Creator Tools
YouTube dark mode preview
Most YouTube viewers use dark mode. Preview your thumbnail in both themes to make sure it pops in every layout.
Your thumbnail is processed locally in your browser and is not uploaded.
Drag & drop or click to upload thumbnail
JPG, PNG, or WebP · 1280×720 recommended
Thumbnail checklist
- Thumbnail aspect ratio 16:9
- ✓Title under 60 characters
- ✓Duration badge visible
- High contrast text on thumbnail(Check manually)
YouTube-style preview
This preview simulates how your video might appear in a YouTube feed. Layouts may vary by device, region, and app version.
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Dark mode is the default for most viewers
Over 70% of YouTube viewers use dark mode on desktop and mobile. A thumbnail designed only for light mode might lose contrast, or text that's readable on white may become invisible on black.
Toggle between light and dark mode in the preview to check both. Pay attention to thumbnail brightness, text legibility, and color contrast.
Frequently asked questions
- Why preview thumbnails in dark mode?
- Over 70% of YouTube viewers use dark mode. A thumbnail that looks great in light mode may lose contrast or readability in dark mode, and vice versa.
- How do I switch between light and dark mode?
- Use the Light/Dark mode toggle in the preview tool. Your thumbnail and title will instantly switch between YouTube's light and dark themes.
- Is my data uploaded?
- No. Everything is processed locally in your browser. Your thumbnail and title data are never sent to any server.
This preview is an unofficial planning tool. YouTube layouts can change and may vary by device, region, and app version.