The recommended 유튜브 YouTube channel banner (channel art) spec is 2560×1440 px (16:9). Upload 2560×1440, under 6MB. The safe area visible on every device is only the central 1546×423 — keep logos and text inside it.
"Fill" center-crops when the ratio differs. "Fit" pads with the chosen color. "Fit width" keeps the height ratio, for detail pages.
Drag the preview of a "Fill" result to move the crop.
JPG, PNG or WebP, quality 50–100. Each result card shows size and weight.
Select several files to convert them to the same spec and download with "Save all".
2560×1440 px, ratio 16:9. Upload 2560×1440, under 6MB. The safe area visible on every device is only the central 1546×423 — keep logos and text inside it.
Choose "Fit (padding)" to avoid cropping; with "Fill" you can drag the preview to move the crop.
Upscaling beyond the original blurs. Use the largest original you have; when downsizing, quality 90+ is visually lossless.