Convert Garmin Training Center XML (.tcx) activities and courses from Garmin Connect, Strava, and Wahoo into standard RFC 7946 GeoJSON in your browser. 100% private with zero server uploads.
Detailed side-by-side format architecture for TCX Document (.tcx) and GEOJSON Document (.geojson). Every conversion executes strictly within isolated browser memory without network transit.
Drag and drop your .tcx file onto the working surface or use the system file dialog. File magic bytes are verified locally on device.
Select a quality preset (Lossless, Visually Lossless, Balanced, Smallest) or adjust advanced encoding switches in the options panel.
Click CONVERT to execute local WebAssembly compilation. Save the finished .geojson directly to local storage, or stage it for chaining.
Prefer local shell scripting? Run this standard POSIX command on your machine to achieve equivalent transcoding without a web interface:
# Convert TCX to GEOJSON locally
pandoc input.tcx -o output.geojsonWorking with files across multiple web pages? The official convrtr Chrome Extension adds native Side Panel docking, right-click context menu media extraction, and visible viewport capture. Powered by the same zero-upload client-side WebAssembly engine.
TCX (Training Center XML) is Garmin's fitness exchange format. Unlike generic GPS formats, TCX structures outdoor workouts into distinct laps, sports (Biking, Running), and records rich biometric telemetry including heart rate (BPM), pedaling cadence (RPM), cycling power (Watts), and course points.
GPX focuses primarily on raw latitude, longitude, and elevation waypoints and tracks. FIT is a binary compressed format used on modern Garmin head units. TCX is a human-readable XML format specifically designed for athletic workout analysis and training intervals.
convrtr preserves 3D coordinates [longitude, latitude, elevation], workout lap splits, heart rates, cadences, power wattage, speeds, and timestamps directly in standard GeoJSON geometries and coordinateProperties arrays.
Never. All XML parsing, telemetry aggregation, and GeoJSON synthesis are executed entirely client-side in your browser memory. Your sensitive coordinates never leave your device.
TCX Document (TCX) and GEOJSON Document (GEOJSON) serve distinct roles across the digital workflow. Converting to GEOJSON provides optimized compatibility, modern compression efficiency, or standardized playback across web browsers, operating systems, and media production environments.
The output format (GEOJSON) is inherently lossless or supports lossless operation. Your original visual or audio fidelity is mathematically preserved without quantization artifacts.
Never. convrtr is architected with a strict zero-upload model. All processing, decoding, decompression, and encoding happen 100% locally on your machine using sandboxed WebAssembly and Web Workers. Your data never touches an external server, database, or analytics collector.
You can execute this conversion locally via command-line utilities such as ffmpeg, cwebp, or ImageMagick. For example: see the developer terminal recipe provided in the technical specifications dossier above. convrtr provides the identical local-first capability directly inside your browser without installing CLI packages.
Yes. You can drop multiple .tcx files into the instrument to process them concurrently in browser Web Workers, or click 'Open in Master Studio' to queue mixed formats, configure individual targets, and export as a single ZIP archive.
Convert web media, local files, and document assets directly in Chrome Side Panel using client-side WebAssembly, zero-server uploads, and the official convrtr browser extension.
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