Handytool
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YouTube thumbnail resizer

Resize any image to YouTube's exact 1280×720 thumbnail spec, re-encode as JPG or PNG, and stay under the 2 MB upload limit — all in your browser.

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The resize runs entirely in your browser. Your image is never uploaded.

About the YouTube thumbnail resizer

Handytool's YouTube thumbnail resizer takes any image — a screenshot, a photo, a designed cover — and outputs a clean 1280×720 JPG (or PNG) ready to upload. Choose cover mode to crop-fill the 16:9 canvas or contain mode to letterbox with a background colour, and tune the JPG quality slider until the file drops under YouTube's 2 MB limit. Nothing leaves your browser: the image is decoded, resized with the Canvas API and re-encoded locally.

YouTube thumbnail resizer features

  • 01

    Exact 1280×720 output

    Resizes every upload to YouTube's recommended thumbnail spec — 1280 pixels wide, 720 tall, 16:9. Cover mode fills the frame; contain mode letterboxes with a custom background.

  • 02

    2 MB upload limit, enforced

    The resizer shows the output file size live and flags anything over 2 MB — the hard cap YouTube Studio imposes on thumbnail uploads. Drop the JPG quality slider to fit.

  • 03

    JPG or PNG, your choice

    Export as JPG for the smallest file (best when you have photographic content) or PNG for sharp text and flat colour. Both are accepted by YouTube Studio.

YouTube thumbnail resizer FAQ

What is the correct size for a YouTube thumbnail?
1280×720 pixels at 16:9, 640 pixels minimum width, under 2 MB, saved as JPG, PNG, GIF or BMP. The resizer outputs the recommended spec by default.
My image is a different aspect ratio — will it get squashed?
No. Cover mode crops the middle of your image to fill 1280×720, while contain mode keeps the whole image visible and adds a background on the unused edges. Pick whichever preserves the composition better.
Why is my thumbnail over 2 MB?
Large photos, PNG output and very high JPG quality all inflate the file. Switch to JPG, drop quality to 80–85 — you'll keep the visual quality and comfortably fit under 2 MB.
Is the file uploaded to a server?
No. The resize runs entirely in your browser using the HTML5 Canvas API. Handytool never receives your image.
Can I use this for Shorts or banner images?
This tool is tuned for the 16:9 thumbnail. Shorts use a 9:16 cover pulled from the video itself, and channel banners are 2560×1440 — use our YouTube banner maker for those.

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