If you have ever uploaded a standard 1280 × 720 px (16:9) video thumbnail directly into a YouTube Community post to promote your new video, you already know how frustrating the result looks. In the mobile Home and Subscriptions feed, YouTube forces Community post previews into a 1:1 square viewport—chopping 280 pixels off the left and right edges of your widescreen graphic until the viewer taps to expand it.
Because Community posts (now also labeled simply as Posts inside the YouTube app) appear directly inside the mobile Home feed alongside regular videos and Shorts, formatting your images for the square feed viewport can dramatically boost likes, poll votes, and click-throughs to your long-form videos.
Official YouTube Community Post Image Specifications (2026)
While YouTube's uploader accepts aspect ratios ranging between 2:5 and 5:2 during the upload step, the feed display window always prioritizes a 1:1 square frame (YouTube Community Post Image Specifications):
| Post Format | Best Resolution | Display Aspect Ratio | Max File Size & Types |
|---|---|---|---|
| Single Image Post | 1080 × 1080 px (or 1200 × 1200 px) |
1:1 Square in feed |
16 MB (.JPG, .PNG, .GIF, .WEBP) |
| Multi-Image Carousel (Up to 10 Images) | 1080 × 1080 px per slide |
1:1 Square uniform slides |
16 MB per image (up to 10 slides) |
| Image Poll (2 to 4 Options) | 1080 × 1080 px per option |
1:1 Square grid cards |
16 MB per option (JPG, PNG, GIF) |
| Animated GIF Post | 800 × 800 px |
1:1 Square loop |
16 MB ceiling (keep under 8 MB for fast mobile load) |
How to Post a 16:9 Video Thumbnail in the Community Tab Without Losing the Edges
Suppose you just published a new video and want to share its thumbnail in a Community post with a link to the watch page. If you upload the raw 1280 × 720 px file directly, the 1:1 preview tool forces you to crop out 44% of the horizontal width. Instead, use one of these three creator workflows:
1. The "1080×1080 Letterboxed Frame" Method (Fastest)
Open a 1080 × 1080 px square canvas in Canva, Figma, or Photoshop with a dark slate (#0f172a) or blurred ambient background. Drop your 16:9 thumbnail right into the center of the square (1080 × 608 px), and use the empty top and bottom bands (236 px each) to print a bold header like NEW VIDEO LIVE NOW on top and a clean callout arrow on the bottom. Because the overall file is 1080 × 1080, YouTube displays 100% of your 16:9 thumbnail inside the square feed without cropping a single pixel.
2. The "Before / After" Stacked Split Square
Two 16:9 images stacked vertically (16:9 on top + 16:9 on the bottom) create a 16:18 aspect ratio—which is almost an exact 1:1 square! If you are running an A/B thumbnail test or asking your audience which cover they prefer, stack Thumbnail A on the top half of a 1080 × 1080 canvas (1080 × 540 px) and Thumbnail B on the bottom half (1080 × 540 px). Viewers can compare both full-width designs at a glance in their feed.
3. The Center-Safe 720×720 Export
If you already need to grab an older video's cover artwork on the fly, paste your video URL into ClickMate, download the 1280 × 720 maxresdefault.jpg, and use YouTube's built-in crop slider during the Community post upload to slide the 1:1 box over the main facial expression or focal object.
Before you even run a live YouTube Studio Test & Compare A/B test, create an Image Poll on your Community tab 24 hours before publishing. Upload two candidate thumbnail concepts inside 1080 × 1080 square frames and ask your core subscribers which concept grabs their attention first.
How to Fix the "Aspect Ratio Must Be Between 2:5 and 5:2" Error on PC
When uploading wide panoramic screenshots, ultrawide gaming captures (21:9), or tall infographic strips on a desktop browser, YouTube often blocks the upload with a red warning banner regarding aspect ratio limits (Fixing Wide Aspect Ratio Community Post Errors).
- Why It Happens: Even before cropping to the
1:1feed preview, YouTube's backend image processor rejects source files that are more than 2.5 times wider than they are tall (5:2) or 2.5 times taller than they are wide (2:5). - The 2-Minute Carousel Fix: Instead of uploading one ultra-tall infographic or ultra-wide panoramic chart, slice the graphic into 2 to 5 contiguous
1080 × 1080 pxsquare panels and upload them as a multi-image carousel post. Swipeable carousels keep viewers on your post longer, sending strong engagement signals to the YouTube Home feed algorithm.
Best Practices for Multi-Image Carousels and Image Polls
- Keep Safe Margins Away From the "1/5" Counter Badge: On multi-image Community posts, YouTube places a dark pill counter (such as
1/4) in the top-right corner and pagination dots along the bottom center. Leave a90 pxmargin in the top-right and bottom-center of every1080 × 1080slide. - Account for the Percentage Bar in Image Polls: In an Image Poll, each of your 2 to 4 square images renders side by side in a 2×2 mobile grid (meaning each image is only about
170 × 170 logical pixelson a phone screen). Once a viewer votes, YouTube overlays the percentage result bar across the bottom of each square. Use bold, zoomed-in subjects that remain recognizable at stamp size. - Put Your Video Link in the First 2 Lines of Text: On mobile feeds, YouTube truncates Community post text after 3 lines behind a "Read more" link. Always place your clickable YouTube watch link on line 1 or line 2 above the image so mobile scrollers don't have to expand the caption to watch your video.
Frequently Asked Questions About YouTube Community Post Images
What is the exact image size for a YouTube Community post?
The ideal image size for a YouTube Community post is 1080 × 1080 pixels (or 1200 × 1200 pixels) with a 1:1 square aspect ratio. YouTube supports JPG, PNG, GIF, and WebP files up to 16 MB per image.
How many images can I upload in one YouTube Community post?
You can upload up to 10 images in a single standard YouTube Community post (rendered as a swipeable square carousel) or up to 4 images in an interactive Image Poll.
How do I stop YouTube from cropping my 16:9 thumbnail in a Community post?
Because the YouTube Community feed uses a 1:1 square preview frame, place your 16:9 thumbnail in the center of a 1080 × 1080 pixel square canvas with top and bottom header bars before uploading. That way, the entire 16:9 graphic stays visible inside the square preview.