Stumbnail review
A focused YouTube thumbnail editor for cloning, remixing, and generating designs.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Stumbnail is a web-based AI thumbnail generator for YouTube creators who want to create, clone, and revise thumbnail designs. It can generate from prompts, video titles, YouTube links, video context, or uploaded assets. Its editor supports adjustments to colors, personas, text, and layout, with built-in text rendering and editing. Private thumbnail storage, multiple AI model access, and native 1280×720 16:9 output keep the workflow focused on YouTube publishing.
Its strongest differentiator is the combination of YouTube-aware generation and remixing tools. Creators can clone existing YouTube thumbnails, use Smart Merge to combine custom assets with AI, and adjust the resulting composition instead of relying only on a text prompt. YouTube is the listed integration, so Stumbnail is a focused fit for thumbnail production rather than a broader design or publishing ecosystem. It also provides free preview and download tools for existing YouTube thumbnails.
The published plans show two monthly options. Starter costs $5 per month and includes 590 credits, Smart Merge, prompt-based generation, YouTube thumbnail cloning, custom asset uploads, and access to all AI models. Creator costs $9.99 per month and raises the allowance to 1,475 credits while retaining the same listed features. Generations use credits rather than fixed image counts, with individual generations costing 3–47 credits depending on the model. New payments are temporarily unavailable, and there is no free plan. Stumbnail suits creators who specifically need YouTube thumbnail cloning and iterative editing; those seeking a free tier or a wider platform ecosystem should look elsewhere.
Stumbnail pros and cons
- Where it wins
- Generates thumbnails from prompts, YouTube links, or video context
- Smart Merge combines uploaded assets with AI composition
- Outputs editable, YouTube-ready 1280×720 thumbnails
- Where it doesn't
- No free plan; the free tier has been discontinued
- New payments are temporarily unavailable
- Credit costs vary by AI model from 3 to 47 credits per generation
Stumbnail fact sheet, pricing and score →
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