1. Prepare the brief or screenshot
Write the actual topic and the object you want viewers to recognize. For a screenshot edit, use a frame from your own footage or other authorized material. The selected model accepts reference uploads up to 8 MB.
AI YouTube thumbnail generator
Your video idea. A thumbnail image.
An AI YouTube thumbnail generator turns a video brief or an authorized screenshot into thumbnail artwork. Choose 16:9 with Nano Banana Pro in the existing image generator. Text generation costs 20 credits at 1K; editing a screenshot costs 40 credits at 1K. This guide supplies prompts and manual setup; it does not import a channel, publish to YouTube or promise more clicks.
Use only screenshots, images and likenesses you have the rights to use, with consent from anyone pictured. This independent website is not affiliated with or endorsed by YouTube or Google. The prompts do not require official logos, celebrity portraits or another channel’s artwork.
A video brief or your own authorized screenshot as input
16:9 artwork with space reserved for your final title
Manual review and export; no automatic channel publishing
How to make a thumbnail
From video idea to thumbnail draft
Choose a visual that accurately represents the video. Name the central subject, its position, the background and where you will put the title.
2. Set the wide composition
Open the generator, select Nano Banana Pro, choose 16:9 and paste a prompt. For editing, upload the screenshot and say which subject details to preserve. The link does not prefill the prompt or select a model. Keep empty space for a title added later.
3. Check the quote and preview
Sign in and review the displayed quote. At 1K, text generation costs 20 credits and screenshot editing costs 40; at 4K, they cost 40 and 60 credits respectively. Review the result at a small display size before exporting.
Thumbnail prompt examples
Start with the subject and composition
Copy a prompt and adapt it to your real video topic. These are untested instructions, not output examples or performance claims. Use original subjects and add your final title after generation.
Tutorial background from text
Create a wide YouTube thumbnail background for a beginner home coffee tutorial. Place an original ceramic mug and coffee beans on the right, with clean dark teal negative space on the left for a title added later. Use warm rim lighting, a clear focal object and a simple background. No text, logos or faces.
Edit your own screenshot
Edit my authorized video screenshot into a thumbnail composition. Keep the main object recognizable and preserve its shape and color as closely as possible. Simplify the background, improve separation around the subject and leave uncluttered space for a short title. Do not invent product features, add people or include logos.
Original project reveal
Create a wide thumbnail image for my video about building a small wooden planter. Show an original finished planter with a green plant against a simple workshop background. Keep the planter prominent and leave open space beside it for a title. No text, logos, misleading before-and-after comparison or celebrity likeness.
Thumbnail review
Make the artwork match the video
A thumbnail is a visual summary of your video. Generating an image does not validate its accuracy, grant rights to third-party material or establish its effect on viewer behavior.
Keep the subject readable
Preview the result at a small size. Remove competing objects and inspect the subject silhouette. Keep important details away from the edges so you can crop without losing the focus.
Add precise text separately
Generated spelling and typography can be wrong. Put your final title into an image editor, check contrast and keep it consistent with the actual video. Do not copy another creator’s branding or imply an endorsement.
Export and upload yourself
Check the current upload requirements in your channel interface and export accordingly. The supported aspect ratio does not guarantee exact pixels or file size. Review screenshot edits for invented details before manually uploading the image.
Related guides
Continue planning creator artwork
AI banner generator
Plan website and promotional banner artwork with a wide composition.
YouTube thumbnail background template
Adapt an existing subject-and-background prompt with room for your title.
AI flyer generator
Draft event or shop flyer artwork from a written brief.
Credit plans and pricing
Review plans before submitting an image request.
Content rights and terms
Check the rules for uploaded screenshots and generated images.
FAQ
AI YouTube thumbnail generator questions
Can I make a YouTube thumbnail from text?
Yes. Choose Nano Banana Pro and 16:9 in the existing generator, then describe your real video topic, focal subject, colors and title space. Add exact text in an editor and review the finished image before uploading it yourself.
Can I use a screenshot from my video?
Yes. Upload your own authorized screenshot, up to 8 MB with the selected model, and describe the edit. Ask to preserve the main subject. Compare the result with the original because generated details can change.
What aspect ratio should I select?
16:9 is available in Nano Banana Pro for a wide thumbnail composition. Select it in the generator. Check the current channel upload requirements separately, then crop and export at the required dimensions and file size.
Is the AI YouTube thumbnail generator free?
No free generation is promised by this guide. With Nano Banana Pro, text generation costs 20 credits at 1K or 40 at 4K; a screenshot edit costs 40 at 1K or 60 at 4K. Sign in to check your balance and the current quote before submitting.
Will a generated thumbnail improve my click-through rate?
No. A click-through improvement is not guaranteed. Review whether the image accurately represents your video and is readable at a small size. This guide provides image prompts, not measured performance evidence.
Does this page automatically create or upload my thumbnail?
No. It links to the existing image tool and does not prefill a prompt, select a model, submit a job or connect to a channel. Set up and review the image yourself, then upload it through your channel interface.