Keep the whole video visible
The canvas surrounds the complete source, so people, products and existing captions stay inside the frame. Drag one side or several sides outward. The checkerboard marks the new area around your video; it is not generated scenery.
Resize without stretching or distortion
Width and Height change the outer canvas while the original picture keeps its dimensions and proportions. Preview zoom only changes how large the workspace looks on your screen. It does not change the saved canvas size or stretch the video.
Set a custom video size without a ratio preset
Use a wider, taller or asymmetric canvas without choosing 16:9 or 9:16 first. Enter exact dimensions or drag the four edges independently. If your destination needs a standard format or several versions, use the Aspect Ratio Changer.
Choose standard video formatsPadding, background blur or AI expansion
A solid background and a blurred duplicate can fill unused space without inventing a scene. Outpainting creates new scenery instead. Use the editor to compose the expanded canvas and compare it with your original.
Explore AI video outpainting