Convert NMEA to Markdown.
Drop an NMEA 0183 GPS log and get a tidy Markdown summary of its sentences. It runs entirely in your browser, so your file never leaves your device.
Drag & drop your files
or
Optimize for AI & RAG
Extra cleanup for LLM ingestion: strip HTML, fix smart quotes, tidy Unicode and spacing.
Add YAML front matter
Prepend a metadata block (title, source, date, word & token counts) for knowledge bases and RAG.
Add table of contents
Build a linked index from the headings. Handy for long documents.
Export RAG chunks (.json)
Split the result into retrieval-ready chunks. Download per file from the result panel.
Most converters quietly upload your documents to a server. This one physically can't.
Thousands of lines,
one quick read.
A raw NMEA log is a long stream of cryptic $GP sentences that are hard to skim. The summary tells you, at a glance, how many there are and of which types.
$GPGGA,123519,4807.038,N,01131.000,E,1,08,0.9,545.4,M
$GPRMC,123519,A,4807.038,N,01131.000,E,022.4,084.4
$GPGGA,123520,4807.040,N,01131.010,E,1,08,0.9,545.6,M
3 sentences
# NMEA (GPS data)
- Sentences: 3
## Sentence types
- GPGGA: 2
- GPRMC: 1
Everything you
actually need.
An NMEA log in, a readable Markdown summary out, with no server and no account anywhere.
It never leaves your browser
Your .nmea log is read on your device. Nothing is uploaded to any server, ever.
# Heading
- point one
3 chunks
AI & RAG ready
Optional cleanup, YAML front matter, a table of contents and RAG chunk export.
Works offline
Once the page has loaded you can switch off your connection and it keeps converting.
- Sentences: 3
- GPGGA: 2
- GPRMC: 1
Sentences, tallied
Each line is counted and grouped by its type, giving you a quick per-type breakdown.
Unicode safe
Accents, symbols and non-Latin scripts come through intact as UTF-8.
Free, and unlimited
No sign-up, no quotas, no watermarks. Convert one file or a thousand; it all runs the same way, on your own device.
A summary,
not the raw data.
Honest about what comes through, and what doesn't. The output is a tally of sentences, so the numeric fields inside each one stay behind.
Kept
2- Total sentence count
- A per-type tally
Dropped
3- Position fields
- Time fields
- Speed fields
NMEA questions,
answered.
Everything worth knowing before you drop in a GPS log.
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