What Fitbit files should I upload?
Upload individual files named weight-YYYY-MM-DD.json from the Global Export Data folder. Extract the Google Takeout ZIP first; do not upload the ZIP itself.
Move Your Fitbit Weight History to Garmin Connect
Convert Fitbit weight JSON files from Google Takeout into FIT files for Garmin Connect—no scripts or command line.
How to move your Fitbit weight history
Export from Fitbit
Open Google Takeout, select Fitbit, and request a ZIP archive. Download and extract it when Google says it is ready.
Choose your weight files
Open the Fitbit Global Export Data folder and select up to 3 files named weight-YYYY-MM-DD.json. Do not upload the ZIP.
Convert and import
Download the generated FIT files, then use Garmin Connect's Import Data feature. Test one file before importing the rest.
Upload Fitbit Weight Files
Sign in to start converting
Google sign-in identifies your TrackerSync account and helps apply fair usage limits.
TrackerSync receives your name and email only.
It does not access Google Drive, Fitbit, or your Google Takeout archive.
Sign in with GoogleStart with one small file. Once you have checked the result, you can convert up to 3 files per batch.
Quick Answer
TrackerSync turns Fitbit weight JSON exports into Garmin FIT weight files. Sign in, upload up to 3 weight-YYYY-MM-DD.json files, and download the converted files. TrackerSync carries across the recorded date, time, weight, and valid body-fat value. Garmin Connect decides whether each file is accepted.
Key Features
- Fitbit weight JSON to Garmin FIT conversion
- Up to 3 files per batch
- Recorded dates and times retained
- Automatic kg or lb detection—review a small sample
- Body-fat percentage included when valid and present
- No scripts or command line required
Related FAQ
See product troubleshooting and import behavior in the homepage FAQ hub.
About this converter
Use the original weight-YYYY-MM-DD.json files from the Global Export Data folder in your extracted Fitbit archive.
TrackerSync automatically estimates whether the exported values use kilograms or pounds. Because some weight ranges are ambiguous, check a small sample in Garmin Connect before converting more files.
The converter reads the recorded weight, date, time, and valid body-fat percentage. It does not invent BMI, muscle mass, or other body-composition measurements that are missing from the Fitbit export.
TrackerSync creates a valid FIT weight file, but Garmin Connect controls the final import and may handle optional body-composition fields differently.
Still need the archive? Start with how to export Fitbit weight data with Google Takeout, then come back with the weight-YYYY-MM-DD.json files.
Frequently asked questions
How do I export weight data from Fitbit?
Open Google Takeout with the Google account connected to Fitbit, select Fitbit, and request a one-time ZIP export. Download and extract the archive when Google notifies you that it is ready.
How long does a Google Takeout export take?
Preparation time varies with the size of the archive and Google's processing. Wait for Google's notification rather than requesting multiple duplicate exports.
Does the converter support kilograms and pounds?
Yes. TrackerSync automatically estimates whether the source values use kg or lb and writes the weight into the FIT format. Check one converted file first because some value ranges can be ambiguous.
Will body-fat measurements be included?
Valid body-fat percentages are included when they are present in the Fitbit record. TrackerSync does not create body-fat or other measurements that are missing.
What should I do if Garmin Connect rejects the file?
Confirm that you selected a weight-YYYY-MM-DD.json file and use Garmin Connect's Import Data feature rather than its activity-upload screen. Test one converted file at a time.
Can I use the converter for free?
Yes. TrackerSync is free to try. Google sign-in is required, and usage limits help keep the service available.