YouTube thumbnail upload check
PixelProof checks the measurable parts of this upload locally, then moves the same file into an editor when dimensions, ratio, format, or size need fixing.
YouTube thumbnail upload check
Check YouTube's current 3840×2160 recommendation, 16:9 ratio, 640-pixel minimum width, and a conservative mobile-compatible file target before uploading.
Local read only. The checker uses browser APIs and does not upload the image.
Choose an image to see upload readiness.
PixelProof can verify measurable file properties before upload: dimensions, ratio, size, format, and basic white-edge signals. It cannot guarantee platform approval because policy checks, account eligibility, moderation, product accuracy, and ad review are controlled by the destination platform.
YouTube currently recommends 3840×2160 at 16:9, requires a minimum width of 640 pixels, and states video-thumbnail limits of 2 MB on mobile and 50 MB on desktop.