ChatGPT Prompts for YouTube Thumbnails That Get Clicks

A good thumbnail does one job: makes someone curious enough to click. ChatGPT is surprisingly good at building them, because it can add text, place a subject and set the shape in one go. Where people go wrong is asking for too much. A thumbnail is seen small on a phone, so one face, one object and a handful of words beat a busy collage every time.

Copy a prompt, fill in the [brackets] and add your own photo with the + button if you want to appear in it. Put any text you want in quotes so ChatGPT uses the exact words.

Face and reaction thumbnails

The classic format: a clear face, a strong expression and a short hook.

Surprised reaction

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Create a 16:9 YouTube thumbnail using my uploaded photo. Show me with a surprised expression on the right, a bright [yellow] background, and the words "[I TRIED IT]" in huge bold white letters with a black outline on the left.

Pointing at the result

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16:9 YouTube thumbnail: me pointing at a large [before and after image] on the left, clean blue background, short text "[A MONTH LATER]" across the top in bold. Keep my face unchanged.

Calm expert look

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Make a 16:9 thumbnail with my uploaded headshot on the right, a simple dark background, and two words "[STOP DOING]" in large bold red text. Keep my face exactly the same.

Two-person debate

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Create a 16:9 thumbnail split down the middle, a person on each side facing each other, contrasting [red and blue] backgrounds, and the word "VS" in the centre in bold white.

Tutorial and how-to thumbnails

Show the outcome, not the process.

Finished result hero

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16:9 YouTube thumbnail showing a finished [room makeover / cake / garden] in bright light, with the text "[EASY]" in a bold rounded badge in the corner.

Step count

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Make a 16:9 thumbnail with a large number "[5]" on the left and a clean image of [the tool or topic] on the right, plain light background, modern bold font.

Mistake to avoid

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Create a 16:9 thumbnail showing [a common mistake] with a big red cross over it and the text "[DON'T DO THIS]" in bold at the top.

Software screen

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16:9 thumbnail with a laptop screen showing [the app or website], a hand pointing at one highlighted button, and the text "[HIDDEN SETTING]" in bold yellow.

Comparison and review thumbnails

Side-by-side layouts tell the story at a glance.

Product face-off

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Create a 16:9 thumbnail with [product A] on the left and [product B] on the right on contrasting backgrounds, and a bold question mark in the middle.

Before and after

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16:9 thumbnail split in two: a dull, messy [subject] on the left labelled "BEFORE" and a bright, tidy version on the right labelled "AFTER".

Honest review

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Make a 16:9 thumbnail of [product] held up to the camera, with a simple star rating graphic and the text "[WORTH IT?]" in bold.

Vlog and story thumbnails

Mood and place matter more than text here.

Travel vlog

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Create a 16:9 thumbnail of a striking view of [place] at golden hour with me in the foreground looking out, and the place name in clean bold capitals.

Day in the life

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16:9 thumbnail collage of three bright, simple snapshots from [my day as a ...], with one short caption "[A DAY IN MY LIFE]" across the bottom.

Big announcement

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Make a 16:9 thumbnail with me holding [a box / a sign] and a shocked expression, confetti in the air, and the words "[BIG NEWS]" in bold.

Background and edit prompts

Use these to fix a thumbnail you've already made.

Remove the background

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Remove the background from my uploaded photo and make it transparent, keeping my hair edges clean, so I can place it on a thumbnail.

Make text pop

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Make the text in this thumbnail larger, bolder and easier to read on a phone, with a dark outline. Keep the image otherwise unchanged.

Simplify a busy thumbnail

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Simplify this thumbnail: remove the extra objects, keep only my face and the main object, and keep the text "[...]".

Brighter colours

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Make this thumbnail brighter and more saturated so it stands out, without changing the layout, faces or text.

Shorts cover prompts

Shorts use a vertical shape, so change the ratio.

Vertical Short cover

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Create a 9:16 vertical cover image for a YouTube Short: me in the centre with [an expression], a bold one-line hook "[...]" in the top third, plain background.

Short tip cover

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9:16 vertical image showing [the object] large in the middle with the text "[1 TIP]" in bold at the top, bright simple colours.

How to get better results with thumbnail prompts

• Always state the shape. YouTube suggests 16:9 for video thumbnails and 9:16 for Shorts, and ChatGPT can follow the ratio in your prompt or the aspect ratio picker.
• Keep text to a few words in quotes, then zoom right out to check it reads at phone size.
• If ChatGPT misspells a word, ask it to fix only the text.
• Use the selection tool for small fixes, but check the edges; OpenAI says edits can spread beyond the selection.
• Before uploading, save it as JPG or PNG. YouTube recommends 3840 x 2160 pixels, with a minimum width of 640, and caps mobile uploads at 2 MB.

Why simple thumbnails win

It's tempting to cram in everything your video covers. Don't. People decide in a split second, and they're usually looking at a small image on a phone, so you've got room for one idea. If you can't say what the thumbnail's about in three words, it's too busy. That's why every prompt above asks for one face or object, one background colour and a short line of text. You'll get better results, and you'll find it easier to keep a consistent look across your channel, which helps returning viewers spot your videos. If a design isn't working, try changing the background colour first; it's the quickest way to make a thumbnail stand out from the ones around it.

Two YouTube rules that catch people out

First, custom thumbnails need a verified YouTube account, and for Shorts they can only be added in YouTube Studio on a computer. Second, if you upload a vertical video with a 16:9 thumbnail, YouTube replaces it with an auto-generated 4:5 thumbnail on the home and explore pages, among others. Your custom one still shows elsewhere, but plan your design so the key element survives a tighter crop.

For design principles beyond the prompt, YouTube thumbnails that get more clicks is a good companion, and where to create AI images for free lists other generators to try.

My verdict

ChatGPT makes strong thumbnails when you keep them simple: one face or object, a few bold words in quotes, the right shape for the format. Treat the first result as a draft, fix the text in a follow-up, and check it at phone size before it goes anywhere near YouTube.

Frequently asked questions

Can ChatGPT make YouTube thumbnails?

Yes. Ask for a 16:9 image, describe one focal point and put a few words of text in quotes.

What size should a ChatGPT YouTube thumbnail be?

Ask for 16:9. YouTube recommends 3840 x 2160 pixels, a minimum width of 640, and JPG or PNG files.

Can I put my own face in a ChatGPT thumbnail?

Yes. Upload your photo and ask ChatGPT to keep your face unchanged.

Why did ChatGPT get the thumbnail text wrong?

Long text is harder. Keep it to a few words in quotes and ask it to fix only the text.

Can I add a custom thumbnail to a YouTube Short?

Yes, but only in YouTube Studio on a computer, and your account must be verified. Use a 9:16 image.