Luna Image Editor
Get Luna Image Editor from the Chrome Web Store
Why does overlay not work when I drop an image into the sidebar?
Open Luna Image Editor settings from the gear icon and enable overlay images.
When overlay images are disabled, the default action is to clear the temporary image after you crop or drop a new image into the sidebar.
Why is background removal slow or crashing?
Luna Image Editor background removal uses local AI. On older computers it may fall back to CPU processing, which can be very slow. On some older systems, the processor or browser may not support the required features, which can lead to messages such as worker crash, SIMD not supported, or similar errors.
Try updating your browser, graphics drivers, and processor drivers. If possible, test on a newer machine or a computer with better GPU support. Background removal runs locally and does not use a cloud service.
Why is upscale very slow?
Luna Image Editor upscale uses local AI. To increase resolution, the AI must infer likely extra image detail and rebuild a larger version of the image, so the process can be especially slow.
Upscaling starts only after you select the specific area you want to make higher resolution. This gives the AI less image data to process. You can still select the whole image and upscale everything.
If you do not have a strong graphics card, avoid relying on upscale in a production workflow. Upscale runs locally, so its speed depends on your computer.