YOUTUBE THUMBNAIL RESIZER 09

Resize a thumbnail in your browser.

Choose one local image, make a 1280 × 720 thumbnail, pick how the frame is filled, and export an upload-ready JPG. The image stays on this device.

Browser canvas

Source imageChoose one

Choose a local image PNG, JPG, or WEBP · drag and drop works The file is read by this browser and is not uploaded.

No image selected.

Output presetFixed target

Frame treatmentCrop the edges

Padding colorUsed by Fit image

#111827

Target1280 × 720

ExportUpload-ready JPG

File size—

Mobile checkChoose an image

Choose a local image to start.

No account, server upload, batch queue, or image API is used. All processing happens in this browser.

Live preview

1280 × 720 · 16:9

Your resized image will appear here.

Fill frame crops to the exact target.See thumbnail size source notes

THE SIZE CHECK

The export checks the file before you leave.

This resize YouTube thumbnail tool does the size check in the same browser step. When the first JPG is over the mobile video-thumbnail limit, it lowers the local JPEG quality and tries again until the exported file is under the gate or the browser reports that it could not get there. The official page lists a separate desktop limit, so both contexts are shown below.

Official source excerpt: “Remain under MB limits. Limits depend on the device you’re using to upload your thumbnail:”
“Mobile: 2 MB for video thumbnails or 10 MB for podcasts.”
“Desktop: 50MB for video, Shorts, and podcast thumbnails.” — Add custom thumbnails on YouTube - Computer - YouTube Help. Reviewed 2026-09-17.

Read the full thumbnail size notes Open the thumbnail maker

InputOne local imagePNG · JPG · WEBP

Canvas1280 × 72016:9 YouTube thumbnail preset

OutputJPG with a size checkSaved directly from the browser

HOW IT WORKS

A resize YouTube thumbnail workflow with no detour.

Load locally. Select one image or drop it on the tool. The file never leaves this browser tab.

Choose the frame. Fill crops the edges, Fit keeps the whole image with padding, and Stretch maps the source to the exact frame.

Export once. The thumbnail resizer produces a JPG, shows its file size, and reports the mobile upload check.

QUESTIONS

YouTube thumbnail compressor and resizer FAQ

What does this YouTube thumbnail size converter export?

It exports one 1280 × 720 JPG from the local canvas. The selected crop, padding, or stretch treatment is included in the saved file.

What happens when the JPG is too large?

The browser tries lower JPEG quality settings locally and updates the file-size readout. It does not send the image to a server.

Which option keeps the whole image?

Choose Fit image. It adds padding where the source aspect ratio does not fill the 16:9 frame.

Can I use this thumbnail resizer without an account?

Yes. There is no login and no daily usage counter. The tool handles one local image at a time.

Is this a resize image for YouTube thumbnail service?

Yes, but the work stays in your browser: select a local file, preview the 1280 × 720 result, then save the checked JPG.