# ProSwing - AI Baseball Swing Analyzer

> Turn any phone or webcam into a swing analysis lab. No sensors. No expensive hardware. 100% local and private.

## What is ProSwing?

ProSwing is a free, browser-based baseball and softball swing analysis tool that uses AI-powered computer vision to provide elite-level biomechanical insights. It runs entirely in the browser — no data ever leaves the user's device.

## Key Features

- **MediaPipe Pose Detection**: 33 body joint landmarks tracked at 30+ FPS via WebAssembly
- **Hip-Shoulder Separation (HSS)**: Vector dot product kinematic sequence analysis
- **Pelvic Angular Velocity**: 5-frame moving average low-pass filtering
- **Attack Angle**: Lead arm atan2 computation from skeletal tracking
- **Estimated Bat Speed**: Wrist velocity with pixel-to-mph calibration
- **xContact Probability**: Matched to Statcast pitch variables (sinkers, sweepers, spin rates)
- **Drill Recommendations**: Driveline hitting drills based on biomechanical anomaly detection
- **Live Webcam Mode**: Real-time skeleton overlay and swing event detection
- **100% Private**: All processing happens locally in the browser — nothing is uploaded

## How It Works

1. **Upload or Record** — Upload a video (MP4, MOV, AVI up to 500MB) or use the live webcam
2. **AI Pose Detection** — MediaPipe tracks 33 joint landmarks through the swing
3. **Biomechanical Analysis** — Calculates hip-shoulder separation, pelvic angular velocity, attack angle, bat speed, and swing length
4. **Review Metrics & Drills** — Get swing quality score, matchup diagnostics, and personalized drill recommendations

## Pricing

Free. No account required. Open source.

## Technology

- Browser-based with WebAssembly
- MediaPipe Tasks Vision for pose detection
- React 19 with Next.js 16
- TypeScript
- Tailwind CSS
- Runs entirely client-side (no server-side processing)

## Links

- Website: https://proswing.net
- Blog: https://proswing.net/blog/science-of-perfect-baseball-swing
- Sitemap: https://proswing.net/sitemap.xml

## Contact

For questions about ProSwing, visit https://proswing.net