Thumbnail DesignPrompt.

Act as an expert thumbnail designer, visual storyteller, audience-attention strategist and AI image-generation prompt specialist.

TASK:
Create a high-impact thumbnail or cover-image prompt designed for fast recognition, strong mobile readability and clear visual storytelling.

The thumbnail should attract attention without using misleading clickbait, fabricated results or irrelevant visual exaggeration.

PLATFORM:
[YouTube / Facebook Reel / YouTube Short / TikTok / Instagram Reel / other.]

CONTENT TYPE:
[Video thumbnail / Reel cover / Short cover / episode cover / tutorial cover / other.]

TOPIC:
[What is the content about?]

TARGET AUDIENCE:
[Who should click or watch?]

PRIMARY PROMISE:
[What real value will the viewer receive?]

MAIN SUBJECT:
[Person / product / food / object / result / comparison / other.]

SUBJECT DETAILS:
[Describe accurately.]

CHARACTER REFERENCE:
[If applicable, describe or provide the reference character.]

EXPRESSION:
[Excited / curious / confident / surprised / focused / warm / serious / other.]

KEY OBJECT:
[Optional.]

VISIBLE TEXT:
[Exact short text or "No visible text".]

BRAND NAME:
[Optional.]

BRAND COLOURS:
[Optional.]

VISUAL STYLE:
[Photorealistic / premium commercial / cinematic / clean professional / food-commercial / bold / editorial / other.]

BACKGROUND:
[Describe desired environment or graphic treatment.]

COMPOSITION:
[Subject left / right / centre / split / close-up / forced perspective / other.]

ASPECT RATIO:
[16:9 / 9:16 / 1:1 / other.]

SAFE AREA:
[Platform-specific requirements if known.]

CAMERA:
[Close-up / chest-up / waist-up / product hero / overhead / macro / other.]

LIGHTING:
[Studio / natural / dramatic / warm / clean commercial / other.]

REFERENCE IMAGE REQUIREMENTS:
[What must remain unchanged?]

ELEMENTS TO AVOID:
[Optional.]

SPECIAL REQUIREMENTS:
[Any additional instructions.]

THUMBNAIL DESIGN REQUIREMENTS:

1. DEFINE THE THUMBNAIL'S JOB
The thumbnail should help a viewer understand enough of the content promise to decide whether to watch.

2. OPTIMIZE FOR SMALL-SCREEN VIEWING
Assume the thumbnail will often appear very small.

3. ONE PRIMARY IDEA
Do not try to communicate the entire video inside the image.

4. IDENTIFY THE MAIN VISUAL HOOK
Choose the strongest:

Person
Expression
Product
Food
Problem
Result
Contrast
Question
Unexpected visual

that genuinely relates to the content.

5. AVOID RANDOM ATTENTION-BAIT
Do not add unrelated:

Explosions
Money
Arrows
Shocked faces
Fire
Warning symbols

unless they genuinely support the topic.

6. CREATE A CLEAR FOCAL POINT
The eye should immediately land on the most important subject.

7. MAKE THE MAIN SUBJECT LARGE
Avoid tiny subjects that disappear at thumbnail size.

8. CONTROL SUBJECT COUNT
Prefer one dominant subject or a simple two-part comparison.

9. DO NOT OVERCROWD
Avoid too many:

People
Products
Icons
Labels
Text blocks
Decorative elements

10. USE STRONG VISUAL HIERARCHY
Typical priority:

Main subject
Key object / result
Headline text
Supporting element
Brand

11. DESIGN FOR MOBILE FIRST
Check whether the main idea remains clear when mentally reduced to a small phone-screen preview.

12. USE HIGH CONTRAST
Separate the focal subject from the background using:

Light
Colour
Depth
Scale
Negative space

13. DO NOT RELY ON TINY DETAIL
Small labels, fine interface elements or complex background information will disappear.

14. KEEP TEXT SHORT
Prefer approximately 2–6 strong words when text is necessary.

15. DO NOT REPEAT THE FULL VIDEO TITLE
Thumbnail text should complement the title rather than duplicate a long sentence.

16. PRESERVE EXACT SUPPLIED TEXT
If the user gives exact wording, do not rewrite it unless requested.

17. DO NOT INVENT RANDOM TEXT
Avoid meaningless AI-generated signs, labels or lettering.

18. CREATE TEXT HIERARCHY
If multiple text elements are unavoidable:

Primary phrase
Secondary phrase
Brand

19. KEEP TEXT LARGE
Typography should remain readable at reduced size.

20. USE SIMPLE TYPOGRAPHY
Prefer bold, clean, high-legibility treatment.

21. LIMIT FONT VARIETY
Avoid mixing many unrelated styles.

22. KEEP TEXT AWAY FROM BUSY DETAILS
Use clear negative space.

23. KEEP TEXT AWAY FROM IMPORTANT FACIAL FEATURES
Do not cover:

Eyes
Mouth
Key expression
Important product details

24. USE SAFE MARGINS
Keep important elements away from edges that may be cropped.

25. VERTICAL COVER MODE
For Reels and Shorts, keep important content within the central safe zone.

26. YOUTUBE 16:9 MODE
Use strong horizontal composition with large recognizable subject matter.

27. FACEBOOK REEL COVER MODE
Prioritize vertical readability and ensure the central crop still works.

28. SHORTS COVER MODE
Keep the primary subject and core text near the centre.

29. SPLIT-COMPARISON MODE
For before/after or A/B concepts:

Use clear visual separation
Keep each side simple
Do not fabricate differences

30. DO NOT CREATE FAKE BEFORE / AFTER RESULTS
Only visualize transformations supported by actual content.

31. CHARACTER THUMBNAIL MODE
If a creator or presenter appears:

Keep the face large
Preserve identity
Use an expression appropriate to the actual content

32. DO NOT REDESIGN A REFERENCE PERSON
When a character reference is supplied, preserve:

Face
Skin tone
Hair
Age appearance
Distinctive features

33. DO NOT OVER-BEAUTIFY
Avoid:

Plastic skin
Face reshaping
Extreme smoothing
Unrealistic teeth
Generic influencer appearance

34. EXPRESSION MUST MATCH THE CONTENT
Do not use extreme shock for ordinary informational topics.

35. CONTROL EYE DIRECTION
The character may look:

At camera
At product
At text
At result

to guide viewer attention.

36. USE GAZE AS COMPOSITION
Where useful, direct the subject's gaze toward the key object or message.

37. USE HAND GESTURES PURPOSEFULLY
Pointing, presenting or holding should support the story.

38. KEEP HAND ANATOMY REALISTIC
Require:

Correct fingers
Natural grip
Believable joint position

39. FOOD THUMBNAIL MODE
Prioritize:

Texture
Moisture
Freshness
Colour
Steam
Gloss
Cut surface
Serving detail

where relevant.

40. DO NOT ALTER THE REAL DISH IDENTITY
If reference food is supplied, preserve:

Shape
Layering
Texture
Colour
Toppings
Serving style

41. PRODUCT THUMBNAIL MODE
Keep the actual product:

Shape
Colour
Packaging
Material
Proportions

accurate.

42. DO NOT INVENT PRODUCT FEATURES
No imaginary buttons, accessories or packaging details.

43. TUTORIAL THUMBNAIL MODE
Show:

Problem
Tool
Result
Process clue

without making the frame too complex.

44. BUSINESS THUMBNAIL MODE
Use:

Clean visual hierarchy
Strong contrast
Professional styling
Relevant workplace context

45. TECH THUMBNAIL MODE
Use actual topic-related visual cues rather than generic neon AI imagery.

46. AI CONTENT MODE
Avoid automatically using:

Robot heads
Glowing brains
Circuits
Random holograms

unless directly relevant.

47. RESULTS-BASED THUMBNAIL MODE
If the content has a real measurable result, show only supplied values.

48. DO NOT INVENT METRICS
Never create unsupported:

Revenue
Views
Percentages
Savings
Weight loss
Performance improvements

49. DO NOT INVENT SOCIAL PROOF
Avoid fake:

Subscriber numbers
Ratings
Comments
Testimonials
Awards

50. DO NOT CREATE FALSE URGENCY
Avoid:

Watch now
Before it's gone
Last chance
Urgent

unless genuinely supported.

51. DO NOT CREATE FALSE SCARCITY
Never invent limited quantities or availability.

52. CREATE CURIOSITY THROUGH INFORMATION GAPS
Show enough to make the viewer want the explanation.

53. DO NOT HIDE THE CONTENT BEHIND DECEPTION
Curiosity should not misrepresent what the viewer will receive.

54. USE CONTRAST PURPOSEFULLY
Contrast can come from:

Colour
Scale
Before/after
Old/new
Problem/solution
Simple/complex

only where relevant.

55. USE COLOUR PURPOSEFULLY
Control a limited visual palette.

56. USE ACCENT COLOUR FOR EMPHASIS
Highlight:

Important text
Key object
Result
Comparison point

57. DO NOT MAKE EVERYTHING BRIGHT
If every element is emphasized, nothing becomes the focal point.

58. BACKGROUND SHOULD SUPPORT THE SUBJECT
Avoid backgrounds that compete with the main idea.

59. USE BACKGROUND BLUR CAREFULLY
Blur should improve separation without making the scene fake.

60. USE LIGHTING TO DIRECT ATTENTION
Place strongest useful light on the primary subject.

61. KEEP SKIN COLOUR NATURAL
Avoid unnatural colour casts.

62. CONTROL HIGHLIGHTS
Avoid blown-out facial or product areas.

63. CONTROL SHADOWS
Keep facial details readable.

64. USE FORCED PERSPECTIVE WHEN HELPFUL
Foreground objects can appear larger for emphasis, but anatomy and product proportions should remain believable.

65. DO NOT DISTORT THE FACE WITH PERSPECTIVE
Maintain recognizability.

66. USE DEPTH
Separate:

Foreground
Subject
Background

to improve clarity.

67. DO NOT CREATE VISUAL CLUTTER
Remove elements that do not help explain or sell the content idea.

68. USE ARROWS SPARINGLY
Only use an arrow when it meaningfully directs attention to something that is not otherwise obvious.

69. AVOID RED CIRCLES WITHOUT PURPOSE
Do not automatically mimic low-quality clickbait conventions.

70. USE GRAPHIC SHAPES PURPOSEFULLY
Simple:

Panels
Gradients
Frames
Lines

may improve hierarchy.

71. KEEP STYLE CONSISTENT
Do not combine unrelated:

Photorealism
Cartoon
3D
Vector
Sketch

without intentional direction.

72. PRESERVE BRAND CONSISTENCY
Use supplied:

Colours
Typography style
Logo
Character styling

73. DO NOT REDESIGN THE LOGO
Use the provided identity accurately.

74. KEEP BRANDING SECONDARY
The content promise should usually dominate.

75. CREATE A THUMBNAIL STORY
The viewer should be able to infer:

What is happening?
What is unusual?
Why should I care?

76. VISUALIZE THE CONTENT, NOT THE TITLE
Instead of merely writing words, create an image that supports the concept.

77. USE OBJECT RELATIONSHIPS
Examples:

Person presenting product
Hand revealing result
Tool next to problem
Finished food beside ingredients

78. PRIORITIZE EMOTION WHEN HUMAN-LED
Human expressions can be strong attention anchors when authentic to the topic.

79. PRIORITIZE RESULT WHEN RESULT-LED
The finished result may be stronger than the creator's face for some content.

80. PRIORITIZE PRODUCT WHEN PRODUCT-LED
Keep packaging and form accurate.

81. PRIORITIZE TEXT ONLY WHEN TEXT IS THE CONTENT
Do not make thumbnails unnecessarily typography-heavy.

82. CREATE DEPTH WITHOUT VISUAL NOISE
Use:

Lighting
Scale
Overlap
Controlled shadow

83. CONTROL CROPPING
Avoid cutting off:

Chin awkwardly
Hands at joints
Product labels
Critical food features

84. ALLOW INTENTIONAL EDGE CROPPING
Large faces or products may extend beyond the frame when compositionally useful.

85. KEEP CRITICAL FEATURES VISIBLE
Intentional crop must not destroy recognizability.

86. AVOID EMPTY DECORATIVE SPACES
Negative space should serve:

Text
Breathing room
Balance
Focus

87. CREATE A COMPOSITION MAP
Define:

Subject zone
Object/result zone
Text zone
Brand zone
Safe zone

88. CREATE ONE PRIMARY VERSION
Produce one strong concept rather than many weak ideas.

89. CREATE OPTIONAL A/B VARIATION
Where useful, change one major variable:

Expression
Object
Text hook
Composition

while preserving the same content promise.

90. DO NOT TEST EVERYTHING AT ONCE
A/B variants should differ clearly enough to learn something.

91. CREATE THE FINAL MODEL-READY PROMPT
Include:

Subject
Action
Expression
Composition
Camera
Lighting
Background
Text
Aspect ratio
Quality
Constraints

92. INCLUDE EXACT TEXT IN QUOTATION MARKS
When visible copy is requested, clearly identify the exact words.

93. INCLUDE NEGATIVE CONSTRAINTS
Use relevant instructions such as:

No random text
No extra people
No distorted hands
No fake logos
No watermark
No duplicate subject
No product redesign

94. KEEP NEGATIVE PROMPTS FOCUSED
Avoid huge unrelated keyword lists.

95. CREATE A THUMBNAIL-SIZE TEST
Ask whether the core idea remains understandable at very small size.

96. CREATE A TITLE-COMPLEMENT TEST
Check whether thumbnail text adds something useful instead of simply repeating the title.

97. CREATE A TRUTHFULNESS CHECK
Verify the visual does not imply:

A result not shown in the content
A product feature that does not exist
A reaction that misrepresents the topic
A comparison unsupported by evidence

98. CREATE A PLATFORM-CROP CHECK
Confirm important details remain visible under expected platform cropping.

99. CREATE A BRAND CHECK
Ensure colours, identity and visual language remain consistent.

100. FINAL QUALITY CHECK
Before finalizing verify:

- platform is defined
- aspect ratio is correct
- one primary idea dominates
- focal subject is large enough
- thumbnail works at small size
- text is short
- text is readable
- exact wording is preserved
- title and thumbnail complement each other
- safe margins are respected
- key subject is not accidentally cropped
- facial expression matches the content
- character identity is preserved
- product or food identity is preserved
- hands are anatomically plausible
- background is controlled
- contrast is strong
- no fake results were added
- no fake metrics were added
- no fake testimonials or ratings were added
- no false urgency or scarcity was added
- no meaningless AI text appears
- the thumbnail accurately represents the content

OUTPUT FORMAT:

1. THUMBNAIL STRATEGY
Explain the main click-driving visual idea.

2. PRIMARY VISUAL HOOK
Describe the strongest attention element.

3. COMPOSITION MAP
Specify:

Main subject
Secondary object / result
Text
Brand
Negative space
Safe area

4. FULL IMAGE GENERATION PROMPT
Provide one polished model-ready prompt.

5. TEXT & TYPOGRAPHY INSTRUCTIONS
Include exact visible text and placement.

6. NEGATIVE / PROTECTION INSTRUCTIONS
List only relevant restrictions.

7. OPTIONAL A/B VERSION
Provide one meaningful alternative concept.

8. MOBILE THUMBNAIL CHECK
Explain what should remain recognizable at small size.

9. TRUTHFULNESS CHECK
Identify anything that must be verified against the actual content.

IMPORTANT:
- Optimize for small-screen and thumbnail viewing.
- Communicate one strong visual idea.
- Keep text short and readable.
- Use curiosity without misleading clickbait.
- Preserve reference people, food and products accurately.
- Do not invent results, metrics, testimonials, ratings or product features.
- Do not create false urgency or scarcity.
- Design specifically for the selected platform and aspect ratio.