YouTube now recommends a larger thumbnail than many older guides report. Its current help page says 3840 × 2160 pixels, with a 16:9 ratio and a minimum width of 640 pixels.
Image for Post does not have a named YouTube thumbnail layout. Its 1600 × 900 image preset uses 16:9 and clears the minimum width, but it is below the current recommended resolution.
Long-form video thumbnails
YouTube’s custom thumbnail help currently recommends:
| Item | Current YouTube guidance |
|---|---|
| Resolution | 3840 × 2160 pixels |
| Minimum width | 640 pixels |
| Aspect ratio | 16:9 |
| File types | JPG, GIF, or PNG |
| Mobile size limit | 2 MB for video thumbnails |
| Desktop size limit | 50 MB |
The desktop and mobile limits differ. Check the upload interface used by your team rather than copying one limit into every workflow.
YouTube also says custom thumbnails must follow its Community Guidelines and may be rejected or removed when they violate policy.
Is 1600 × 900 usable?
Yes, with a qualification. The Image for Post 1600 × 900 layout:
- is 16:9;
- is wider than the 640-pixel minimum;
- can export as PNG;
- is below the 3840 × 2160 recommendation.
It can be a workable source when the text and image remain clear after upload. For the highest-resolution recommendation, use an editor that can create 3840 × 2160.
Do not promise clicks based on dimensions. A correct canvas only prevents avoidable blur and crop problems.
Thumbnail composition
YouTube’s thumbnail and title guidance recommends accurate titles and thumbnails, readable fonts, and a design that is not overly complex. It also suggests using YouTube Analytics to judge effectiveness.
Use this check:
- Make the subject recognisable at a small size.
- Use only the words that add information beyond the title.
- Keep those words large and high contrast.
- Avoid implying something the video does not contain.
- Compare variants with YouTube’s own test feature when eligible.
YouTube’s thumbnail testing reports use watch-time share, not only click-through rate. That is a better basis for a decision than a generic colour or face rule.
Channel profile and banner
YouTube’s channel branding requirements say:
- profile images can be JPG, GIF, BMP, or PNG, cannot be animated, must be at most 15 MB, and render at 98 × 98 pixels;
- banner upload minimum is 2048 × 1152 at 16:9;
- the safe area at that minimum is 1235 × 338;
- the recommended banner is 2560 × 1440;
- banner files must be 6 MB or smaller.
The same banner displays differently across devices, so YouTube crops it. Keep words and logos inside the safe area.
Image for Post’s canvases do not include the YouTube banner recommendation or safe-area overlay. Its square layout can provide a profile source, but you must preview the crop in YouTube.
Community posts
YouTube’s Community post guidance allows up to five images or animated GIFs, with JPG, PNG, GIF, or WEBP files up to 16 MB. It suggests 1:1 because that is how images appear in the feed, while viewers can expand the full image.
Image for Post’s 1080 × 1080 square PNG is an exact 1:1 working canvas for this use. It does not assemble the multi-image post.
Shorts
For videos uploaded after 15 October 2024, YouTube says a square or vertical video up to three minutes can be categorised as a Short. A wider ratio such as 16:9 is used when a creator wants to avoid that classification.
YouTube also says custom thumbnails cannot be uploaded for Shorts in the same way as long-form videos. A creator can select a frame in the YouTube app, and the choice cannot be changed after upload.
Image for Post can export 1080 × 1920 and 1080 × 1080 MP4 files. It is a simple animated-design tool, not a full YouTube editor, audio system, or Short-thumbnail uploader.
Create a supported asset
Open Image for Post to create a 1600 × 900 thumbnail source, a 1080 × 1080 Community image, or a vertical MP4 without signup. Use another editor when you need YouTube’s 3840 × 2160 thumbnail recommendation or 2560 × 1440 channel banner.
Sources checked
- YouTube Help: adding custom thumbnails
- YouTube Help: thumbnail and title tips
- YouTube Help: channel branding
- YouTube Help: Community post images
- YouTube Help: three-minute Shorts
Sources and product behavior were checked on 29 July 2026.