YouTube Thumbnail Preview – Test Your Thumbnail Design
Preview how your YouTube thumbnail looks across desktop, mobile, and different placements🔒 All processing happens in your browser. Your data never leaves your device.
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Click to upload or drag and drop
Accepts: IMAGE/*
Max size per file: 2MB
Max 2MB, recommended 1280x720 pixels (16:9)
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How to Use
- 1Upload your thumbnail image (JPG, PNG, or GIF)
- 2Optionally customize video title and channel name
- 3View how your thumbnail appears on Desktop, Mobile, Search Results, and Sidebar
- 4Ensure text is readable and image is clear on all sizes
Example
Input:
Upload a 1280x720 thumbnail imageOutput:
See real-time previews across Desktop (large), Mobile, Search Results, and Sidebar placementsFrequently Asked Questions
What thumbnail size should I use?
YouTube recommends 1280x720 pixels (16:9 aspect ratio) with a maximum file size of 2MB.
Why does my thumbnail look different on mobile?
Mobile devices show thumbnails at smaller sizes, so ensure text is large and clear enough to read on small screens.
Is my thumbnail stored anywhere?
No, all processing happens in your browser. Your thumbnail is never uploaded to any server.
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Note: This is an independent third-party tool. We are not affiliated with YouTube or Google. "YouTube" is a trademark of Google LLC.