What aspect ratios are supported?

YouTube thumbnails render at 1280×720 (16:9). Blog headers at 1200×628. Twitter/X cards at 1200×675. Square social at 1080×1080. The style selector auto-adjusts the aspect ratio.

Can I add my own logo or brand colors?

Early access includes brand color injection — provide a hex code and the palette shifts to match. Logo overlay is on the roadmap for the full launch.

Does it work for both YouTube Shorts and long-form videos?

Yes. Standard thumbnails are 16:9 for long-form. A 9:16 Shorts cover mode is available under the Twitter/X Card layout with manual crop.

How does the AI know what imagery to generate?

Your title/description is processed into a visual prompt that captures the topic, emotion, and content category. The style you select adds compositional and color direction on top. The model was fine-tuned on high-CTR thumbnail patterns.

Can I use an existing image as a base?

Yes. Upload a base image and the model will restyle it to match your chosen thumbnail style while preserving key compositional elements — useful for adding a face shot or product photo.

Are the outputs watermark-free?

All outputs are watermark-free, full resolution, ready for immediate upload to YouTube, Substack, WordPress, or any social platform.

How fast is generation?

10–15 seconds per thumbnail on RTX 5090. Generating a batch of 4 takes under 45 seconds total.

Can I generate multiple variations at once?

Yes — generate ×1, ×2, or ×4 variations per run. Each variation uses a different seed so you get genuinely different compositions to A/B test.

AI Thumbnail Maker Pro · Tier A · ComfyUI

Thumbnails that
actually get clicked.

Six proven styles — YouTube Viral, Blog Header, Twitter Card, Cinematic, Bold Text, Minimalist. Text overlay baked in. Custom brand palette. Watermark-free output on local RTX 5090.

Styles

~12s

Per thumbnail

RTX 5090

Local render

Step 01 · Describe Your Content

What's it about?

Give the AI context — title, topic, target emotion. Optionally upload a base image (product shot, face) to include in the composition.

Title or Topic

Visual Description (optional — adds imagery detail)

Text Overlay Line 1 (optional)

Text Overlay Line 2 (optional)

Base Image (optional — upload a face or product shot)

⌬

Drop image or click to browse

PNG · JPG · ≤ 10MB

Step 02 · Configure Style

Choose your format

Thumbnail Style

Brand Accent Color (hex, optional)

Variations

Idle.

How the pipeline works

Prompt synthesis

Your title and description are translated into a detailed visual composition prompt optimized for the selected platform's aspect ratio and click-behavior patterns.

Style conditioning

Each style injects specific composition rules: YouTube Viral uses high-contrast facial expression anchoring; Cinematic applies teal-and-amber grading; Minimalist enforces negative space constraints.

Text overlay compositing

If you provided title text, the model composites it into the render at safe-zone coordinates — not slapped on top after the fact. It's part of the generation.

Local delivery

Renders on private RTX 5090 in 10–15 seconds. Platform-correct resolution. Watermark-free PNG delivered directly. Your content stays private.

Join Early Access

Early-access members get the first 20 thumbnails free and a permanent 40% discount when we launch. Drop your email to reserve your spot.

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