YouTube

YouTube Thumbnail Size

Quick Answer

For YouTube custom thumbnails, use a 16:9 layout and export a high-resolution image. YouTube recommends large thumbnails for preview use, with a minimum width of 640 px, supported image formats such as JPG, GIF, or PNG, and upload limits that vary by device.

Quick Reference

Platform: YouTube
Category: Social Media
Topic: Thumbnail size
Safer aspect ratio: 16:9
Recommended workflow: design large, keep text readable, compress only at the end
Minimum width noted by YouTube: 640 px
Common working canvas: 1280 x 720 px or higher 16:9 canvas
Last checked: July 2026

Prepare in one place

Publish Action

Prepare a YouTube thumbnail layout with safe text placement.

Open YouTube Thumbnail Preset View Templates

Use one preparation flow for sizes, titles, descriptions, keywords, and checklists instead of switching between separate tools.

Important Notes

YouTube now lists different thumbnail upload size limits by device. Check the current upload path before final export.
Vertical videos can show different thumbnail behavior on some surfaces.
The thumbnail must follow YouTube policies and should not mislead viewers.

Best Practices

Use one clear subject and one short text message.
Keep faces, products, or key objects away from the extreme edges.
Test the thumbnail at small mobile size before publishing.
Avoid thin fonts, busy backgrounds, and low-contrast text.

Do / Don't Examples

Correct:

Large product or face in the center.
Short text: "Beginner Guide".
Clear contrast between text and background.

Wrong:

Ten tiny text lines over a busy image.
Important words placed at the edge.
A low-resolution screenshot stretched to fit.

Publish Action

Use Dokuntag Publish to prepare a YouTube thumbnail canvas, check readable text, and export a clean preview image.