SMARTFIT BY TOOLMITRAA
FIT, GPX, TCX, CSV and JSON Activity Converter
Use SmartFIT to move activity data between common fitness-file formats while checking timestamps, GPS, distance, laps and sensor streams before export.
Activity interchange tools
- FIT to GPX, TCX, CSV and JSON
- GPX or TCX to editable SmartFIT project
- Multiple-file chronological merge tools
- FIT integrity checks before export
- Device and sensor metadata inspection
FIT remains the richest source when available
GPX is excellent for route geometry, while FIT can preserve richer device, lap, timer and sensor information. When the same activity is available in several formats, SmartFIT can treat them as companion evidence rather than adding their distances together.
Frequently asked questions
Which source should I use for editing?
Use the original FIT when available because it normally contains the richest activity and device data. Use GPX as a geometry source or when FIT is unavailable.
More SmartFIT tools
FIT Tools Suite · FIT File Editor · FIT File Repair · Smart FIT Generator · Cycling Activity Generator · Running Activity Generator · Cycling Route Builder · GPX to FIT · FIT Converter · Activity Analyzer · Activity Library · Athlete Twin · Personal Heatmap · Interactive Route Planner · Blog