Thumbnail Designer
YouTube thumbnails are the single biggest factor in click-through rate. 38Hub helps you create professional thumbnails in seconds.
Creating a Thumbnail
- Go to Thumbnail Designer from the sidebar
- Enter a visual description of what the thumbnail should show
- Enter thumbnail text — the bold text overlay (keep it 3-5 words)
- Select a vibe — Professional, Cinematic, Dramatic, High Energy, etc. (15 options)
- Select target audience and persona
- Optionally: add face references and style presets
- Click Generate
AI Concepts
Before generating, you can ask AI to suggest thumbnail concepts. Click "Generate Concepts" and AI will propose 3-4 different visual approaches for your video topic. Select the one you like and generate.
Refine Mode
Not quite right? Use "Refine" to make adjustments:
- "Make the text bigger"
- "Change the background to a darker blue"
- "Add more contrast"
- "Move the person to the left"
Replica Mode
See a thumbnail you like? Upload it as a reference and tell AI: "Create something similar but for my topic about [X]." The AI will generate a new thumbnail inspired by the reference while keeping it original.
Competitor Preview
Enter a competitor's video URL to see their thumbnail. Use it as inspiration for your own designs.
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