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870 B
870 B
YouTube Thumbnail Experiments
A checklist for testing thumbnail concepts with Raphael AI.
1. One subject, big
Thumbnails are viewed tiny. Prompt for a single bold subject filling 60% of the frame.
2. High contrast
Use complementary colors: orange subject on deep blue background.
3. Emotion
For faces, specify the emotion strongly: shocked expression, wide eyes.
4. A/B test
Make two concepts and use your platform's test feature to compare click-through.
Tips
- Add text in an editor, max four words.
- Check the thumbnail at 160 px width before uploading.
- Avoid misleading imagery; it hurts retention.
About the tool
Raphael AI is a free browser-based text-to-image generator; no account is needed to try it: https://raphael.app
License: CC BY 4.0 for the notes in this repository.