View NMEA files in your browser
What a GPS receiver says, sentence by sentence, as boats, dashcams and loggers record it. Open an NMEA log right here as a track on a map. The file never leaves your device.
Or drop it anywhere on this page
What you'll see
Your file opens on a map, framed to fit, its layers drawn over OpenStreetMap's streets and what it holds listed beside it.
- OpenStreetMap, dark or light • Flat or a globe
- Every layer and feature in a list • Search their names and fields
- Click a feature for its fields • Measure distances
- Export • PNG, GeoJSON, GPX, KML and CSV
About NMEA
The National Marine Electronics Association published NMEA 0183 in 1983 so ships' instruments could talk to each other. Almost every GPS receiver still speaks it, and boats, dashcams, drones and data loggers save what it says as .nmea logs.
Each line is a sentence, like $GPRMC with the date, time, place, speed and course, or $GPGGA with the time, place, height and how many satellites were used, ending in a checksum.
Filepeek reads the RMC and GGA sentences in your browser, leaves out any whose checksum doesn't add up, and puts the rest together by their time into a track over OpenStreetMap. Click a point for its time, speed and satellites, and save the track as GPX, KML, GeoJSON or CSV.
NMEA 0183 log
.nmea
Format
- MIME type
- text/plain
- Made by
- The National Marine Electronics Association
- Released
- 1983
Inside the file
- Holds
- GPS sentences, a line each
- Sentences read
- RMC and GGA
- Each fix
- Time, place, speed and height
- Built on
- Text
Opens in every browser
Filepeek opens NMEA files on a map in Chrome, Edge, Firefox and Safari. On their own, browsers download them.
- YouChromeOpens through Filepeek
- YouEdgeOpens through Filepeek
- YouFirefoxOpens through Filepeek
- YouSafariOpens through Filepeek
Apps that open NMEA
- WindowsGPSBabel converts it • u-center reads it
- MacGPSBabel converts it
- iPhone and iPadNo app opens it
- AndroidNo app opens it
Questions
How do I open an NMEA file?
Drop it on this page or choose Peek an NMEA. Its sentences open as a track on a map.
Does a .log or .txt of NMEA sentences open?
Name it .nmea, or give it no extension, and Filepeek reads its sentences. Other .log and .txt files open as text.
Why are some points missing?
A sentence whose checksum doesn't add up was garbled on its way, so it's left out.
Can it play the video an NMEA file was logged with?
Yes. Drop a dashcam's clip with the .nmea of the same name, and the route is drawn on a map beside the video as it plays.
Can I convert NMEA to GPX?
Yes. Open it, choose Export, then Save the features as GPX, each fix with its height.