Why FLUX.2 Klein 4B for Image Outpainting?
FLUX.2 Klein 4B is highly reliable for extending image borders while keeping the original style, lighting, and perspective intact. It’s lightweight, runs well on consumer GPUs, and works smoothly with simple “pad → edit” workflows in tools like ComfyUI. With support for masks and specialized outpaint LoRAs, it can naturally invent new backgrounds, architecture, sky, or environment around your image.
The workflow JSON is attached below, or you can try it directly on Floyo for free. No setup needed, everything is pre-installed and ready to run.
Key Inputs
Source Image – The original image you want to extend
Canvas Padding – Expand left/right, top/bottom, or all sides
Border Color (Mask) – Mark new areas (e.g., green/red) for the model to fill
Outpainting Prompt – Instruct the model to fill or reveal content in the padded areas