KLOORAYouTube Thumbnail Resizer
Resize any image to the YouTube thumbnail size of 1280 x 720 and keep it under the 2MB limit.
Quick answer: YouTube Thumbnail Resizer: Resize any image to the YouTube thumbnail size of 1280 x 720 and keep it under the 2MB limit. Everything runs in your browser, so nothing you enter is uploaded or stored.
Free, no signup. Updated 2026-11-05.
Tap to choose images or drop them here
Your files stay on your device. Nothing is uploaded.
How to use YouTube Thumbnail Resizer
- Choose one or more images.
- Enter the size or pick a preset, and choose how to fit.
- Download the resized images or a ZIP.
Features
- Free, no signup
- Runs in your browser, nothing is uploaded
- Works on phone and desktop
- No watermark
Frequently asked questions
What size is a YouTube thumbnail?
1280 x 720 pixels, a 16:9 ratio, under 2MB.
How do I keep it under 2MB?
This tool sets the max size to 2000 KB by default and lowers the quality only as much as needed.
Is the YouTube Thumbnail Resizer free?
Yes. It is free, needs no signup and works on any device.