SwingClips: Free, Open-Source Swing Review for Your Sim

One of the quiet frustrations of practicing in a home golf simulator is reviewing your swing. Scrubbing through a long video to find each shot, trimming clips by hand, and lining up slow-motion playback eats into the time you'd rather spend hitting balls. SwingClips is a free, open-source web app built to solve exactly that.

Created by developer Danny2p and hosted at swing.garage.golf, SwingClips takes a recording of your hitting session and automatically slices it into clean, perfectly trimmed clips — one for every shot. From there you can play in slow motion, step frame-by-frame, draw overlays, and share annotated clips. Best of all, it runs entirely in your browser and costs nothing.

How It Works

Feed SwingClips a video of your practice session and it detects each individual shot, trimming the footage into bite-sized clips so you never have to scrub a timeline again. Each shot becomes its own reviewable clip, ready for analysis the moment your session ends.

The app is designed to work best indoors in a quiet setting — the kind of controlled environment most garage and basement simulator setups already provide. That makes it a natural companion to a home bay where you're banging balls into a screen with consistent lighting and minimal background noise.

Review Tools That Matter

Once your clips are sliced, SwingClips gives you the review tools you'd expect from a paid swing-analysis package — without the price tag.

• Slow-motion playback to study tempo and transition.
• Frame-by-frame stepping to nail the exact moment of impact or the top of the backswing.
• Drawing overlays to mark swing plane, spine angle, and alignment lines.
• Sharing clips with your drawings baked in, so you can send them to a coach or buddy.

Offline and Open Source

SwingClips is a Progressive Web App (PWA), which means you can save it to your home screen and run it locally — even offline. Your session footage stays on your device, and you don't need a connection to slice and review clips, which is ideal for a garage setup tucked away from solid Wi-Fi.

Because the project is open source and hosted on GitHub, you can dig into the code, extend it to fit your own workflow, or contribute improvements. There's no subscription, no account wall, and no upsell — just a tool built by a fellow DIY golfer for the community.