YouTube Thumbnail Resizer
Resize and crop your own image into a YouTube video thumbnail (1280×720), a Shorts cover (1080×1920), or a square preview, entirely in your browser.
- Your image stays in your browser
- No uploads
- Not a YouTube downloader
Choose an image (JPG, PNG, or WebP)
Your image stays in your browser and is never uploaded.
How it works
- Upload your image
Choose a JPG, PNG, or WebP file you own. It's read locally, never uploaded.
- Pick a size
YouTube thumbnail (1280×720), Shorts cover (1080×1920), or square (1080×1080).
- Frame it
Crop to fill and drag/zoom to position, or fit with a background color. Stretch is available but distorts.
- Export
Choose JPG, PNG, or WebP, preview the result, and download. The extension matches the real format.
YouTube thumbnail size guide
A standard YouTube video thumbnail is 1280 × 720 pixels in a 16:9 aspect ratio. That is the size YouTube displays in search, suggested videos, and the watch page. Keep important elements, faces, text, your subject, away from the very bottom-right corner, where the duration stamp sits, and away from the extreme edges so nothing is clipped on smaller screens.
YouTube Shorts cover size guide
Shorts are vertical, so a Shorts cover uses 1080 × 1920 pixels (9:16). Because Shorts play full-screen with the title and buttons overlaid near the bottom and right, center your key content and leave breathing room around the edges.
Crop to fill vs. fit with background
| Mode | What it does | Best for |
|---|---|---|
| Crop to fill | Scales your image to cover the whole canvas; trims overflow. Drag and zoom to choose what stays. | Polished, edge-to-edge thumbnails. |
| Fit with background | Keeps the whole image visible; fills empty space with a background color you pick. | Logos, full graphics, or when nothing can be cropped. |
| Stretch | Forces the image to the exact canvas, distorts the picture. | Rarely; not recommended. |
Privacy and file handling
This tool is fully client-side. Your image is loaded into your browser, drawn to a canvas, and exported locally. Nothing is sent to a server, and the image is released when you choose another file or leave the page.
Frequently asked questions
Does this download thumbnails or videos from YouTube?
No. This tool does not connect to YouTube, does not fetch images or videos from YouTube, and uses no YouTube API. You upload your own image, and the tool resizes it. That is all it does.
Is my image uploaded to a server?
No. Everything happens in your browser. Your image is read locally, resized on your device, and never uploaded to Reelsavor or anyone else.
What size should a YouTube thumbnail be?
YouTube video thumbnails are 1280 × 720 pixels (16:9). The Shorts cover preset is 1080 × 1920 (9:16). A square 1:1 (1080 × 1080) preset is also included for previews.
Which image formats can I upload and export?
You can upload JPG, JPEG, PNG, or WebP. You can export JPG, PNG, and, if your browser supports it, WebP. The download's file extension always matches the real exported format.
What is the difference between Crop to fill and Fit with background?
Crop to fill scales your image to cover the whole thumbnail and trims the overflow (best for professional thumbnails). Fit with background keeps your entire image visible and fills the empty space with a background color you choose.
Why does my JPG export have a white background instead of transparency?
JPG does not support transparency, so transparent areas are filled with your chosen background (white by default). If you need transparency, export as PNG.
Can I use any image I find online?
Only use images you own or have permission to edit. Resizing someone else's image for reuse without permission can raise copyright issues.
Will resizing reduce quality?
Scaling down is usually clean. Zooming in past the image's native resolution, or using Stretch mode, can soften or distort the result. Start from the highest-resolution source you have.