Social Media Image Size Checker - Free Online

A social media image size checker compares the pixel dimensions of your picture with the recommended sizes for placements such as Instagram posts, Facebook covers, YouTube thumbnails and LinkedIn banners. Upload one JPG, PNG, GIF or WebP file and you get a status for every placement, plus a crop preview, before you publish anything.

What Is Social Media Image Size?

Social media image size is the width and height, in pixels, that a platform recommends for a specific spot, such as a profile picture, cover photo or story. Each spot has its own dimensions and its own shape, called the aspect ratio.

Two things decide whether an image looks right. The first is resolution: if your file has fewer pixels than the placement expects, the platform enlarges it and the result looks soft. The second is aspect ratio, which is width divided by height. A 1080 by 1080 image has a 1:1 ratio, while a 1080 by 1920 story has a 9:16 ratio. If your ratio differs from the placement, the platform crops or pads the picture.

There is no single standard size. Sizes change by platform and by placement, and platforms update their layouts from time to time. That is why people search for a social media image sizes cheat sheet. This page gives you that reference and tests your own file against it at the same time.

How to Use the Social Media Image Size Checker

You only need an image file, and the report appears as soon as the file loads. Follow these steps.

1. Find the Upload Image box and drag your picture onto it, or click the box to browse your files.
2. Choose a JPG, PNG, GIF or WebP file that is 20 MB or smaller.
3. Check the preview and the pixel dimensions shown under it to confirm you picked the right file.
4. Scroll through the results list. Each row shows a platform, a placement, the recommended size and a status for your image.
5. Type a word such as facebook, story, banner or profile into the Filter platforms box to narrow the list to what you need.
6. Open a row to see a centered crop preview at the recommended size. Close it with the close button when you are done.
7. If a placement needs a different size, use the link to resize an image for a selected placement.

If you see an error saying the file cannot be decoded as an image, the file is damaged or is not a real image. Re-export it from your editor and upload it again.

Worked Example: Checking a 1600 by 900 Image

Say you exported a 1600 by 900 landscape banner from a design app. Its aspect ratio is 16:9. Here is what the checker reports for four placements and what each result means.

• X in-stream post (1600 by 900): an exact match, so the status is Pass.
• YouTube thumbnail (1280 by 720): the ratio is also 16:9 and your image is larger, so it passes. The platform scales it down cleanly.
• Facebook link share (1200 by 630): that placement is about 1.91:1, while your image is 1.78:1. The ratio is slightly off, so you see Wrong aspect. At 1200 pixels wide your image would be 675 pixels tall, so roughly 45 pixels in total would be trimmed from the top and bottom. The crop preview shows exactly what gets cut.
• Instagram story (1080 by 1920): your image is both smaller in height and the wrong shape, so it reports Too small and wrong aspect. Forcing a landscape picture into a tall frame would crop away most of it.

The takeaway: one export can serve several placements, but story and pin formats need their own vertical versions.

How Do You Read and Act on the Results?

Each placement gets one of four statuses, and each one points to a specific fix.

Pass

Pass means your image meets the preset for that placement. You can upload it as is. Still glance at the crop preview, because text or faces near the edges can be affected by different layouts on phones and desktops.

Wrong aspect

Wrong aspect means the shape differs from the placement. The platform will crop it, so important content may get cut off. The fix is to crop the image to the target ratio yourself, keeping the subject in the middle, or to place it on a canvas of the correct size.

Too small

Too small means the ratio is fine but you have fewer pixels than recommended. The platform will enlarge your image, which causes blur. Go back to the original file and export it at the full recommended size. Enlarging a small file in an editor does not add real detail.

Too small and wrong aspect

This status needs two fixes: start from a larger original, then crop to the right ratio. If you do not have a larger original, choose a placement whose preset is closer to what you have, such as a profile picture or a link share image.

Invalid image

If you see Invalid image, the file could not be read. Try saving it again as a JPG or PNG.

What Are the Standard Social Media Image Sizes in Pixels?

The most common sizes are 1080 by 1080 for square Instagram posts, 1200 by 630 for Facebook link shares and 1280 by 720 for YouTube thumbnails. The table lists some presets this checker uses.

The tool also covers placements on YouTube, TikTok, Snapchat, Reddit, Discord, Threads, Bluesky, Mastodon, WhatsApp and Telegram, along with a generic Open Graph image size for link previews.

Who Should Use This Checker?

Anyone who publishes images on more than one network gains from testing a file before it goes live. A few typical situations:

• Social media managers who reuse one campaign graphic across several networks and need to know which versions need a new crop.
• Bloggers and site owners who want a link preview image that matches the Open Graph size so shared posts look clean.
• Small business owners updating a profile picture and cover photo on several accounts in one sitting.
• Designers who want to confirm a client file is large enough before building layouts around it.
• YouTubers checking thumbnails and channel art before uploading.

If you still need to build the artwork, the social media banner maker can create a banner at the right dimensions to start with.

Best Practices and Common Mistakes

Most image problems come from skipping a quick check before upload. These habits prevent the usual ones.

• Start big, then scale down. Export from the original at the full recommended size. Scaling down keeps images sharp, while scaling up never does.
• Keep key content in the safe center. Banners and covers are cropped differently on mobile and desktop, so keep logos and faces away from the edges.
• Do not reuse one crop everywhere. A 1:1 image will fail on a 9:16 story and a 4:1 banner. Make a version for each shape.
• Filter before you scroll. With dozens of placements in the list, typing the platform name saves time.
• Watch text-heavy graphics. Small text in a profile picture or thumbnail becomes unreadable at small display sizes.
• Match the file to the goal. JPG suits photos, and PNG suits logos and sharp text.

When a placement fails and you do not want to edit the file by hand, the social media image resizer can produce the right size for you. After the visuals are ready, the social media character counter helps you check post text, and the best time to post calculator helps you choose when to publish.

Limitations to Keep in Mind

The checker uses planning presets, not a live feed from each platform. Networks change their layouts and recommended sizes, and the same image can be cropped differently on phones, tablets and desktops. Treat the results as a reliable guide and confirm the current upload requirements on the platform before a major launch.

The tool compares dimensions and shape. It does not judge image quality, file weight after compression or whether the artwork looks good. Platforms also recompress uploads, so a perfect Pass does not guarantee a pixel-perfect result.

Upload your image above to see where it passes and where it needs work. Fix any flagged placements, then browse more options in the YouTube and social media tools collection.