Get the size right every time
Position your image inside the exact frame YouTube or TikTok expects — thumbnail, 4K thumbnail, channel banner or cover — and download it at the right pixel size.
This browser can't run the tool
This tool needs features your browser doesn't support. It works in current versions of Chrome, Edge, Firefox and Safari, including on Android and iOS.
Drop your image here
or click to choose a file — JPG, PNG, WebP or AVIF, up to 30 MB
No account, no watermark. Your image is positioned and exported on this device and never uploaded.
Read from your device. Nothing was uploaded, and nothing will be — the work happens on your own processor.
Drag the image to reposition it. It always fills the frame — nothing outside the frame is included when you export.
How it works
- Step 1
Pick a frame
YouTube thumbnail, the new 4K option, channel banner, or TikTok cover — each sized to the platform's own spec.
- Step 2
Add your image
Drop in a photo or design. It fills the frame automatically, and you can drag and zoom to choose exactly what shows.
- Step 3
Download the exact size
One file, at the pixel dimensions the platform expects. No cropping guesswork after you upload it.
Not an editor — a fitting room
This tool does not add text, filters or layers. It solves a narrower, more common problem: knowing the exact size a platform wants, and seeing which part of your image actually lands inside it before you find out the hard way.
The frame always shows the true pixel dimensions, scaled down to fit your screen — what you see is what gets exported, not an approximation. Drag to reposition, drag a corner or scroll to zoom; the image always fills the frame edge to edge.
Everything runs on your device. The image you drop in is never uploaded, and the file you download is built by your own browser.
Why this matters
Uploading below the new 4K option
YouTube now accepts 3840×2160 thumbnails, and a lower-resolution upload can look soft on a TV or large monitor. This tool exports at the exact resolution you pick, so nothing gets upscaled after the fact.
Just not wanting to guess
Every platform has its own size, and they change — YouTube added the 4K option in 2026. Rather than remembering or re-searching each one, the frame is already the right shape.
Getting it right before you upload
A wrong-sized image often gets cropped or stretched by whatever platform you hand it to, in a spot you didn't choose. Framing the shot yourself first means you decide what's in it — not a default crop.
Keeping an unreleased thumbnail private
A thumbnail or banner for a video that has not gone live yet is itself something worth not putting on a random server — this tool never sees it either, since it never leaves your device.
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Frequently asked questions
- Should I use this or Canva?
- If you want to design a thumbnail, use Canva — it is a design tool with templates, fonts and layers, and this is not trying to be that. Use this when you already have the image and just need it at exactly 1280x720 or 2560x1440, without loading a design app to crop one picture. Compared to Canva
- Is my image uploaded anywhere?
- No. The image is positioned and exported entirely on your device — nothing is sent anywhere, and the download is built by your own browser.
- Why does the image always fill the whole frame?
- Because a thumbnail, banner or cover with a gap or transparent strip at the edge is not a usable file for any of these platforms — they all expect the frame filled edge to edge. The image is scaled so it always covers the frame completely; dragging and zooming choose which part of it shows, not whether it fills the space.
- Which format should I choose?
- PNG if your image has sharp text, a logo, or fine lines — it is lossless, so nothing blurs. JPG if it is a photograph and you want a smaller file; the difference is not usually visible at these sizes.
- Will zooming in blur my image?
- Zoomed in far enough, yes — you are asking the tool to show fewer of the image's original pixels stretched across the same frame. The zoom range is capped so it cannot go far enough to turn into visible mush, but a very tight crop on a small source image will look softer than the same crop on a large one.
- Is there a maximum file size?
- 30 MB. Everything happens in your browser tab, which has far less memory available to it than your computer as a whole.