YouTube Thumbnail Resizer
Upload an image or paste a YouTube URL — resize and download in seconds.
Drop your image here
or click to browse
JPG · PNG · WebP · GIF
Every Format, One Tool
Resize thumbnails for YouTube, Instagram, Shorts, and more — all aspect ratios supported.
1280×720
1080×1080
720×1280
1080×1350
1024×768
2560×1080
Why Use ThumbnailResizer?
Built for YouTubers and content creators who need the right thumbnail size, fast.
Everything You Need to Make Great Thumbnails
Simple, powerful tools for YouTubers and content creators.
YouTube URL Import
Paste any YouTube video URL and we'll fetch the thumbnail automatically.
Screenshot Beautifier
Place any screenshot on a beautiful gradient background with padding, shadow, and rounded corners — perfect for tech thumbnails.
Standard Size Presets
One-click presets for all YouTube-recommended thumbnail dimensions.
Batch Processing
Resize multiple thumbnails at once to save time on large projects.
AI Expand
Intelligently extend images to any aspect ratio using AI outpainting — no black bars.
YouTube Preview
See exactly how your thumbnail looks on desktop feed, search results, mobile app, and watch page sidebar — before you publish.
Works in Your Browser
No software to install. Everything runs in your browser — fast and private.
Frequently Asked Questions
Have another question? Email us at support@thumbnailresizer.com
Get tips on thumbnail design and platform updates
No spam. Just useful updates when image size specs change or new tools launch.