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Resize a YouTube thumbnail.

Crop to 16:9, resize, compress, and download.

3840 × 2160
Your browser needs canvas support to use this image tool.
Choose or drop a thumbnail JPEG, PNG, or WebP · up to 100 MB

Processed in your browser. Nothing is uploaded.

YouTube thumbnail basics

Size
3840 × 2160YouTube’s current recommendation
Ratio
16:9Used across players and previews
File size
Under 2 MBThe conservative mobile and API target
About safe zones and upload limits

YouTube does not publish a universal safe zone for standard thumbnails. These guides are practical checks, and interface placement can vary. Desktop uploads currently allow larger files, but 2 MB is the portable target across mobile and the Data API.

Sources: YouTube Help and YouTube Data API. Reviewed August 2026.

YouTube thumbnail size FAQ

Current guidance and browser-only processing.

What size should a YouTube thumbnail be?

YouTube currently recommends 3840 × 2160 pixels for custom video thumbnails, with a minimum width of 640 pixels. A 16:9 aspect ratio remains the practical choice for standard videos because it is used across YouTube players and previews.

Does a YouTube thumbnail have to be under 2 MB?

It depends on how you upload. YouTube currently lists a 2 MB mobile limit for video thumbnails and a 50 MB desktop limit. The YouTube Data API also documents a 2 MB maximum. This tool highlights 2 MB as the conservative target that works across those routes.

Are the safe zones official YouTube specifications?

No. YouTube does not publish a universal safe-zone specification for standard video thumbnails. The edge and timestamp guards in this tool are practical composition checks, and placements can vary by surface, device, language, and future interface changes.

Does Mittalmar upload or store my thumbnail?

No. The image is decoded, resized, compressed, and downloaded by your browser. It is never sent to Mittalmar or a third-party image service.

Can I load a WebP thumbnail?

Yes. You can use a local WebP, JPEG, or PNG as the source. Because YouTube's current Help guidance lists JPG, GIF, and PNG upload formats, this tool exports JPEG or PNG for a cautious compatibility target.