Resize your YouTube thumbnail
Upload a photo, snap it to the recommended thumbnail size, and export it ready to upload — no signup, nothing uploaded to a server.
Drop an image here, or click to browse
JPG, PNG, WebP, GIF, or BMP
Preview
16:9 widescreenMaking a Short? Try the Shorts thumbnail resizer instead.
How it works
Upload your photo
Drag a file in, or select one from your device. Nothing is sent anywhere.
Snap to the thumbnail size
Use the recommended 1280×720 preset, or set custom dimensions and scale to fit.
Export & upload
Choose JPG, PNG, or WebP, adjust quality, and download — ready to set as your video's thumbnail.
Built for real workflows
Runs entirely on-device
Resizing happens in your browser via the Canvas API. Your photo is never uploaded or stored.
Recommended widescreen size
Outputs at 1280×720 (16:9) — the resolution YouTube recommends for a crisp thumbnail at every size it's shown.
Fills the frame automatically
Your photo is scaled to cover the 16:9 shape and centre-cropped, so there are never awkward bars.
Pixel-perfect or percentage
Enter exact width and height, or scale proportionally with a single slider.
Format conversion
Export as JPG, PNG, or WebP with adjustable compression quality to control file size.
Instant preview
See the exact result and its file size before you download anything.
Frequently asked questions
What size should a YouTube thumbnail be?
YouTube recommends a 1280×720 pixel image, a 16:9 ratio, with a minimum width of 640 pixels to still upload successfully.
Why is the shape wide instead of square?
YouTube thumbnails use the same 16:9 ratio as the video player itself, so the image scales cleanly across search results, the homepage, and suggested videos.
Can I use a portrait or square photo?
Yes. Your photo is automatically scaled to cover the wide frame and centre-cropped, so tall or square source photos still produce a clean 16:9 result.
Is this different from a Shorts thumbnail?
Yes — standard YouTube video thumbnails use a wide 16:9 ratio, while Shorts thumbnails use a tall 9:16 ratio to match the vertical, full-screen format.
Are my photos uploaded to a server?
No. Every resize happens locally in your browser using the Canvas API. Files never leave your device, so there's nothing to upload and nothing stored on our end.