YouTube preflight

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.

Video thumbnailReviewed 2026-06-01All checks →

Closed-loop workflow

1. Check this destination.

2. Fix measurable issues locally.

3. Send the export back to this check.

4. Upload after manual policy review.

YouTube

YouTube thumbnail upload check

Check thumbnail dimensions, aspect ratio, file size, and format before uploading to YouTube Studio.

Drop one image here or choose a file

Local read only. The checker uses browser APIs and does not upload the image.

Current file

Choose an image to see upload readiness.

Target requirements

FormatsJPG, JPEG, PNG, GIF

Recommended1280x720

Ratio16:9

Minimum width640px

File limit2.0 MB

Reviewed2026-06-01

Open editor without file →

What this checker can and cannot prove

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.

Source

YouTube Help

YouTube documents 1280x720 custom thumbnails, minimum width guidance, JPG/GIF/PNG support, 16:9 usage, and a 2 MB limit for video thumbnails.

Reviewed 2026-06-01