the converted file.

Programs that open and convert LDF files:

SQL Server by Microsoft
See the previous paragraphs to learn more about the main application. LDF files are often referred to as SQL Server miscs because this type of file is primarily created or used by this software.
enotate (layered data format file) by Informal Software
Enotate allows you to add hand-written notes to a variety of file formats. The LDF file is a real-time data, command, and embedded object definition file, with the concept of embedded overlays of data and other objects. This file format is classified as Raster Image.
Geoworks
IrfanView by Irfan Skiljan
IrfanView is a program developed by Irfan Skiljan for viewing and editing 2D graphics. The program is compatible with various image formats, including those used by the LDF file extension. This file format is classified as Raster Image. Related links: XnView
Lingoes (dictionary data file) by Lingoes Project
Lingoes is a dictionary and translation software developed by the Lingoes Project for the Windows operating system. The program uses LDF files to store dictionary data. This file format is classified as Simple text file.
OS/2 (data filer form) by IBM
OS/2 was an operating system developed by IBM, last updated in December 2001. The operating system is obsolete and no longer supported. This file format is classified as Data.
ProWORX Nxt (logic data file) by Schneider Electric
Found in the NxT directory. This file format is classified as Data.
TriboIndenter (calibration file) by Hysitron Incorporated
Used by TriboIndenter, a complete automated nanomechanical test system. The file is typically named QUARTZ.LDF or AIRINDENTER.LDF.

LDF file format:

If you can determine the file format, the associated program can also be determined. Often, the file format can be deduced from the file extension or the initial bytes (called the signature). If the file extension or signature does not match the file format, errors will occur when opening or editing the file. If there are problems opening a file, you must first determine the file format used. Our evaluation of the LDF files looks like this:

You will often come across the LDF file type. This includes different formats for the applicable programs. But the following two file formats are common:

65% of all LDF files belong to Microsoft SQL Server log. They consist of illegible, cryptic characters. LDF files can be up to 6 GB in size, but are often around 520 KB - 53 MB. The file type was created 10 years ago, but is still used today. Such LDF files store data about data, database, templog, system, msdblog, mastlog, project and works.
7% of all LDF files have the same signature .HEADER LIBRARY_FILE . The contents of these files are easily readable with a text editor. LDF files can be up to 65 KB in size, but are often around 3 KB - 52 KB. The following keywords are characteristic: .END_HEADER, .HEADER, .ELECTRICAL, LIBRARY_FILE 3, THOU, 0 allegro_17 and 0 allegro_16.

All other LDF files (28%) have different formats, the following 6 formats exist: LuraDocument Format bitmap, LDF and CHIT. Files like these are sometimes linked to hires or night. Drag & drop your file here to see the file format and a preview of your LDF file!

Technical Data for LDF File Extension

File classification:

Misc

Related files:

idf, mdf, hmi, bdf, lin, emn, lfd, arxml, zip, lbf, u, avi, bak, rar, lxf, fdb, ldb, dbc, txt, pdf, rdl, dsv, trn

Mime type:

application/octet-stream, text/xml

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: ACDSee.LDF, FileType: ACDSee LDF Image, AppName: ACDSee for Windows 95/98/2000/NT

ProgramID: GraphicsConverterPro.ldf, FileType: LuraDocument Format, AppName: GraphicsConverter-reg
EXEFile: GraphicsConverter.exe

ProgramID: IrfanView.ldf, FileType: IrfanView LDF File, AppName: IrfanView

ProgramID: ACDSee.LDF
EXEFile: %ProgramFiles%\ACD Systems\ACDSee\ACDSee.exe /dde

ProgramID: ACDSee.LDF
EXEFile: %ProgramFiles%\ACDSYS~1\ACDSee\ACDSee.exe /dde

ProgramID: ACDSee.LDF
EXEFile: %ProgramFiles%\HEWLET~1\PHOTOS~1\ACDSys\ACD\ACDSee\ACDSee.exe /dde

ProgramID: XnView.Image
EXEFile: %ProgramFiles%\XnView\xnview.exe %1

ProgramID: IrfanView.ldf
EXEFile: %ProgramFiles%\IrfanView\i_view32.exe

ProgramID: IrfanView.ldf
EXEFile: %ProgramFiles%\IRFANV~1\i_view32.exe

Show all 9 listings To Top

an ldf transaction log file is a special file format by Microsoft and should only be edited and saved with the appropriate software.

How to solve problems with LDF files

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