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Garmin, Strava and GPS activity files

Online Garmin FIT File Converter and Editor

FIT, GPX and TCX, edited on this device. Heart rate and power stay in the file. No upload, no account, no sign-up.

  • No upload
  • No account
  • Heart rate kept
  • Power kept

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Convert activities between FIT, GPX, TCX, CSV and more.

Private, browser-based Garmin FIT conversion

Convert FIT to GPX and edit activity files right in your browser. There is no upload: your file stays on this device, and recorded heart rate and power are preserved when the output format supports them. Learn about the Garmin FIT SDK or see Strava’s activity export guide.

Browse the FIT file tools hub for readers, converters, and editors, or use the step-by-step FIT file repair guide for a damaged activity.

Have an activity file that will not open?

Garmin watches, bike computers, and fitness apps save activities in FIT, GPX, or TCX files. These formats do not work everywhere: a map may ask for GPX, a spreadsheet needs CSV, and an importer may reject a recording after a transfer problem. Switchback gives you a browser based FIT file converter, reader, and editor so you can make a compatible copy or inspect the data without installing desktop software.

To convert FIT to GPX, choose the original activity file and download the converted track. For a table of timestamps, GPS points, and sensor readings, convert FIT to CSV. If your watch split a ride, use the FIT file combiner to join the recordings in order. Your original files remain unchanged, so you can try another format or import again if the receiving app needs a different type.

FIT files can contain heart rate, cadence, power, temperature, laps, and device details as well as a GPS track. Switchback preserves supported fields when the selected output format can represent them. GPX extensions can carry sensor values, but some apps only read the route; keep the FIT original when you need a complete record of the activity.

Need a shareable GPS track from a Garmin recording? Use the FIT to GPX converter to make a local copy. If a watch split one ride into multiple FIT files, the FIT file combiner can join compatible recordings into one activity.

How it works

  1. Choose the job. Select a converter, editor, reader, or repair tool based on the file you have and the result you need. For a portable route file, open the FIT to GPX converter; for a watch recording split into parts, use the FIT file combiner.
  2. Open your local file. Drop a FIT, GPX, TCX, or supported export file into the matching tool. For a multi-file job, add all parts and arrange them in activity order.
  3. Review the options. Confirm the output format and any edit settings. Each page explains which activity fields can be preserved or changed.
  4. Process and download. Switchback works in your browser and gives you a new file to import or analyze. Your source file stays unchanged on your device.

Choose a tool for your activity file

FIT converters

Convert Garmin activities to formats that are easier to share, map, or analyze. Start with the FIT file converters to convert FIT to GPX, TCX, CSV, JSON, or KML, or use the dedicated FIT to GPX converter for a portable activity track.

FIT editors

Change a recording when its time, sport, device details, or sensor fields need attention. Browse the FIT file editors for focused fixes, or open the FIT file combiner to join recordings split by a watch or transfer.

GPX tools

Work with GPS tracks by merging, trimming, or splitting route files in your browser. See all GPX tools, including the GPX to TCX converter for apps that request Training Center XML.

Use the converted file with your apps

Garmin Connect and Strava support activity file workflows, but the formats and fields each app accepts can vary by import method. Download the converted file first, then use the service’s activity import flow and review the resulting activity. If you only need a route line, GPX is often convenient; if you need more of the recorded session, retain the original FIT.

A conversion cannot invent data that was absent from the source. A ride without GPS may still have time and indoor sensor values, while a route-only GPX may not have heart rate or power. Switchback reports or preserves what it can read and keeps the work local, giving you a practical way to move activity data between compatible tools.

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Questions

How do I convert a .fit file?

Open a FIT file converter, choose the original .fit or .fit.gz file, and start the conversion. Download the GPX, CSV, or other selected format when processing finishes. Switchback converts the activity in your browser, so the original stays unchanged on your device.

Which is better, GPX or FIT?

Neither format is best for every job. FIT is compact and can hold detailed activity records, laps, and sensor fields; GPX is widely supported for GPS tracks and route sharing. Choose FIT when you need activity detail, and GPX when you need a portable track or map file.

Does converting FIT to GPX preserve heart rate and power?

Switchback writes heart rate, power, cadence, and temperature into GPX extensions when those fields are present and supported in the source. Some apps ignore optional GPX extensions, so a track may open without its sensor data. Keep the original FIT as your complete activity archive.

How do I combine split FIT recordings?

Select the FIT recordings in activity order, check their order, and run the FIT file combiner. It joins the record streams into one FIT activity with a continuous timeline. The original files remain unchanged, and you can review the merged download before importing it as a new activity.

Are my activity files uploaded to Switchback?

No. Switchback processes files in your browser without sending activity data to a conversion server, and you do not need an account. Your GPS track and sensor values stay on your device while the tool runs. The finished result is saved through your browser’s normal download flow.