Thumbnail prompt library

Thumbnail prompt library on Morphic

Tested thumbnail prompts you can copy and run on Morphic, built for the click target rather than the printed piece. A face, two or three huge words, hard contrast and margins that survive being shown at 168 pixels wide. Each one explains what the parts do, so you can adapt rather than guess.

Video thumbnail of a man mid-sentence beside two lines of heavy outlined white type, generated with Seedream 5.0 Pro

Two lines against a flat teal wall

Video thumbnail. A man in his forties on the right third of the frame, mouth open mid-sentence, lit by a hard key from camera left against a flat deep teal background. On the left, heavy white sans-serif type with a thick black outline set on exactly two lines: the first line reads I WAS and the second line reads WRONG. Those three words are the only text in the picture and each appears once. The type block sits well inside the frame with a clear margin of at least one letter height on every side, touching no edge. Extremely high contrast, big simple shapes. 16:9.

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Video thumbnail dominated by a single huge numeral with a small subject beside it, generated with Seedream 5.0 Pro

Big numeral, small everything else

Video thumbnail. An enormous numeral 7 in heavy white sans-serif with a thick black outline filling most of the left two thirds of the frame, set on a single line. Beside it on the right, small by comparison, a stack of hardback books lit by a hard key from the left against a flat dark plum ground. That numeral is the only character in the picture and it appears once. The type block sits well inside the frame with a clear margin of at least one letter height on every side, touching no edge. 16:9.

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Video thumbnail of a woodworker with three short words stacked in the left third, generated with Seedream 5.0 Pro

Three words stacked over a workshop

Video thumbnail. A woodworker in a workshop on the right, looking down at a joint in his hands, lit by a hard warm key from the left against a background thrown heavily out of focus. On the left, heavy white sans-serif type with a thick black outline set on exactly three lines, one word per line: the first line reads THIS, the second line reads CHANGED and the third line reads EVERYTHING. The type block sits well inside the frame with a clear margin of at least one letter height on every side, touching no edge. 16:9.

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Article card thumbnail in a squarer format with type across the lower band, generated with Seedream 5.0 Pro

Wider thumbnail for an article card

Article card thumbnail in a squarer format. A single potted olive tree against a flat warm sand ground filling the upper two thirds, lit by a hard key from the right. Across the lower band, heavy white sans-serif type with a thick black outline set on a single line reading SLOW GROWTH, running the width of the frame. Those two words are the only text in the picture and each appears once. The line sits clear of the left, right and bottom edges by at least one letter height. 4:3.

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Video thumbnail of a woman with a strongly readable surprised expression against flat green, generated with Seedream 5.0 Pro

Wide eyes and a raised hand

Video thumbnail. A woman in her twenties on the left third with a strongly readable surprised expression, eyes wide and one hand raised open beside her face, the pose clear enough to identify from its silhouette alone. Hard key from camera right against a flat mid green ground with nothing behind her. No text anywhere in the image. Extremely high contrast, big simple shapes, generous empty space on the right. 16:9.

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Thumbnail with a single word set vertically down the left edge beside a still life, generated with Seedream 5.0 Pro

Type running down the side

Thumbnail in a slightly wide format. A stack of folded indigo cloth on the right two thirds against a flat bone white ground, lit by a hard key from the upper right. Down the left edge, one word in heavy dark navy sans-serif set vertically with the letters stacked one above another, reading DYE. That word is the only text in the picture and it appears once. The type block sits well inside the frame with a clear margin of at least one letter height on every side, touching no edge. High contrast, no fine detail. 5:4.

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Video thumbnail of a chef at a pass with two different words to the alternative version, generated with Seedream 5.0 Pro

Same shot, different words

Video thumbnail. A chef at a pass wiping the rim of a plate, on the right third, lit by a hard key from camera left against a flat deep charcoal ground. On the left, heavy white sans-serif type with a thick black outline set on exactly two lines: the first line reads TOO and the second line reads LATE. Those two words are the only text in the picture and each appears once. The type block sits well inside the frame with a clear margin of at least one letter height on every side, touching no edge. 16:9.

Edit prompt
Video thumbnail of a lone figure on a ridge with a single huge word above them, generated with Seedream 5.0 Pro

One word across an empty sky

Video thumbnail. A single small figure standing on a bare ridge against a wide pale overcast sky, placed low and to the right. Above them one enormous word in heavy white sans-serif with a thick black outline, set on a single line, reading ALONE. That word is the only text in the picture and it appears once. The type block sits well inside the frame with a clear margin of at least one letter height on every side, touching no edge. Simple silhouette, no fine detail anywhere. 16:9.

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Video thumbnail of a closed door in a dark corridor with a single huge question mark, generated with Seedream 5.0 Pro

One question mark and a closed door

Video thumbnail. A single closed door at the end of a dark corridor, lit only by a hard shaft of light escaping underneath it, everything else falling to near black. Over the upper right, one enormous white question mark with a thick black outline. That single character is the only text in the picture and it appears once. The type block sits well inside the frame with a clear margin of at least one letter height on every side, touching no edge. Extremely high contrast, almost no detail anywhere. 16:9.

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Video thumbnail split down the middle by a hard vertical line with a subject either side, generated with Seedream 5.0 Pro

Split screen with a hard divider

Video thumbnail split precisely down the vertical centre by a hard bright yellow line about a finger width across, with no gradient or blending at the join. On the left half a battered old hand plane against deep blue, on the right half a brand new one against deep red, both lit identically from the front. Each object large and simple, centred in its half. No text anywhere in the image. Extremely high contrast. 16:9.

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Square cover with a single tool centred above one short word, generated with Seedream 5.0 Pro

Square with one word and one object

Square cover image. A single steel chisel lying horizontally across the upper middle of the frame against a flat deep forest green ground, lit hard from the left so the bevel catches. Directly beneath it on the same vertical centre line, one word in heavy white sans-serif with a thick black outline, set on a single line, reading SHARP. That word is the only text in the picture and it appears once. The type block sits well inside the frame with a clear margin of at least one letter height on every side, touching no edge. 1:1.

Edit prompt
Video thumbnail of a tightly cropped face filling the frame against flat colour, generated with Seedream 5.0 Pro

Nothing but a face and a colour

Video thumbnail. A face cropped very tight so the top of the head runs off the upper edge of the frame and the chin sits near the bottom, filling almost the entire picture. A woman in her forties looking straight down the lens without expression, lit by a hard flat frontal key. A narrow strip of flat electric blue visible at one side. No text anywhere in the image. Extremely high contrast, visible skin texture, no other element. 16:9.

Edit prompt
Video thumbnail of a remote road sign with two words of type beside it, generated with Seedream 5.0 Pro

Location as the whole hook

Video thumbnail. A lone weathered road sign standing beside an empty gravel road across flat scrub under a hard blue sky, the sign small and in the right third, its own face blank and carrying no lettering at all. On the left, heavy white sans-serif type with a thick black outline set on exactly two lines: the first line reads KANNIS and the second line reads ROAD. Those two words are the only text in the picture and each appears once. The type block sits well inside the frame with a clear margin of at least one letter height on every side, touching no edge. 16:9.

Edit prompt
Video thumbnail carrying the same two words as its pair over a completely different image, generated with Seedream 5.0 Pro

Same words, different shot

Video thumbnail. A single burnt pan sitting on a dark hob, shot from above and lit hard from the right, filling the right third of the frame. On the left, heavy white sans-serif type with a thick black outline set on exactly two lines: the first line reads TOO and the second line reads LATE. Those two words are the only text in the picture and each appears once. The type block sits well inside the frame with a clear margin of at least one letter height on every side, touching no edge. Flat deep charcoal surround. 16:9.

Edit prompt
Video thumbnail where the type sits behind the figure so they overlap, generated with Seedream 5.0 Pro

Two words behind the subject

Video thumbnail. A man standing in the right third with his arms crossed, lit hard from the left against a flat deep green ground. Behind him, heavy white sans-serif type with a thick black outline set on exactly two lines, the first line reading BUILT and the second line reading TWICE, positioned so that both words sit clear of him in the open left half and only the empty space after the final letter passes behind his shoulder. Every letter is complete and unbroken. Those two words are the only text in the picture and each appears once. 16:9.

Edit prompt
Video thumbnail of a woman cut out with a hard edge against a flat orange ground, generated with Seedream 5.0 Pro

Face cut out against flat orange

Video thumbnail. A woman in her thirties cut out cleanly with a hard crisp edge and placed against a completely flat saturated orange ground with no texture, gradient or scenery of any kind behind her. She fills the right half, turned slightly toward camera with a raised eyebrow. Lit hard from the front left so the cut edge reads sharply. No text anywhere in the image. Extremely high contrast, big simple shapes, generous empty space on the left. 16:9.

Edit prompt
Square playlist cover with one word centred over a dark textured ground, generated with Seedream 5.0 Pro

Square cover with the type centred

Square cover image. A dark textured concrete ground filling the frame with one word centred in heavy white sans-serif with a thick black outline, set on a single line, reading GROUNDWORK. That word is the only text in the picture and it appears once. The type block sits well inside the frame with a clear margin of at least one letter height on every side, touching no edge. Soft raking light across the concrete texture from the upper left. Nothing else in the frame. High contrast, no fine detail. 1:1.

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Portrait thumbnail with two words set below a seated figure, generated with Seedream 5.0 Pro

Portrait crop with the words beneath

Portrait thumbnail. A woman seated on a plain stool in the upper two thirds, arms folded, looking slightly off camera, lit by a hard key from the right against a flat deep mustard ground. Below her with a clear gap of at least one letter height between her and the type, heavy white sans-serif with a thick black outline set on exactly two lines: the first line reads SHE and the second line reads LEFT. Those two words are the only text in the picture and each appears once. 3:4.

Edit prompt
Video thumbnail of a single trainer floating large against a flat pink ground, generated with Seedream 5.0 Pro

Object hero with nothing else in frame

Video thumbnail. One plain unbranded running shoe photographed at an angle and floating large against a completely flat bright pink ground, filling most of the frame with a wide even margin around it. The upper, tongue and sole carry no logo, no side stripe and no manufacturer marking of any kind. Lit hard from the upper left so the sole tread and the stitching catch the light and one clean shadow falls to the lower right. Nothing else in the picture at all. No text anywhere in the image. Extremely high contrast, big simple shapes. 16:9.

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Video thumbnail with a thick hand drawn arrow pointing at a detail on an engine, generated with Seedream 5.0 Pro

Arrow pointing at the thing that matters

Video thumbnail. A car engine bay photographed close and lit hard from above, with a very thick bright yellow hand drawn arrow laid on top of the picture, pointing down at one specific hose fitting near the centre. The arrow is crude, solid and about as wide as a finger, with no shading or gradient. No text anywhere in the image. Everything else in the frame kept dark and simple so the arrow reads first. 16:9.

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Questions fréquentes

How do I use these thumbnail prompts?
Copy a prompt, paste it into Morphic with Seedream 5.0 Pro selected, and run it as written. Then change the subject and the words but keep the clause that states which words sit on which line, because that one sentence is the difference between type that spells correctly and type that repeats a word.
Why is this library built for Seedream 5.0 Pro?
It won a head to head. Given the identical prompt, the model billed as best in class for typography returned a broken doubled letter in the middle of a word, and Seedream 5.0 Pro returned clean two line type, correct spelling and a real margin on every side. Short display type at huge sizes turns out to be a different problem from typography in general, and the newest cinematic tier is currently better at it.
How is this different from the poster and advertising creative libraries?
Size and place. A poster is a printed piece read from across a room and can carry fine type and detail. An advertising key visual answers a brief and gets placed across paid media. A thumbnail is shown roughly the width of a thumb, next to a dozen competitors, with a duration badge dropped on one corner. Everything here follows from that: two or three words, no fine detail anywhere, and a margin wide enough that nothing important sits where the app will cover it.
Why does every prompt say exactly which words go on which line?
Because naming a word count does not constrain the line breaks. Asked for three words with no layout given, a model will stack them however it likes and can repeat one in the process, which is exactly what happened in testing. Writing it as the first line reads this and the second line reads that fixes both the arrangement and the spelling, and it costs one clause.
How do I test whether a thumbnail actually works?
Shrink it until it is about the width of your thumb and look at it out of the corner of your eye. If you cannot tell what the subject is and read the words in under a second, no amount of detail at full size will save it. Almost every fix is the same three moves: fewer words, more contrast between the subject and the background, and more empty space around both.