TOOL / LOCAL IMAGE CHECK
YouTube thumbnail mobile preview: check it small.
Choose an image and inspect a reduced 16:9 preview. Processing happens in your browser; this tool does not upload the image.
The badge is illustrative, not a pixel-perfect reproduction of every YouTube surface.
Look for one clear subject, readable text, and enough contrast. If it only works when enlarged, simplify before exporting.
What this preview can tell you
Reducing an image can reveal crowded composition, text that is too small, or a subject that blends into the background. It cannot predict click-through rate or reproduce every device, feed, or user setting. A small image is a useful check, not a performance test.
Adobe Express discusses small mobile thumbnail previews around 168 × 94 px in its YouTube thumbnail maker guide. The preview size here is a practical reference point, not a YouTube guarantee.
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