What sizes does the Social Banner Generator support?

Four native sizes, each matching the platform's official spec. X (formerly Twitter) header at 1500×500. LinkedIn personal and company banner at 1584×396. YouTube channel art at 2560×1440 with a 1546×423 mobile safe-zone overlay so your headline stays readable on phones. Facebook personal and page cover at 820×360. All four export at native resolution, so nothing is upscaled by the platform.

Why is YouTube channel art 2560×1440 with a safe zone?

YouTube renders the same banner across wildly different screen sizes — a 70-inch TV, a 13-inch laptop, a phone. It crops the 2560×1440 upload differently on each: the full image on TV, a letterboxed strip on desktop, a tight central 1546×423 strip on mobile. The safe zone is that central area that survives the mobile crop without being cut off. Anything critical — headline, logo, handle — must live inside that zone.

How is the PNG exported?

The export button renders the live preview to a PNG at either native resolution (1500×500, 1584×396, 2560×1440, or 820×360) or 2x retina for the smaller three formats. Rendering uses html2canvas, which rasterizes the DOM preview element to a real canvas and exports via canvas.toBlob() as a PNG file.

Do uploaded logos ever leave my browser?

No. Uploaded logos are read into a browser File API object via FileReader and rendered directly into the preview. Nothing uploads to a server, nothing logs, nothing persists after the tab closes.

What text length works best on each banner size?

The three narrow banners — X, LinkedIn, and Facebook — are wide but vertically short, so headlines should stay under 50 characters for a single line and under 80 characters for two lines. For YouTube channel art, the safe zone is roughly square, so you have room for longer headlines, but platform convention is to keep them punchy.

How do I upload the banner to each platform?

X: Edit profile → click the header area → Upload photo. LinkedIn: camera icon on the banner → Upload photo → crop. YouTube: Studio → Customization → Branding → Banner image → Upload. Facebook: camera icon on the cover → Edit cover photo → Upload photo. After uploading, check the result on both desktop and mobile — platforms occasionally re-crop.

How to Design a Social Media Banner That Survives Every Platform (2026)

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