Thumbnail Optimizer
Overlay safe areas, audit focus regions, and export annotated thumbnails in-browser.
Drop a thumbnail or choose a file to begin.
No file selected
Select an image to display safe-area guides.
Overview
Audit thumbnail safe areas without leaving the browser. Overlay title/action-safe guides, rule-of-thirds grid, and export annotated frames instantly.
How to use
- Drop or select a thumbnail image.
- Pick a preset or fine-tune safe margins and title-safe area.
- Toggle the composition grid and review metrics.
- Download the annotated PNG for creative briefs.
Use cases
- Validate YouTube safe areas before publishing.
- Document OTT storefront guidelines for agencies.
- Coach designers on focus-safe framing.
Tips & knowledge
- Keep faces inside the title-safe guide to avoid cropping on TV apps.
- Use presets as a starting point, then adapt to your channel.
- Export annotated frames to speed up asynchronous reviews.