Opening an HLN File

The HLN file type is primarily associated with MicroStation.

HLN	File extension: HLN
	File type:	Hidden Line File

What is an HLN file?

HLN files mostly belong to MicroStation by Bentley Systems, Incorporated. MicroStation is used by teams of architects, engineers, contractors and GIS professionals for work on buildings, civil engineering projects, power plants and geospatial information.

How to open HLN files

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

Online HLN Text Viewer

Choose your .hln file to analyze

or drag and drop it here

Online File Viewer

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Unable to Open a .HLN File? Quick Solutions:

Because .HLN files can originate from different specialized programs, they aren't universally openable by standard applications.

Identify the Source: If received from an architect or engineer, it is likely a CAD/CAM Hidden Line File.
Check the Header: Open the file in a hex viewer or text editor to inspect the first few bytes:
- Readable text or XML suggests a configuration or log file.
- Binary data or specific magic bytes often indicate a proprietary CAD format.
Use the Original Software: You usually need the original program to open it; try Bentley MicroStation, or ask the sender for the specific software used.
Use this Webpage: Drag and drop your .HLN file into our viewer above to detect its exact format, extract readable metadata, and preview the contents.

Technical Data for HLN File Extension

File classification:

CAD/CAM

Related files:

upf, dgn, svf

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: MicroStation HLN File
EXEFile: %ProgramFiles%\Bentley\Program\PowerDraft\draft.exe %1

ProgramID: MicroStation HLN File
EXEFile: %ProgramFiles%\Bentley\Program\MicroStation\ustation.exe %1

ProgramID: MicroStation HLN File
EXEFile: %ProgramFiles%\Bentley\Program\View\BentleyView.exe

ProgramID: MicroStation HLN File
EXEFile: %ProgramFiles%\Bentley_NoCADtools\Program\MicroStation\ustation.exe

Show all 4 listings To Top

an hln Hidden Line File is a special file format by Bentley Systems, Incorporated and should only be edited and saved with the appropriate software.

How to solve problems with HLN files

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