Outpaint (Aspect Ratio)

Expand the canvas of an image to a target aspect ratio (e.g. 16:9, 1:1, 9:16). The model decides where to add content — no need to specify per-side expand percentages.

By Runflow

Pricing: $0.55 per request

Examples

• Source 9:16 (gen idx 2)
• Source 9:16 (gen idx 8)
• Source 21:9 (gen idx 10)

Related models

• Multi Angles, Re-render the same subject from a different camera angle. Pick a horizontal view, a vertical angle, and a shot distance: the model rotates the camera around the subject and re-renders the scene from that pose.
• Logo Inpaint, Place a logo onto a target image, with optional mask to constrain placement. When the mask is omitted, the workflow picks a placement automatically.
• Background Replace, Swap the background of any product photo for a new scene defined by a reference image and a short prompt. The model preserves the foreground subject while matching camera angle and lighting to the new background.
• Reference Inpaint, Inpaint a region of a target photo using a reference image as the visual guide. Provide the target, a black-and-white mask of the area to fill, and a reference image. The model paints the masked region with content matching the reference.

Discoverable surfaces

• Dispatch endpoint: POST https://api.runflow.io/v1/models/outpaint/aspect-ratio/runs
• Agent skill (start here): https://www.runflow.io/.well-known/agent-skills/runflow/SKILL.md