Stumbnail
Stumbnail is a web-based AI tool for creating YouTube thumbnails from ideas, video titles, prompts, or YouTube links.
What Stumbnail is
Stumbnail is a web-based AI tool for creating YouTube thumbnails from ideas, video titles, prompts, or YouTube links. You can adjust colors, personas, text, and layout without rebuilding a design. Smart Merge combines uploaded images and lets AI arrange a thumbnail with its layout, text, and style. The site says thumbnails follow 1280 × 720 pixels at a 16:9 ratio, while its About page describes output up to 4K. Paid plans include prompt generation, Smart Merge, thumbnail cloning, custom asset uploads, all AI models, and private thumbnails. Each generation uses 3–47 credits depending on the model. Starter is $5 a month with 590 credits; Creator is $9.99 a month with 1,475 credits. Stumbnail has discontinued its free tier, and new purchases are temporarily unavailable. A separate previewer and downloader is free, needs no signup, and has no download limits.
Good
- Prompt or YouTube-link generation
- Smart Merge for uploaded images
- Editable colors, text, and layouts
- Private thumbnails on paid plans
- Unlimited no-signup downloader
Watch out
- No free plan or credits
- New purchases temporarily unavailable
- Generation consumes 3–47 credits
- Web platform focused on YouTube
Who it suits
Stumbnail fits YouTube creators who need AI-generated thumbnails and want to refine layouts or combine their own images. The free downloader is useful when you only need previewing and downloading.
Verdict
Stumbnail offers AI thumbnail creation with editing and image-combination tools, plus paid model access. Availability is currently constrained because purchases are paused and the free tier has ended.
Plans and prices
From Stumbnail's own pricing page, checked 9 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Starter | $5 a month | 590 credits/mo · 3–47 credits per generation, depending on AI model · New purchases temporarily unavailable · $5/month; approximately $1/wk; 590 credits/mo |
| Creator | $9.99 a month | 1,475 credits/mo · 3–47 credits per generation, depending on AI model · New purchases temporarily unavailable · $9.99/month; approximately $2.3/wk; 1,475 credits/mo |
The facts
Each one read from Stumbnail's own pages, with the date it was checked.
What it does
- AI providers
- The privacy policy names Google Imagen and Recraft AI among the third-party AI services and says prompts may be processed by those providers.checked 9 Oct 2026
- Editing
- Users can adjust colors, personas, text, and layout without starting over.checked 9 Oct 2026
- Generation
- The pricing page says thumbnails can be generated from a prompt or YouTube link, and generation costs 3–47 credits depending on model.checked 9 Oct 2026
- Output
- The home page says generated thumbnails follow 1280 × 720 pixels at a 16:9 aspect ratio; the About page also describes output up to 4K.checked 9 Oct 2026
- Payment availability
- The pricing page says it has temporarily stopped accepting new payments and purchases are unavailable.checked 9 Oct 2026
- Privacy
- The privacy policy says Stumbnail does not sell personal information and does not store full credit card details; payments are processed by Stripe.checked 9 Oct 2026
- Product
- Stumbnail describes itself as an AI YouTube thumbnail generator that turns ideas or video titles into creator-ready visuals.checked 9 Oct 2026
- Retention
- The privacy policy says thumbnails and related data are retained for up to 365 days and may then be deleted.checked 9 Oct 2026
- Security
- The privacy policy lists TLS/SSL encryption in transit, encrypted storage at rest, access controls and authentication, and regular security audits and updates.checked 9 Oct 2026
- Smart Merge
- Smart Merge combines uploaded images and lets AI compose a thumbnail with layouts, text, and style.checked 9 Oct 2026
- Support
- The contact page lists email support, says replies usually arrive within a few hours, and describes WhatsApp as the fastest contact method with 24/7 availability for urgent issues.checked 9 Oct 2026
The company
- Founded
- 2024checked 28 Sep 2026
Money
- Free tier
- Stumbnail says it discontinued its free tier and no longer provides free credits.checked 9 Oct 2026
- Free tools
- Stumbnail offers a free thumbnail previewer and downloader; the downloader page says no signup is needed and downloads have no limits.checked 9 Oct 2026
- Plan features
- Every paid plan includes prompt-based generation, Smart Merge, thumbnail cloning, custom asset uploads, access to all AI models, and private thumbnails.checked 9 Oct 2026
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