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SEO

Open Graph Image Preview

Details

How to use Open Graph Image Preview

What the tool does, how to run it, and what to expect from the result.

How to check an Open Graph image

To check an Open Graph image, open the tool and either upload a file or paste a direct image URL. Open Graph Image Preview reads the image dimensions and aspect ratio and tells you how close the asset is to a practical share-card target, so you can spot a too-small or oddly-shaped image before it goes live.

When you upload a file, the image is inspected locally in your browser rather than sent to a server. That keeps unreleased artwork and draft share cards private while you confirm the size is right.

  • Upload an image file or paste a direct image URL
  • Read the reported pixel dimensions and aspect ratio
  • Compare against a practical Open Graph shape
  • Resize the source if it falls short and re-check

How this differs from Open Graph Preview

Open Graph Image Preview focuses on the image asset itself: its size, ratio, and whether it looks close to a practical share-card target. The companion Open Graph Preview tool works on pasted metadata tags and renders a full card layout from them.

Use this image tool when you want to validate a single picture before you reference it in your tags. It gives practical asset guidance rather than a platform-perfect render, because each network crops and scales images slightly differently.

Tips

Getting a better result out of Open Graph Image Preview

Specific settings and thresholds, not general advice.

  • The ratio check targets 1200 by 630, a decimal ratio of 1.905, and warns when your image is more than 0.08 away from it. A standard 16:9 image sits at 1.778, outside that band, and is flagged. That is correct, not a false positive: 16:9 gets cropped on Facebook and LinkedIn link cards.
  • The size warning fires below 1200 wide or 630 tall. Facebook's own floor for a large card is 600 by 315, and an image under that drops to a small square thumbnail beside the text instead of a full-width card.
  • File size is only reported for uploaded files. When you paste a direct image URL the browser loads it to read the dimensions but never measures the bytes, and Facebook rejects images over 8 MB.
  • The URL field needs a link to the image file itself, not to the page it appears on. Paste an article URL and the load fails with a browser error, because there is no image at that address to decode.
  • The displayed ratio is a real greatest-common-divisor reduction, so 1200 by 630 shows as 40:21 rather than 1.91:1. An odd looking reduced ratio is itself a signal that the asset was never exported to a target size.
Limits

What Open Graph Image Preview does not do

The honest boundary, so you do not lose time finding it yourself.

  • One image at a time. There is no batch mode.
  • Uploads accept PNG, JPEG, WebP, GIF and BMP. SVG, HEIC and AVIF are not accepted.
  • Does not read the og:image tag from a page URL. You supply the image, not the page.
  • Does not measure file size for URL input, does not check text safe areas, and does not simulate how any specific network crops the card.
Reference

Terms used on this page

Short, plain-language definitions for the formats and settings above.

Web & SEOOpen Graph tagsOpen Graph tags are HTML meta tags (og:title, og:description, og:image, og:url) that control how a page looks when shared on social platforms and chat apps. They set the title, summary, and preview image of the link card instead of leaving it to guesswork.GeneralPhotos & videoImage resolutionImage resolution is the pixel dimensions of a photo — its width by height, such as 4032 × 3024. Higher resolution holds more detail but takes more storage, so larger images make a photo library grow faster.GeneralPhotos & videoAspect ratioAspect ratio is the proportional relationship between an image or video’s width and height, written as two numbers like 4:3 or 16:9. It shapes how a photo fills the frame and has a smaller effect on file size than resolution or quality.General
At a glance

Who Open Graph Image Preview is for

A quick way to understand who this helps, what it solves, and where it connects next.

Best fit

Marketers, SEO operators, designers, and founders preparing social share assets before publishing.

Ideal for

Checking whether one image is large enough and shaped correctly for a typical share card.

FAQ

Common questions

Short answers for the questions people usually have before trying a utility like this.

Is Open Graph Image Preview free?

Yes. Open Graph Image Preview is completely free, with no signup, and it runs in your browser.

Does it upload my image to a server?

No. When you upload a file it is inspected locally in your browser, so the image stays on your device.

Can I use a direct image URL?

Yes. Open Graph Image Preview accepts either a local file upload or a direct image URL.

Does it simulate Facebook or X exactly?

No. It provides practical image-asset guidance on size and aspect ratio rather than a pixel-perfect render of any single platform.

What makes a good Open Graph image?

A large, landscape image with a roughly 1.91 to 1 aspect ratio is a safe target. The tool reports your image's dimensions and ratio so you can compare against that shape.

What size should an Open Graph image be?

1200 by 630 pixels, a ratio of about 1.91:1, is the safe default across Facebook, LinkedIn, Slack and X summary cards. The hard floor for a large card on Facebook is 600 by 315. Below that you get a small thumbnail. Above 1200 wide there is no benefit beyond retina sharpness and a larger file.

Why is my 1920 by 1080 image flagged?

Because 16:9 is 1.778 and the Open Graph target is 1.905. The difference is more than the 0.08 tolerance, so the tool warns. In practice a 16:9 image gets centre-cropped top and bottom on a link card, which is fine for a photograph and fatal for a card with text near the edges.

Does it check the og:image tag on my page?

No. This page is about the image asset itself: its dimensions, its ratio, and whether it fits a share card. Checking the tags in your head markup is a different job, done by the Open Graph Preview tool.

Why did my image URL fail to load?

Usually one of three reasons. The URL points at a page rather than an image file. The host blocks hotlinking, so the browser is refused. Or the image is behind authentication and your browser cannot fetch it anonymously. Download the image and upload it instead.

Is my image uploaded anywhere?

No. An uploaded file is read locally by your browser to get its dimensions and is never sent to a server. A pasted image URL is fetched directly by your browser from whatever host it lives on, exactly as if you had opened it in a tab.

Does file size matter for a share card?

Yes. Facebook rejects images over 8 MB and X is stricter still. The tool shows a file size for uploads so you can see where you stand, but it does not enforce a limit, and it cannot see the size of an image you supplied as a URL.

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