YouTube video thumbnail size
1280×720 pixels (1.78:1). The thumbnail is displayed as small as 210 pixels wide in sidebars, so any text on it has to survive being shrunk to roughly a sixth of its size.
- Width
- 1280 px
- Height
- 720 px
- Recommended format
- JPEG or PNG
Resize your image to exactly this
Batch is unlimited and free - every image is processed on your device, so there is no queue and no daily cap.
Dimension guidance reviewed 12 September 2026 · how we check this
Frequently asked
What size should a YouTube video thumbnail be?
1280×720 pixels. The thumbnail is displayed as small as 210 pixels wide in sidebars, so any text on it has to survive being shrunk to roughly a sixth of its size.
What file format should I use?
JPEG for photographs and PNG where you need transparency or crisp text. This tool outputs JPEG at high quality.
Do I have to upload my image to use this?
No. The resize runs in your browser using the canvas API - the image never leaves your device, and there is no daily limit.
Koldflux exports covers and carousel slides already sized correctly for every channel you publish to.
Automate this in Koldflux