What is a NMEA file?
A .NMEA file is a NMEA Data File. The National Marine Electronics Association defines the standard for these files. These files store GPS and GNSS navigation data. Marine equipment, surveying tools, and consumer GPS devices use this format to log location, speed, and time data. The data usually follows the NMEA 0183 standard and contains plain text lines called sentences.
How to open NMEA files?
You can open .NMEA files with GIS software like QGIS or marine navigation tools like SEAiq. Because the files contain text data, you can also view them with standard text editors like Notepad++ on Windows or TextEdit on macOS. Developers can parse .NMEA files using programming libraries such as pynmea2 for Python.
Best practices and troubleshooting
If your software cannot read the .NMEA file, check the file extension. Sometimes devices save GPS data as .LOG or .TXT. You can rename the extension to .NMEA if the data follows the NMEA standard. If you want to use the data in consumer mapping software, you might need to convert the .NMEA file to .GPX or .KML using a command-line utility or interface like GPSBabel.
Inspect your files with viewer.online
Because the .NMEA extension can sometimes contain proprietary manufacturer extensions or corrupted logs, viewer.online/nmea can analyze .NMEA files to identify the exact format and creator software, inspect the file structure, extract readable text, and check whether an online preview is available.
Summary
viewer.online/nmea is useful for identifying, inspecting, and understanding .NMEA files without installing software or dealing with compatibility problems.