Free tool
YouTube thumbnail resizer
Turn any image into a correctly sized YouTube thumbnail. Choose fill or fit, adjust the quality to stay under 2 MB, and download a ready-to-upload JPG.
Fill vs fit
Fill (crop)
Scales the image to cover the whole frame and crops what doesn’t fit. Best when the subject is in the centre.
Fit (blurred edges)
Keeps the whole image and fills the empty space with a blurred copy — great for square or vertical images.
Sizes you can export
All the specs are in our YouTube thumbnail size guide.
- 1280×720 — YouTube’s recommended thumbnail size.
- 1920×1080 — the same 16:9 ratio at higher resolution.
- 1080×1920 — vertical covers for Shorts, Reels and TikTok.
Frequently asked questions
Is the image uploaded to a server?
No — resizing happens in your browser and the image stays on your device.
Why is my file over 2 MB?
Large, detailed images can exceed YouTube’s limit. Lower the JPEG quality slider until the size drops under 2 MB.
Make your next thumbnail in minutes
Tell the AI agent what your video is about — it proposes a thumbnail, you approve it, and you can tweak it by asking.
Keep exploring
YouTube thumbnail size
The exact dimensions, file size and format YouTube needs — plus Shorts and safe areas.
Learn more →Thumbnail preview tool
See your thumbnail in a realistic YouTube feed — desktop, mobile and sidebar, dark and light.
Learn more →YouTube Shorts thumbnails
How Shorts covers work, the right size, and how to design a clean Shorts grid.
Learn more →