What is an AI YouTube Shorts thumbnail maker?

An AI YouTube Shorts thumbnail maker creates a vertical 9:16 cover image for your Short from a text description you provide. TryMyPost generates the visual for you - a bold focal subject with legible text - so you don't need design skills or a template. You just set it as your Shorts thumbnail before uploading.

Is there a free AI Shorts thumbnail maker?

Yes. TryMyPost has a free plan with a limited number of AI generations per month, so you can make YouTube Shorts thumbnails for free. Pro and agency plans unlock higher generation limits, higher image quality, brand presets and multi-platform export.

What size is a YouTube Shorts thumbnail?

Shorts are vertical 9:16, 1080x1920 pixels. TryMyPost generates every Shorts cover at the correct vertical 9:16 ratio, keeping the focal subject and headline clear of the right-side action rail and the bottom title bar where they could be covered.

Is a Shorts thumbnail different from a normal YouTube thumbnail?

Yes. A standard YouTube thumbnail is horizontal 16:9. A Shorts thumbnail is vertical 9:16 - it shows full-bleed in the Shorts feed and is also cropped to a square on your channel grid. This page generates the 9:16 Shorts cover; for 16:9 covers, use our YouTube Thumbnail Generator.

Can AI create a Shorts thumbnail from a text prompt?

Yes. Describe your Short - the hook, the subject, the mood - and TryMyPost generates a vertical 9:16 cover with a strong focal subject and space for a bold headline. You can generate several options and pick the one that earns the click.

Does it generate the Shorts video?

No. TryMyPost generates the still 9:16 thumbnail / cover image for your Short, not the video itself. The cover is built to grab attention in the feed and on your channel grid; you upload your own video alongside it.

Will the thumbnail still look good on my channel grid?

Yes. Shorts covers are cropped to a square on the channel grid, so TryMyPost keeps the focal subject and key text centered and inside a safe zone, so your cover reads both full-bleed in the feed and cropped square on the grid.

How is this different from Canva Shorts templates?

Canva gives you editable templates you fill in by hand. TryMyPost generates an original Shorts cover from your description - no template to start from, every thumbnail unique and on-brand. It's faster for producing covers at volume and needs no design skills.

AI YouTube Shorts Thumbnail Maker
From idea to a 9:16 Shorts cover in seconds.

The AI Shorts thumbnail maker for creators. Describe your video and get a bold vertical 9:16 cover - focal subject and legible text - that stops the scroll in the Shorts feed and still reads cropped square on your channel grid.

Generate a thumbnail See pricing

How it works

From idea to Shorts thumbnail in three steps

No design skills. No templates. Describe the Short and TryMyPost generates the full vertical 9:16 cover.

Describe your Short

Tell TryMyPost what the Short is about - the hook, the subject, the emotion - and the look you want. The clearer the brief, the bolder the cover.

Pick the 9:16 canvas and style

Shorts covers are vertical 9:16. Describe your colors and mood, and the AI keeps the focal subject centered and the headline legible, clear of the right-side action rail and bottom title bar.

Get your thumbnail, ready to upload

Download your 9:16 Shorts cover, then set it as your thumbnail. It stays sharp in the vertical feed and still works cropped to a square on your channel grid.

Describe your Short

Tell TryMyPost what the Short is about - the hook, the subject, the emotion - and the look you want. The clearer the brief, the bolder the cover.

Pick the 9:16 canvas and style

Shorts covers are vertical 9:16. Describe your colors and mood, and the AI keeps the focal subject centered and the headline legible, clear of the right-side action rail and bottom title bar.

Get your thumbnail, ready to upload

Download your 9:16 Shorts cover, then set it as your thumbnail. It stays sharp in the vertical feed and still works cropped to a square on your channel grid.

See it in action

Write a prompt, get a full Shorts cover

This vertical 9:16 Shorts thumbnail was generated by TryMyPost straight from a text prompt - bold focal subject, legible headline, ready for the Shorts feed.

Your prompt

A vertical 9:16 YouTube Shorts thumbnail for a sneaker drop. Single sneaker on a wet city sidewalk at night, chrome and electric blue, sharp focal subject and bold two-word headline that stays readable in the Shorts feed and cropped square on the channel grid.

9:164:516:9

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Shorts

Comments

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Start creating

Generate your first Shorts thumbnail in seconds.

Join the creators using TryMyPost to make bold, click-worthy vertical 9:16 Shorts covers - no design team, no templates to wrestle with.

Free plan available. No credit card required.

Generate a thumbnail Open the YouTube Shorts preview / mockup

Why TryMyPost

Everything you need for click-worthy Shorts covers

Not a template editor. TryMyPost generates original, on-brand vertical 9:16 Shorts thumbnails from your idea.

Built for 9:16, vertical-first

Every cover is generated for the vertical 9:16 canvas (1080x1920), full-bleed for the Shorts feed - not a 16:9 thumbnail squeezed sideways.

Legible in the feed and on the grid

A strong focal subject and bold text stay readable scrolling the vertical Shorts feed - and still hold up cropped square on your channel grid.

Original visuals, not templates

Each thumbnail is generated from your prompt, so it is unique and on-brand - no template every other channel is also using.

On-brand in seconds

Describe your colors, mood and style, or save a Brand DNA profile, and every Shorts cover stays consistent with your channel.

Who it's for

Built for anyone posting Shorts

From solo creators to busy channels, generate scroll-stopping vertical 9:16 Shorts thumbnails without a design team.

Creators & YouTubers

Turn every Short into a bold 9:16 cover with a legible hook in minutes - no Photoshop, no templates.

Brands & e-commerce

Announce drops, launches and offers with on-brand vertical Shorts covers that earn the click.

Agencies & freelancers

Produce on-brand Shorts thumbnails for multiple channels in minutes and scale your output.

Editors & channel managers

Fill your Shorts pipeline with original 9:16 covers generated from a single prompt.

Looking for a 16:9 thumbnail instead?

This maker creates vertical 9:16 covers built for Shorts. For standard horizontal videos, use the 16:9 AI YouTube Thumbnail Generator

Need other formats too? Try the full AI Post Creation tool

Generated with TryMyPost

YouTube Shorts thumbnails created with AI

Every cover here was generated by TryMyPost's AI from a text prompt - vertical 9:16 Shorts thumbnails. Click a cover to see the exact prompt that created it.