OGImageSize
Turn links into clean social previews
About OGImageSize
Open Graph images are the small piece of web plumbing that everyone gets wrong and nobody notices until a link is already shared. You post a URL, and instead of the designed card you expected, the platform shows a cropped fragment, the wrong image entirely, or nothing at all. By then the post is live. OGImageSize covers the whole loop: generating a correctly sized image, producing the meta tags, and testing what a platform will actually render before you publish anything.
The value here is in knowing the specific failure modes, which the issue checklist demonstrates. It flags whether the image URL is absolute rather than relative, which is the single most common cause of a missing card. It checks whether og:image:width and og:image:height are declared, which platforms use to decide layout. And it prompts you to refresh the platform cache, which is why a fixed card so often still shows the old broken version. Those three points cover most real-world OG failures. The generator produces the standard 1200 by 630 at the 1.91:1 ratio, with a safe zone indicator so text is not cropped on platforms that crop differently.
Start from the URL you intend to share. Generate a 1200 by 630 image using the size generator, working within the indicated safe zone so nothing important sits where a platform will crop it. Build the meta tags with the tag generator, covering og:title, og:description and og:image, and copy them into your page head. Then run the preview tester against the live URL to see what will actually be rendered rather than what you assumed. Work through the issue checklist for the three things that usually break cards: relative image URLs, missing width and height declarations, and stale platform caches. Size guides document the current requirements per platform.
- •1200x630 Image Generator - Produces the standard Open Graph size at the correct 1.91:1 ratio
- •Safe Zone Indicator - Shows where text will survive cropping across platforms that crop differently
- •Meta Tag Generator - Builds og:title, og:description and og:image tags ready to paste
- •Live Preview Tester - See what a platform will actually render for a URL before sharing it
- •Issue Checklist - Flags absolute URL requirements, missing width and height, and stale caches, which cover most real failures
- •Per-Platform Size Guides - Documented current requirements rather than remembered folklore
- •Complete Workflow - Generate, tag and verify in one place instead of three separate tools
- •Free to Start - Usable without payment
For developers and marketers shipping pages that will be shared on social platforms, which is essentially all of them, and especially for anyone who has watched a launch post render with a broken preview. It suits content teams publishing regularly, where the same mistake repeats across every article. Agencies can verify client sites before campaigns go live. The preview tester alone is worth using before any significant launch, since the alternative is discovering the problem from whoever shares it first.
Pricing
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Free to start - the pricing page returns 404, so paid plan details could not be verified
Checked 2026-09-19
