Visualize and analyze cycling FIT files directly in VS Code.
FIT Visualizer builds a local ride database and gives you fast charts, route maps, ride comparisons, heart-rate zones, and AI-assisted activity analysis.
Highlights
Open FIT files in a custom visual editor
Auto-index rides into local SQLite storage
Compare two activities in one view
View speed, heart rate, and altitude by distance
Render GPS track on an interactive map
Save dated heart-rate zone profiles
Generate analysis from current and historical rides
Quick Start
Open the folder that contains your FIT files.
Run FIT: Index New Files.
Open a FIT file or run FIT: Browse Loaded Data.
(Optional) Configure Heart Rate Zone Profile.
Click Analyze Activity.
Commands
FIT: Visualize File
FIT: Browse Loaded Data
FIT: Index All Files
FIT: Index New Files
FIT: Index This File
FIT files also include Explorer context-menu actions.
Heart-Rate Zones
Supports dated zone profiles
Auto-calc uses sex, age, resting HR, and observed max HR
