Free tool
Resize your thumbnail to the right format
Convert any image to 1280 × 720, 1080 × 1920 or 1024 × 1024, and check the file stays under YouTube's 2 MB limit. Runs in your browser.
Your image stays on your device.
How to resize a thumbnail
- 1
Drop your image or click to choose a file.
- 2
Pick the target format and choose Fill (crop to fill) or Fit (keep the whole image).
- 3
Download the result as a JPG, optimized to stay under 2 MB.
What is the best size for a YouTube thumbnail?
1280 × 720 pixels, with a 16:9 aspect ratio, and a minimum width of 640 pixels. The file must be under 2 MB.
What size is a Shorts, TikTok or Reels cover?
1080 × 1920 pixels, 9:16. Keep faces and text in the center: each app overlays buttons and captions on the edges.
Will resizing reduce quality?
Downscaling keeps quality. Upscaling a small image cannot add detail: start from the largest source you have.
Need a better thumbnail than the one you have?
Fleekio generates YouTube, Shorts, TikTok and Instagram thumbnails with your face and your own AI keys.
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