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fitbit / google health → garmin connect · free

Fitbit to Garmin Converter

Your Fitbit history, converted for Garmin Connect.

Upload supported Google Takeout files and get Garmin-ready .fit or .csv output.

Quick Start

Start a conversion

Convert weight dataWeight history.FITConvert steps dataDaily totals · check dates.CSVConvert heart-rate dataHeart-rate history.FIT

Google sign-in required.

Free. Funded by coffees, not your data.

See how it works in under 30 seconds

Watch

How it works

Three steps, about ten minutes of your attention — most of it spent waiting on Google.

Google Takeout.jsonTrackerSync.fit / .csvGarmin Connect
Your files never take a detour: Takeout, converter, Garmin Connect.
  1. 01

    Export from Google Takeout

    Request your Fitbit archive at takeout.google.com. Google emails a ZIP when it's ready (often a day or two).

    First export? Follow the checklist for how to export Fitbit data with Google Takeout.

  2. 02

    Convert here

    Upload the JSON files from the archive. TrackerSync finds the right ones and returns Garmin-ready .fit and .csv files.

  3. 03

    Import to Garmin Connect

    Upload the output in Garmin Connect's Import Data screen. We show you exactly which option to pick.

What actually lands in Garmin Connect

Garmin only accepts a narrow set of imports. Here's the honest picture before you start.

importsWeight, BMI and body fat · daily steps, distance, calories and floors
convertsHeart-rate history — we produce valid .fit files, but Garmin's importer may decline them
stays putSleep stages and badges — Garmin doesn't import these from any tool, and imported history won't feed your training load

Keep TrackerSync free

Built by one person, funded by coffees.

TrackerSync has no subscription and doesn't resell your data. A coffee covers about a month of hosting; a sponsorship keeps it running year-round.

Support meSponsor on GitHub

Entirely optional. The free converter stays free either way.

TrackerSync FAQ hub

Answers are product-first and include steps, expected results, failure modes, fixes, and measurement guidance.

Getting your Fitbit data (Google Takeout)Conversions and output formatsGarmin import behaviorCommon errors and debuggingLimits, speed, and reliability

Getting your Fitbit data (Google Takeout)

How do I export Fitbit data from Google Takeout for TrackerSync?

Use Google Takeout and include Fitbit data. Download the export as a .zip, then extract it and upload measurement JSON files such as weight-2025-11-11.json.

Steps

  1. Open takeout.google.com and select only Fitbit.
  2. Choose export once and file type .zip.
  3. Download the archive when Google emails you.
  4. Extract the archive locally and open the Fitbit folder.
  5. Upload matching JSON files in TrackerSync.

Common failure modes and fixes

  • Uploading the .zip directly.

    Fix: Extract first; upload individual JSON files.

  • No Fitbit product in Takeout.

    Fix: Confirm Fitbit is linked to the same Google account and regenerate Takeout.

Which of the thousands of files do I actually upload?

Upload measurement-matching JSON files: weight-YYYY-MM-DD.json for Weight, steps-YYYY-MM-DD.json for Steps, heart_rate-YYYY-MM-DD.json for Heart Rate, and equivalent files for other tabs.

Steps

  1. Extract Takeout.
  2. Filter by filename prefix.
  3. Open one file to verify it matches the measurement.
  4. Upload only matching files per converter tab.

Common failure modes and fixes

  • Mixed measurement files uploaded together.

    Fix: Run one measurement type per conversion batch.

  • Edited JSON fails validation.

    Fix: Use original unmodified Takeout files.

Should I export all years at once or split Fitbit Takeout by date range?

If your history is large, split migration into date ranges. You can still use one Takeout export, but import to Garmin in staged windows.

Steps

  1. Export once from Takeout.
  2. Organize files by month or quarter.
  3. Convert/import one range.
  4. Verify, then continue with next range.

Common failure modes and fixes

  • Single giant migration is hard to verify.

    Fix: Use staged date ranges and checkpoints.

  • Lost track of what is imported.

    Fix: Maintain a date-range checklist.

My Takeout arrived as multiple .zip files. Can I still use TrackerSync?

Yes. Extract each archive and combine matching measurement files into one working folder before conversion.

Steps

  1. Extract all Takeout zip parts.
  2. Merge measurement files into one folder by type.
  3. Check for duplicate filenames by date.
  4. Upload in ordered batches.

Common failure modes and fixes

  • Only first zip extracted.

    Fix: Extract every archive part from Google Takeout.

  • Duplicate files conflict.

    Fix: Deduplicate by filename/date before upload.

Can I still get my Fitbit data after July 15, 2026?

The July 15, 2026 Fitbit account-transition deadline has passed. Account recovery and available data now depend on your account status and Google’s current process. Review Google’s official guidance for the options shown to you, and export any data that remains available through Google Takeout.

Steps

  1. Sign into the Google Account connected to Fitbit.
  2. Review Google’s current Fitbit account-transition guidance.
  3. Open Google Takeout and check which health data is available.
  4. Download and extract any archive Google makes available.

Common failure modes and fixes

  • Assuming every legacy record was deleted.

    Fix: Availability depends on account status; use Google’s current support flow as the source of truth.

  • Using the wrong Google Account.

    Fix: Confirm the account connected to your Fitbit history before opening Takeout.

Conversions and output formats

What does TrackerSync output (.FIT or CSV)?

Most converters output Garmin-compatible .FIT files. Steps can use a CSV path for Garmin Connect Fitbit import workflows.

Steps

  1. Choose measurement tab.
  2. Upload matching files.
  3. Run conversion.
  4. Check downloaded extension (.fit or .csv).

Common failure modes and fixes

  • Expected .FIT but Steps produced CSV.

    Fix: Steps supports CSV-based Garmin Fitbit import flow; confirm import route first.

  • Manual rename breaks import.

    Fix: Do not change generated extensions.

Why do some imported days look shifted by one day?

TrackerSync preserves Fitbit timestamps, but Garmin day grouping depends on account timezone and daylight-saving context at import time.

Steps

  1. Verify Garmin timezone.
  2. Convert a 1-3 file sample.
  3. Import sample and compare dates with Fitbit source.
  4. Proceed with full batch after alignment.

Common failure modes and fixes

  • Entries appear one day early/late.

    Fix: Adjust Garmin timezone and retest with a small sample.

  • Midnight totals differ.

    Fix: Compare source timestamps; platform day cutoffs can differ.

What does partial success mean after conversion?

Partial success means some files converted and some failed. TrackerSync reports failed filenames and errors so you can retry only those files.

Steps

  1. Review failed file list in result panel.
  2. Download successful output files.
  3. Fix or replace failed input files.
  4. Retry failed files separately.

Common failure modes and fixes

  • Retrying entire batch creates duplicate imports.

    Fix: Retry only failed files.

  • Error list ignored.

    Fix: Use per-file error messages to correct source issues first.

Garmin import behavior

What will show in Garmin Connect after import, and what might not?

Imported raw measurements should appear in the relevant Garmin history views. Derived metrics can depend on Garmin recalculation rules and device signals.

Steps

  1. Import one sample file.
  2. Check timeline history for that metric.
  3. Check derived score cards separately.
  4. Then batch import remaining files.

Common failure modes and fixes

  • History appears but advanced scores do not backfill.

    Fix: Depends on Garmin feature logic; imported history does not guarantee every computed score.

  • Import accepted but not visible yet.

    Fix: Wait for Garmin processing and refresh app/web.

How do I avoid duplicate Garmin entries during batch imports?

Import by date-range batches and keep a checklist so the same files are not imported twice.

Steps

  1. Create date-range checklist.
  2. Import one range at a time.
  3. Mark completed ranges.
  4. Move completed files to a separate folder.

Common failure modes and fixes

  • Retrying unknown batch causes duplicates.

    Fix: Check Garmin timestamps before re-importing same files.

  • Files mixed after extraction.

    Fix: Separate pending and completed folders.

Where do I import converted files in Garmin Connect?

Use Garmin Connect import/upload interfaces for the target metric. The exact path can differ between web and app versions.

Steps

  1. Open Garmin Connect web first.
  2. Find the import/upload entry point for your metric.
  3. Upload one sample output file.
  4. Verify visibility before bulk import.

Common failure modes and fixes

  • Using wrong Garmin section.

    Fix: Switch to measurement-specific import flow.

  • Mobile app path differs from web.

    Fix: Prefer web import when troubleshooting.

Will imported Fitbit history feed my Garmin training load or VO2 Max?

No. Garmin computes training load, VO2 Max, Training Readiness, Body Battery, and race predictions only from data your Garmin watch records directly while worn. Imported historical data is stored as history but never feeds those algorithms. This is a Garmin design decision, not a TrackerSync limitation.

Steps

  1. Import your history for the record and for charts/trends.
  2. Wear your Garmin device to build the metrics Garmin computes itself.
  3. Expect VO2 Max and training-load figures to start from your own Garmin activities, not from Fitbit history.

Common failure modes and fixes

  • Expecting imported data to unlock training guidance immediately.

    Fix: It will not — those metrics come only from watch-recorded data.

  • Assuming a missing VO2 Max means the import failed.

    Fix: Garmin simply does not derive VO2 Max from imported files.

Common errors and debugging

Why does validation fail before conversion starts?

Validation fails when file structure does not match the selected converter, files are incomplete/corrupted, or required fields were changed.

Steps

  1. Read per-file validation error.
  2. Confirm converter tab matches file type.
  3. Retry with original Takeout file.
  4. Test with a small batch to isolate bad files.

Common failure modes and fixes

  • Wrong tab for file type.

    Fix: Switch to matching measurement tab.

  • Edited JSON changed schema.

    Fix: Use untouched Takeout exports.

  • Partial/corrupt download.

    Fix: Re-download and re-extract Takeout.

What should I do if TrackerSync asks me to try again later?

Wait for the time shown in TrackerSync, then try again with fewer files. Contact support if the message keeps returning.

Steps

  1. Pause and note the suggested time.
  2. Wait until then.
  3. Try again with fewer files.
  4. Contact support if the issue continues.

Common failure modes and fixes

  • Trying again immediately.

    Fix: Wait for the suggested time before continuing.

  • The same message returns.

    Fix: Use fewer files or contact support.

What should I do if a conversion does not finish?

Refresh the page and try again with fewer files. Keep any completed downloads before starting the next group.

Steps

  1. Refresh the page.
  2. Try again with a few files.
  3. Continue in small groups.
  4. Keep completed downloads before the next group.

Common failure modes and fixes

  • A large group does not finish.

    Fix: Use fewer files on the next attempt.

  • The page has been open for a long time.

    Fix: Reload it and select the files again.

Limits, speed, and reliability

What batch size gives the best reliability?

Small to medium batches are more reliable than very large uploads. Start small, verify, then scale gradually.

Steps

  1. Convert a small sample batch.
  2. Measure completion reliability.
  3. Increase gradually only if stable.
  4. Keep consistent batch pattern through migration.

Common failure modes and fixes

  • A very large group does not finish.

    Fix: Split it into smaller date ranges.

  • You need to try again.

    Fix: Use fewer files so the next attempt is quicker.

Which measurement converters are live vs beta today?

Use homepage converter cards: Live means production-ready, Beta means available with potential limitations. Always run a sample import first.

Steps

  1. Check Live/Beta badges on homepage.
  2. Open the measurement page.
  3. Run sample conversion and import.
  4. Proceed with full history only after verification.

Common failure modes and fixes

  • Assuming all metrics have identical support.

    Fix: Validate each measurement independently.

  • Beta output expectations too high.

    Fix: Pilot with a small range before full import.

Is there a practical max file count per run?

The UI supports multi-file uploads, but practical reliability is better with moderate batches. Use staged imports instead of one massive run.

Steps

  1. Start with 5-20 files.
  2. Observe validation/conversion behavior.
  3. Increase only if stable.
  4. Stop increasing when failures appear.

Common failure modes and fixes

  • Pushing very high file counts causes instability.

    Fix: Return to smaller repeatable batches.

  • Different metrics behave differently.

    Fix: Tune batch size per measurement.

What is the safest end-to-end migration checklist?

Use a repeatable workflow: export, validate sample, convert in batches, import sample, then scale.

Steps

  1. Export and extract Takeout.
  2. Run sample conversion.
  3. Import sample in Garmin and verify.
  4. Batch-convert remaining history.
  5. Keep a date-range checklist throughout.

Common failure modes and fixes

  • Skipping sample validation.

    Fix: Always validate with a small date range first.

  • No tracking of imported ranges.

    Fix: Maintain a simple migration log.

Helpful external resources

Use these official links to export, manage, and import your health data across Google, Fitbit, and Garmin services.