See how your Facebook Reels thumbnail will look in the grid and full-screen. Check crop zones, safe areas, and mobile visibility before publishing to avoid cut-off text or hidden content.
Free to useNo sign-up100% privateGrid + full-screenSafe zone check
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Drop your Reels cover image here or tap to upload
JPG, PNG, WebP — recommended 1080×1920 (9:16)
Upload a cover image above to see your Facebook Reels preview
Reels Grid Thumbnail
Full-Screen Reels Preview
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Your Reel
Original audio
Image Details
Dimensions—
Aspect Ratio—
Recommended1080 × 1920 (9:16)
File Size—
How to Preview Your Reels Thumbnail
Step 1
Upload your Reels cover (1080×1920 recommended)
Step 2
Check the grid thumbnail crop preview
Step 3
View the full-screen phone preview
Step 4
Review dimensions, crop safety, and verdict
Your images are processed entirely in your browser. Nothing is uploaded to any server.
Facebook Reels Cover Image Size
The full-size Facebook Reels cover image is 1080×1920 pixels in a 9:16 vertical aspect ratio. This is the same dimension used by Instagram Reels, TikTok, and YouTube Shorts — so you can reuse the same cover across platforms.
However, when your Reel appears in the Reels grid (the tab where users browse Reels), Facebook crops the thumbnail to approximately 3:4 or in some views 1:1. This center crop means the top and bottom ~15-20% of your 9:16 image is hidden in the grid view. Only when someone taps to watch do they see the full frame.
This is why previewing your cover matters — what looks perfect at 9:16 might lose key content when cropped for the grid. Verify your dimensions with the image size checker, or use the image crop tool to match the correct ratio.
Why Reels Cover Quality Matters
Your Reels cover is the first impression users get when scrolling the Reels grid. Here is why it matters more than most creators realize:
First impression in the grid: Users decide whether to tap based on the thumbnail alone — a compelling cover dramatically increases your tap-through rate
Browse behavior: The Reels grid shows many thumbnails at once, so your cover competes directly with others for attention in a crowded layout
Competition is fierce: Creators who optimize their covers consistently outperform those using random video frames — a custom cover image gives you an edge
Brand consistency: Using well-designed covers with consistent style makes your profile look professional and recognizable
A blurry, poorly cropped, or auto-selected thumbnail tells viewers your content is low-effort before they even press play.
Common Reels Thumbnail Issues
If your Reels thumbnails look wrong in the grid, here are the most common problems and what causes them:
Text cut off in the grid
Text near the top or bottom gets cropped in the grid thumbnail. Use the safe zone visualizer to check which areas are visible. Keep text in the middle 60-70% and verify readability with the text overlay checker.
Blurry cover image
Low-resolution images or compressed video frames produce blurry thumbnails. Use the image size checker to verify your cover is at least 1080×1920 pixels. Export video frames at full resolution.
Wrong crop hides the subject
If your subject is at the top or bottom, the grid crop will cut it off. Use the image crop tool to reposition, and check the safe zone visualizer to see exactly what stays visible.
How to Fix Reels Cover Problems
If your Reels covers are not looking right, follow these steps to fix common issues:
Center important content — Place faces, text, and key visual elements in the middle 60-70% of the vertical frame so they remain visible in both the grid thumbnail and full-screen view
Use the safe zone — Toggle the crop zone overlay in this preview tool to see exactly which areas get cut off in the grid. Keep all critical content inside the safe zone
Test with a preview tool — Upload your cover image here before publishing. Check both the grid thumbnail and full-screen previews to catch any problems early
Use high-resolution images — Always export your cover at 1080×1920 minimum. Larger images get downscaled cleanly, but smaller ones look blurry when upscaled
Choose a custom cover — Do not rely on Facebook's auto-selected frame. Upload a custom cover image that is designed specifically for the grid thumbnail
Remember: you can change your Reels cover even after posting by editing the Reel, so it is always worth fixing a bad thumbnail.
Tips for Better Facebook Reels Covers
High contrast: Use bold colors and strong contrast so your thumbnail pops against Facebook's dark Reels grid background
Text placement: Keep text large, short, and centered — small text becomes unreadable at thumbnail size and edge text gets cropped
Vertical composition: Design for the full 9:16 frame but prioritize the center 3:4 area where the grid thumbnail is taken from
Faces work: Thumbnails with expressive faces consistently get higher tap rates — place the face in the center of the frame
Consistent branding: Use a recognizable color scheme, font style, or layout template across your Reels covers so viewers recognize your content in the grid
Avoid clutter: The grid thumbnail is small — one strong focal point works better than many competing elements
Test at small size: Zoom out or view your cover at thumbnail scale to make sure it is still readable and compelling when small
The best Reels covers are designed twice — once for the full 9:16 playback view, and once for the cropped grid thumbnail. This tool lets you check both at the same time.
Frequently Asked Questions
What size should a Facebook Reels cover be?▼
The recommended size is 1080×1920 pixels with a 9:16 aspect ratio. Use the image size checker to verify. When displayed in the Reels grid, Facebook center-crops to ~3:4, so keep important content in the middle to avoid it being cut off.
Why is my Reels thumbnail being cropped?▼
Facebook crops your 9:16 cover to fit the grid (~3:4 ratio). The crop is center-aligned, hiding the top and bottom. Use the safe zone visualizer to see which parts are visible, or the image crop tool to reposition your content before publishing.
What aspect ratio works for Facebook Reels?▼
Facebook Reels use a 9:16 vertical aspect ratio (1080×1920 pixels). This is the same ratio used by Instagram Reels, TikTok, and YouTube Shorts. The full 9:16 frame is shown during playback, but the grid thumbnail is center-cropped to approximately 3:4, so you need to design for both views.
Can I change my Reels cover image after posting?▼
Yes. On Facebook, you can edit your Reel after posting to change the cover image. Tap the three-dot menu on your Reel, select "Edit", and choose a different frame from the video or upload a new custom cover image. The updated cover will replace the previous one everywhere the Reel appears.
How do I make my Reels thumbnail stand out?▼
Use high-contrast colors, bold centered text, and expressive faces. Keep important elements in the center safe zone (middle 60-70%). Use the thumbnail analyzer to check visual quality. Test your cover at thumbnail scale — if it's not compelling when small, redesign it with the free editor.