Fitbit's export is thousands of tiny JSON files, and Google starts deleting unmigrated Fitbit data on July 15, 2026. Upload your ZIP to get one wide daily CSV — a column per metric — plus a coverage report. Everything runs in your browser.
The whole Fitbit/Takeout ZIP, or a single metric JSON.
Google begins permanently deleting Fitbit-account data that was never migrated on July 15, 2026. If you export now, this tool turns the pile of JSON files into a spreadsheet you can keep forever.
No. Your ZIP is read and combined entirely in your browser. Nothing is sent to Missing Features.
The common per-day JSON metrics such as steps, calories, distance, and heart rate. Additive metrics are summed per day; rate metrics like heart rate are averaged. Each metric becomes its own CSV column.
This version focuses on the day-value metric files. Structured sleep and exercise files use different schemas and are skipped, counted in the coverage report.