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FIT to KMZ converter, without the upload.

Turn FIT activities into KMZ. It is converted in your browser, so the file never leaves your device.

Drop FIT files here

or choose from your computer paste with Ctrl V

Ready · other file types work too0 bytes uploaded, ever

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How to convert FIT to KMZ

  1. Add your FIT activities

    Drop FIT files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.

  2. KMZ is already chosen

    Press Convert. There is nothing else to set. The work happens in this tab.

  3. Download

    Save the KMZ, or download everything as one ZIP if you converted several files.

Why ToAny

  • Private by construction

    The FIT to KMZ converter is part of this page and runs inside your browser. Your activities are never sent to ToAny or to anyone else.

  • No upload, no queue

    Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.

  • Free, without an account

    No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.

FIT to KMZ: what to expect

FIT is binary, so map tools and text editors cannot read it. KMZ bundles a map with its icons and images in one file. FIT is at home in workouts recorded by sports watches and bike computers; KMZ is the usual choice for KML with its icons and overlay images in one file.

Every format is read into plain GeoJSON features and written out from there, so coordinates, names and properties carry over wherever the target has a place for them. Only recordings with GPS positions can be converted; an indoor workout with no route is refused. Time and elevation are kept. Heart rate, cadence and power are not written, because KMZ has no standard place for them; choose GeoJSON or CSV to keep them. Altitude and per-point timestamps are kept; a line with timestamps is written as a Google Earth track that can be played back. The KML is zipped as doc.kml, the name Google Earth expects.

FIT vs KMZ

FIT

Garmin FIT activity

FIT is the binary format Garmin watches and bike computers write for every activity. It is compact and carries sensor data such as heart rate, cadence and power alongside the GPS track. Wahoo, Zwift and many other devices use it too.

Opens in Garmin Connect, Strava, TrainingPeaks and most fitness platforms; not map tools

FIT converter
KMZ

KMZ map file

A KMZ is a ZIP archive containing a KML file, normally named doc.kml, and the icons and images it uses. Google Earth saves a placemark collection as KMZ so that the pictures travel with it.

Opens in Google Earth, Google My Maps, QGIS and most GIS tools

KMZ converter
FIT compared with KMZ
FITGarmin FIT activityKMZKMZ map file
Stands forFlexible and Interoperable Data TransferZipped Keyhole Markup Language
TypeFitness activity dataGeographic data (zipped)
CompressionCompact binaryLossless (a ZIP containing KML)
Introduced2008, by Garmin (Dynastream)The mid-2000s, by Google
Opens inGarmin Connect, Strava, TrainingPeaks and most fitness platforms; not map toolsGoogle Earth, Google My Maps, QGIS and most GIS tools
Best forWorkouts recorded by sports watches and bike computersKML with its icons and overlay images in one file
File extension.fit.kmz

Questions

Are my activities uploaded anywhere?

No. The FIT to KMZ conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.

Is anything lost when converting FIT to KMZ?

The values are kept. Anything KMZ has no way to express, such as formatting, formulas or nesting, is simplified or left out.

Can I convert several FIT files at once?

Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.

How do I convert FIT to KMZ on Windows, Mac, iPhone or Android?

The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the FIT file, press Convert and save the KMZ. There is nothing to install.

Is there a file size limit?

Yes. Files up to 200 MB are accepted; a larger file is refused with a message. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.