Start with a photo or video

Measure joint angles from any photo or a short video preview for free, no sign-up needed.

What are you analyzing?

Choose Running or Cycling for a movement snapshot, or Exercise for joint-angle analysis.

Photos stay local. Videos are uploaded only for frame extraction and are not retained. Every frame is analyzed, up to 150 frames per clip.

How to film a useful clip
    1. 1 Choose a photo or video
    2. 2 Review your measurements
    3. 3 Save and compare next time
    Tips for best results
    • Center the person of interest in the frame.
    • Keep the whole body visible with 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…

    What each preset measures

    Running (gait)

    Where the running stats are measured A runner from the bundled side-view clip, with a numbered marker on each joint or segment the Running (gait) preset measures. 1 2 3 4 5 6
    1. 1Arm carriageRight/Left Upper Arm to Forearm
    2. 2Knee flexionRight/Left Thigh to Lower Leg
    3. 3Shank angleRight/Left Lower Leg to Vertical
    4. 4Pelvic dropHip Line to Horizontal · rear view
    5. 5Trunk leanRight/Left Trunk to Vertical
    6. 6Foot strikeRight/Left Foot to Horizontal

    Real pose from the bundled running clip. Pelvic drop is read from a rear view. The rest comes from the side.

    Cycling: road and TT

    Where the cycling stats are measured A rider from a real trainer clip at the bottom of the pedal stroke, with a numbered marker on each joint the cycling presets measure. 1 2 3 4 5
    1. 1Knee flexionRight/Left Thigh to Lower Leg
    2. 2Hip closureRight/Left Trunk to Thigh (hip)
    3. 3Torso angleRight/Left Trunk to Vertical
    4. 4Elbow bendRight/Left Upper Arm to Forearm
    5. 5Ankle angleRight/Left Shank to Foot (ankle)

    Real pose from a trainer clip, at the bottom of the pedal stroke.

    Every angle in a preset is also listed by name in the table below the chart, where you can switch any of them on or off.