What is Outpaint (Expand)?

A first-party Runflow workflow that grows the canvas of an image with AI-generated continuation matching the existing scene. Specify percent-expand for each of the four edges.

How much does Outpaint cost on Runflow?

Simple fixed pricing: $0.55 per image. Higher than basic edits because outpainting is multi-stage (Flux fill + upscaling).

What is the maximum output resolution?

Up to 4096px on the long side after upscaling.

Can I expand only some edges?

Yes. Set per-side values to 0 for edges you don't want to grow. All four values are required.

How long does an outpaint take?

90–180 seconds depending on image size and expand magnitude.

Can I use the outputs commercially?

Yes. Commercial license retained.

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runflow/outpaint

LLMs

Expand the canvas of an image with AI-generated content that matches the existing scene. Specify percent expand on each side — required so the customer is intentional.

$0.55/request 2026-04-28

Playground API Examples

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"outpaint #1 (recommended)"

image_url: https://public.runflow.io/images/models/runflow/outpaint/examples/1/before.webpexpand_top: 10file_input: 10-couple-half-frame.pngexpand_left: 70expand_right: 0expand_bottom: 30

"outpaint #2"

image_url: https://public.runflow.io/images/models/runflow/outpaint/examples/2/before.webpexpand_top: 10file_input: 01-portrait-tight-headshot.pngexpand_left: 30expand_right: 30expand_bottom: 60

"outpaint #3"

image_url: https://public.runflow.io/images/models/runflow/outpaint/examples/3/before.webpexpand_top: 30file_input: 02-product-watch-tight.pngexpand_left: 30expand_right: 30expand_bottom: 30

"outpaint #4"

image_url: https://public.runflow.io/images/models/runflow/outpaint/examples/4/before.webpexpand_top: 0file_input: 04-portrait-shoulder-cut.pngexpand_left: 20expand_right: 20expand_bottom: 70

"outpaint #5"

image_url: https://public.runflow.io/images/models/runflow/outpaint/examples/5/before.webpexpand_top: 25file_input: 05-food-bowl-zoom.pngexpand_left: 40expand_right: 40expand_bottom: 25

"outpaint #6"

image_url: https://public.runflow.io/images/models/runflow/outpaint/examples/6/before.webpexpand_top: 0file_input: 06-cityscape-asymm-crop.pngexpand_left: 50expand_right: 0expand_bottom: 50

"outpaint #7"

image_url: https://public.runflow.io/images/models/runflow/outpaint/examples/7/before.webpexpand_top: 0file_input: 07-portrait-square-platform.pngexpand_left: 60expand_right: 60expand_bottom: 0

"outpaint #8"

image_url: https://public.runflow.io/images/models/runflow/outpaint/examples/8/before.webpexpand_top: 40file_input: 08-bird-perch-tight.pngexpand_left: 40expand_right: 40expand_bottom: 40

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