Analyze how a body moves
Measure joint angles from any photo or a short video preview — free, no sign-up needed.
- 1 Choose a photo or video
- 2 Get poses on every frame
- 3 Plot any joint angle
Planning a recording?
Pick an activity for a quick camera-placement tip, or upload now.
Tips for best results
- Center the person of interest in the frame.
- Keep the whole body visible — no limbs cut off at the edges.
- Make sure the person stands out clearly from the background, in good light.
- Avoid blurry footage; steady the camera if you can.
- Hard to time a still photo? Record video and screenshot the exact frame you want.
Local video cache
Processed video frames and poses can be cached only in this browser so reopening the same clip is faster. They are not added to your Library.
Checking local cache…
Plain-language result
Your movement snapshot
Measured centre‑to‑centre: from the middle of the bottom
bracket to the middle of the pedal spindle. It is usually printed on
the back of the crank arm. Giving it lets us measure your own leg
length, so any saddle change we suggest is in your millimetres.