Opening an LFS File

The LFS file type is primarily associated with Mimecast.

LFSFile Extension LFS
File extension: LFS
File type:  data container

What is an LFS file

LFS files mostly belong to Mimecast. LFS files are most often used as part of the Mimecast Large File Storage system. They rely on an XML structure to hold metadata, file pointers, and other data needed to handle large files efficiently in that environment.
These files are not designed for everyday user edits. Instead, they act as structured data containers that are processed by dedicated software. In some cases, an LFS file may also be used as a game data file, although that usage follows a different internal organization.

  • Format: XML-based, making the content readable in a plain text editor.
  • Primary Usage: Stores metadata and file references for Mimecast's large file management system.
  • Alternate Role: Occasionally serves as a container for game data.
  • Handling: Best processed with Mimecast tools; manual inspection is possible using a text editor if needed.

FilExt.com tip: More details can be found at the Mimecast Community.

How to open LFS files

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

Online LFS Text Viewer

Choose your .lfs file to view

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How to extract texts from LFS files or capture a screenshot to PDF, JPG, DOCX, TXT, ...

You can extract texts from LFS file or capture a preview screenshot using our online LFS file viewer:
  1. Just click the "Choose your .lfs file to view" button on this page.
  2. After your file is opened in browser,
  3. click "Save as..." in the menu.
  4. Then choose the file format (e.g. JPG, PDF, DOCX, TXT, ...) you want.
  5. Download the converted file.

Programs that open and convert LFS files:

  1. Mimecast
    See the previous paragraphs to learn more about the main application. LFS files are often referred to as Mimecast data files because this type of file is primarily created or used by this software.
  2. Mimecast Secure Email (Email Attachment) by Mimecast
    LFS stands for "Large File Send" and is offered by Mimecast's cloud-based Secure Email Gateway. A LFS file is an XML file and contains information about email attachments, e.g. file name, path, title. The text file can be viewed with any text editor line "Windows Editor". This file format is classified as Attachment.

Technical Data for LFS File Extension

File classification:
Data
Related files:

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: LifeForms.Skeleton
EXEFile: %ProgramFiles%\Life Forms 3.9 Demo\Life.exe /open %1

ProgramID: FrameShowImp.Document
EXEFile: %ProgramFiles%\FrameShow\Import\FrameShowImp.exe


an lfs data container is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with LFS files

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