Pick a scene
Start with Ring escape, Rotating hexagon, Split on every bounce or any of the 12 scenes. The preview plays right away.
Bouncing Ball Simulator
Drop balls into spinning rings, polygons and shrinking circles. Every bounce plays a note, splits a ball or breaks a ring. Pick one of 12 scenes, tune the physics and export a 1080p video with sound in seconds.
Open Bouncing Ball Simulator →How to make a bouncing ball video
Make it yours
Change the rings, gaps, spin, gravity, balls, effects, colours and the notes. Press Randomise for a new run with the same settings.
Export the video
Choose 9:16, 1:1 or 16:9, the length and frame rate, then export an MP4 with sound and download it.
Tips for a great clip
Try a few seeds
Randomise gives the same scene a different run. Keep pressing it until the first seconds look exciting, then export.
Loop the preview
With Loop on, the preview restarts at your video length, so you see exactly what the file will show.
Vertical for phones
9:16 at 1080 × 1920 fills a phone screen. Add a short title such as “Will it escape?” and a counter.
Keep bounciness at 1
Perfectly elastic bounces keep the ball moving forever. Lower it for scenes that should settle down.
60 fps for fast balls
Fast balls and long trails look smoother at 60 fps. Use the 540p preview to check a long run quickly.
Share the scene
Copy scene link saves every setting and the seed in a link, so anyone can replay the same run.
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Bouncing ball simulator FAQ
What is the bouncing ball simulator?
A free tool that simulates balls bouncing inside rings and shapes with real 2D physics. Each bounce can play a note, split the ball, make it grow or speed up, or break a ring, and you can export the result as a video with sound.
How do I make a satisfying ball video?
Pick a scene, change the settings until you like the run, open Export, choose 9:16 for a vertical video, set the length and press Export video. Download the MP4 when it is ready.
Is it free?
Yes. No sign-up, no watermark and no limit on how many videos you export. Everything runs in your browser.
Which video formats can I export?
MP4 with H.264 video and AAC sound, or WebM with VP9 and Opus where MP4 is not available. Sizes are 1080 × 1920 (9:16), 1080 × 1080 (1:1) and 1920 × 1080 (16:9), plus a 540p quick preview, at 30 or 60 frames per second.
Will the video look like the preview?
Yes. The simulation is deterministic: the same settings and seed always give exactly the same run. The video replays it frame by frame with the same drawing, so timing is exact even on a slow computer.
Where does the music come from?
Every note is synthesised in your browser from the bounces: a scale, random notes from a scale, or a public-domain melody such as Ode to Joy, Für Elise, Canon in D or Morning Mood. You can also export without sound.
Can I change the physics?
Yes: gravity, bounciness, friction, ball size, start speed, number of balls, ball-to-ball collisions, ring spin, gaps, shrinking and more. Changes restart the run so it stays reproducible.
Can I share a scene?
Copy scene link puts every setting and the seed into a link. Opening it shows the same scene and the same run.
Does it work on a phone?
Yes. The preview and all settings work on phones and tablets. Exporting long 1080p videos is quickest on a computer.
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