How to Generate Multiple Thumbnail Sizes from One Image
Free, step-by-step guide. No signup needed — everything runs in your browser.
1
Open the Thumbnail Creator
Navigate to the tool. No signup, no uploads to a server.
2
Upload your source image
Drop a high-resolution image — the larger the source, the better the thumbnails. JPG, PNG, WebP all work.
3
Pick a preset or define custom sizes
Choose from app icons, video thumbs, social previews, or add your own sizes. Toggle whether to keep aspect ratio or crop to exact dimensions.
4
Generate and download as ZIP
Hit Generate — all sizes are produced in your browser. Download them all in one ZIP, or grab specific sizes individually.
Tips for best results
- Use a square (1:1) source image for app icons — it ensures crops look right at every size.
- Start with a source at LEAST 2x the largest thumbnail size for sharp results on retina displays.
- PNG output preserves transparency — ideal for icons. JPG produces smaller files — ideal for video and photo thumbnails.
- For Open Graph (Facebook/LinkedIn link previews) the standard is 1200×630. For Twitter Cards it’s 1200×675.
- Modern app icons need many sizes: iOS uses 1024, 180, 167, 152, 120, 87, 80, 60 px. Android uses 512, 192, 144, 96, 72, 48 px.
Try Thumbnail Creator now
Generate thumbnails in multiple sizes. Free, no signup, 100% private.
Open Thumbnail Creator