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Spatly

Convert GPX to KML

1

Add your GPX

Drop a GPX file anywhere on this page

.gpx · it never leaves the browser

2

Options

≈ 11 cm on the ground
Keep every vertex
00verticesunchanged
Becomes <name>; the rest goes into ExtendedData.
Becomes the balloon text.
3

Your KML

Add a GPX file and the KML appears here, with its feature counts and anything this pair cannot carry.

Converted in this tab. Your GPX is never uploaded — reading, converting and writing all run in the browser, so this works offline once the page has loaded.
— , —
FidelityGPX → KML

What comes across, and what cannot

Preserved

  • Geometry — points and lines come across coordinate for coordinate; nothing is reprojected, because both sides are WGS84 longitude/latitude.
  • Every attribute survives, with its name intact.
  • Elevation (the Z ordinate) is preserved where the source has one.

Worth knowing

  • Nothing measurable. Both GPX and KML carry geometry and a full attribute table, so this conversion is lossless apart from any coordinate rounding or simplification you ask for.

GPS Exchange Format (GPX)

What GPS units and fitness apps speak. It has exactly three containers — waypoints, routes and tracks — so it holds points and lines but has no concept of an area, and only a fixed set of fields per point.

.gpx · application/gpx+xml

Keyhole Markup Language (KML)

The XML format Google Earth popularised. Placemarks carry a name, a description balloon, a geometry and — unlike GeoJSON — presentation: styles, icons, colours, altitude modes and time stamps.

.kml · application/vnd.google-earth.kml+xml

AlsoKML to GPXShapefile to KMLKMZ to KMLGPX to GeoJSONAll conversions
HowHow it works

Convert GPX to KML, step by step

  1. Step 1

    Add your GPX

    Drop a GPX file anywhere on the page, paste it, point at a URL, or press Sample to start from real data. Several files at once are fine.

  2. Step 2

    Set what matters

    Coordinate precision and simplification on every pair, plus the handful of settings this one needs — which field becomes the placemark name and description.

  3. Step 3

    Take the KML

    Read the feature counts and the warning list, then download, copy, or open the result in the Spatly studio to style and publish it.

PrivateRuns in your browser

Your data never leaves the page

Every conversion, measurement and export happens client-side. Nothing is uploaded, logged or stored — you can even use this offline once the page has loaded. Only “Open in Studio” sends data, and only after you sign in.

Go furtherTurn a GeoJSON into an interactive mapRead the guide
FAQQuestions

Good to know

What is preserved when converting GPX to KML?
Geometry — points and lines come across coordinate for coordinate; nothing is reprojected, because both sides are WGS84 longitude/latitude. Every attribute survives, with its name intact. Elevation (the Z ordinate) is preserved where the source has one.
What is lost converting GPX to KML?
Nothing measurable. Both GPX and KML carry geometry and a full attribute table, so this conversion is lossless apart from any coordinate rounding or simplification you ask for.
Do I get my waypoints and my track?
Both. Waypoints (<wpt>) become point features, tracks (<trk>) and routes (<rte>) become line features, and each track segment is kept as its own line so a paused recording does not join up into a straight line across the map.
Are elevation and time kept?
Elevation becomes the Z ordinate wherever the target format has one. Per-point timestamps are read as attributes; they are not a time dimension in KML.
Which field becomes the placemark name?
Whichever you choose in step 2. The tool pre-selects a field called name, title or label if it finds one; every other attribute is written into <ExtendedData> so Google Earth shows it in the balloon. You can also nominate a field to become the <description>.
Will the output open in Google Earth?
Yes — the file is KML 2.2 with a single <Document>, one <Placemark> per feature and no vendor extensions, which is what Google Earth, Google My Maps, QGIS and ArcGIS all read.
Is my file uploaded anywhere?
No. The GPX is read, converted and written entirely inside this page — there is no upload, no queue, no server-side copy and no size limit imposed by a plan. Large files are parsed in a background worker so the page stays responsive. The only action that transmits anything is Open in Studio, and that happens after you sign in and press it.
Is there a limit on file size or number of files?
There is no imposed limit; the practical ceiling is your browser's memory. Files over about 5 MB are handed to a web worker so the interface keeps responding, and you can drop several files at once — each is converted separately and the set can be downloaded as one zip.