FLUX Outpainting: Black Forest Labs extends an image to any ratio without seams

Black Forest Labs releases FLUX Outpainting, a FLUX.2 [klein] API tool extending images to any ratio without seams or prompts starting at $0.014.

Black Forest Labs releases FLUX Outpainting, an image extension feature that addresses common outpainting issues at the model level: lighting discontinuities at edges, texture inconsistencies, and visible seams at junctions. The tool takes an image and the geometry of a target canvas (width × height) as input, then completes the scene while preserving lighting, perspective, and texture continuity, without requiring a prompt.

The feature relies on FLUX.2 [klein], the fast, open-weight model released by BFL under an Apache 2.0 license, and charges starting from $0.014 per image via the API. Requests are made via the asynchronous endpoint `POST /v1/flux-tools/outpainting-v1`: the source image is transmitted in base64, along with the final dimensions and, optionally, reference offsets to shift the original onto the new frame or enable automatic cropping. The result is retrieved via a signed link valid for approximately ten minutes.

A demonstration is available at flux-tools.bfl.ai/outpainting and detailed documentation at docs.bfl.ai/flux2/fluxoutpainting.