Open Graph preview. Five platforms. One view.
Paste a URL's meta tags or type them in. See live Facebook, X, LinkedIn, Slack, and Discord previews side-by-side with a quality score and platform-specific safe-zone warnings.
Paste HTML <head> or meta tags
Five platforms. Five crops.
Open Graph is the meta-tag protocol every social network, every messaging app, and every link-preview consumer reads when a URL is shared. One set of tags, five platforms, five slightly different crops. Facebook and LinkedIn show the full image with title below. X with summary_large_image overlays the title on the image. Slack and Discord show a compressed card with image below the text. The preview tool above renders all five simultaneously so you see each one without deploying first.
Four image rules. 1200 by 630 pixels, 1.91:1 aspect. Critical text inside the center safe zone (90 percent width and 80 percent height). File size under 300 KB ideally, 8 MB maximum. High-contrast text for thumbnail legibility. The quality score above penalizes deviation from these four on a 0-to-100 scale; a score below 85 means one of the four is missing or off-spec.
Post-deployment verification is not optional. Use Facebook Sharing Debugger, LinkedIn Post Inspector, and X Card Validator to force re-scrape after changing tags. Facebook caches for weeks; an updated OG image will not show until the cache is cleared.
Tools in the same cluster: Meta tag generator for the tag-authoring step. Schema generator for the JSON-LD layer that sits next to OG.
Five answers.
What is Open Graph?
Open Graph is the meta-tag protocol introduced by Facebook in 2010 and now adopted by most social platforms, messaging apps, and link-preview consumers. When a URL is shared, the parser fetches the page and reads Open Graph tags (og:title, og:description, og:image, og:url, og:type) to build the preview card. Twitter, LinkedIn, Slack, Discord, iMessage, and WhatsApp all parse Open Graph tags; some add platform-specific overrides (twitter:card, etc.) but a complete OG block covers 95 percent of real-world previews.
Why do different platforms show different previews for the same URL?
Each platform caches independently and crops images differently. Facebook and LinkedIn honor the full 1200 by 630 image and crop minimally. X summary-large-image crops roughly 15 percent top and bottom. Slack uses 1200 by 630 but trims borders. Discord scales aggressively on mobile. iMessage shows a square crop. Caching is the other difference: Facebook caches for weeks, LinkedIn for days, Slack per-workspace. Updated tags require hitting each platform's debugger to force a re-scrape.
What makes a good OG image?
Four rules. Dimensions: 1200 by 630 pixels, 1.91:1 aspect. Text placement: any important text inside a center safe zone of 90 percent width and 80 percent height, because LinkedIn and iMessage crop edges. File size: under 8 MB, ideally under 300 KB for fast parser fetches. Contrast: high-contrast between text and background for legibility at thumbnail size. The quality score above scores against these four criteria plus OGP spec completeness.
How do I force Facebook to re-scrape my URL?
Use the official Facebook Sharing Debugger at developers.facebook.com/tools/debug. Enter the URL, click Scrape Again, and the cache clears. LinkedIn has a similar Post Inspector. X has the Card Validator. Slack re-scrapes automatically on most messages; if the old preview persists, the workspace admin can force a cache clear. Never rely on share dialogs for debugging; always use the official inspector per platform.
Does this tool save my data?
No. Every value you enter lives in memory for this browser tab only. Nothing is transmitted to a server, stored in a database, or synced. Close the tab and the data is gone. This tool does not fetch remote URLs either; it previews the tags you paste in so your draft content stays private until you deploy.
Every page needs one.
Our SEO engagements build dynamic OG-image pipelines (Vercel OG, Cloudinary, Shopify metafields) so every page ships a unique, spec-correct share card without manual work per post.