What is a .NMEA0183 file?
An NMEA 0183 file is a text log of GPS sentences - the comma-separated lines a satnav receiver emits, each carrying a fix, time, speed or satellite status.
- Did you know
- Every line starts with a tag like $GPGGA and ends with a checksum, a 1980s marine-electronics standard that still underpins consumer GPS today.
- Analyser handles .NMEA0183 alongside related formats such as .TopoJSON, .OSM, .SHP and more.
- In Analyser's format library, .NMEA0183 sits in the Maps & GIS category.
- What Analyser reads
- Inspect geospatial and GIS files without a map: TopoJSON, OpenStreetMap XML, Esri Shapefile siblings (SHP/SHX/DBF/PRJ/CPG), world files, GML, NMEA GPS logs, IGC flight logs, MapInfo TAB/MIF, GDAL VRT, PMTiles, DTED terrain, Esri ASCII grids and SRTM .hgt - surfacing CRS/EPSG, feature/record counts, bounding boxes and elevation ranges. GRIB/NetCDF/GeoPackage/MBTiles/MrSID/ECW identified.
- Depth of analysis
- .NMEA0183 is an identification-grade format: Analyser recognises it from its bytes and decodes the header metadata it carries, rather than opening it in a full viewer. Formats that do get a full viewer are marked "Full" on the formats page.
- Open a .NMEA0183 file
- Drag a .NMEA0183 file onto the Analyser home page (or tap to pick one). It is identified entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.