All about LO4 Files

The LO4 file type is primarily associated with SeeYou.

LO4	File extension: LO4
	File type:	Flight Data

What is a LO4 file?

LO4 files mostly belong to SeeYou by Naviter. SeeYou is a planning and analysis tool for glider pilots. It is designed for the desktop and notebook PCs.

How to open LO4 files

You need a suitable software like SeeYou to open a LO4 file. You need a suitable software like SeeYou from Naviter to open a LO4 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 LO4 file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a LO4 file directly in the browser:. Just drag the file onto this browser window and drop it.

Online LO4 Text Viewer

Choose your .lo4 file to analyze

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Online File Viewer

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Unable to Open a .LO4 File? Quick Solutions:

LO4 files can come from different programs and aren't universally openable.

Identify the Source: These files often contain flight data generated by LX4000 or LX5000 glider flight recorders, typically used by pilots for track analysis.
Check the Header: Open the file in a text editor or hex viewer. If you see readable text with GPS coordinates or timestamps, it's a plain-text track log. If you see random characters, it is likely a compiled binary format.
Use the Original Software: To properly view the flight path, use specialized aviation software like Naviter SeeYou or CouTraCi. If uncertain, ask the sender for the exact hardware used.
Use this Webpage: Drag and drop the file into our viewer to detect the format, extract readable text/metadata, and preview when possible.

Technical Data for LO4 File Extension

Related files:

l04, mul, cai, lxn, lo3

a lo4 Flight Data is a special file format by Naviter and should only be edited and saved with the appropriate software.

How to solve problems with LO4 files

Associate the LO4 file extension with the correct application.
Update your software that should actually open flight data files. Because only the current version supports the latest LO4 file format. Search, therefore, e.g. on the Naviter manufacturer website after an available SeeYou update.
To make sure that your LO4 file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .LO4 file online - secure, fast, and no downloads needed.