Open Graph Preview — see how your link looks when shared
Paste any URL and see a pixel-honest preview of how it unfurls on X, Facebook, LinkedIn, Slack, Discord, and iMessage — plus exactly which Open Graph tags to fix.
How it works
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Paste any URL
A landing page, a blog post, a product page — anything public. We fetch the page like a social crawler would; nothing is stored.
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See every platform at once
We read the page's Open Graph and Twitter Card tags and render an accurate preview for each network, applying the same fallback rules they do.
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Fix what's flagged
A plain-English checklist calls out a missing og:image, a relative image URL, an over-long title, wrong image dimensions, and more — so your link earns the click.
What a link preview actually is
When you paste a URL into X, Slack, LinkedIn, an iMessage, or a Discord
channel, that app quietly fetches the page and reads a handful of
<meta> tags — the Open Graph and Twitter Card tags — to
build the little card everyone sees: an image, a headline, a sentence, a
domain. Those tags are the difference between a link that stops the scroll
and a bare blue URL nobody clicks. This tool shows you that card, on every
major platform, for any page — before you hit share.
Honest previews, not a generic mock-up
Every platform applies its own rules: X falls back to Open Graph when there's
no twitter:card; Facebook uppercases the domain and shows the
description; LinkedIn hides the description entirely; Slack and Discord paint
a colored bar from your theme-color. This tool replicates those
rules per platform, so the preview you see is the preview your audience gets —
not one idealized template reused six times.
It checks your image for real
The most common — and most costly — mistake is the image. A relative path, an
http:// URL, or a file that's too small, and platforms silently
drop it, turning a rich card into a plain text row. This tool loads your
actual og:image and reports its true dimensions, then tells you
whether it clears the recommended 1200×630, sits at the right 1.91:1 ratio,
and is served over HTTPS.
A checklist, in plain English
- Missing tags — no
og:image,og:title, orog:descriptionis flagged, with the fallback each platform would use instead. - Broken image URLs — relative or non-HTTPS
og:imagevalues that platforms will ignore. - Length & ratio — titles that will truncate, descriptions that get trimmed, images that will be cropped.
- Twitter specifics — whether
twitter:cardis set for a big summary-large-image card. - Accessibility — a missing
og:image:alton the platforms that read it.
Private by design
The page is fetched through Monity's relay only to move the HTML into your browser, where all the parsing happens. Nothing about the URL is stored, and there's no account. It's the fast, no-friction way to sanity-check a link before a launch, a campaign, or a big announcement.
Previews break silently — Monity catches it
You can get every tag perfect today and lose it tomorrow. A theme update, a
CMS migration, or a CDN change can strip your og:image without a
single visible error on the page — and every link you've ever shared quietly
starts unfurling blank. This tool is the manual check;
Monity is the automatic one, watching your
key pages 24/7 and alerting you in Slack, Teams, or email the moment the tags
change. The free plan watches 3 pages, forever.
FAQ
Common questions
What are Open Graph tags?
Open Graph (OG) tags are <meta> tags in a page's HTML — og:title, og:description, og:image and friends — that tell social platforms and chat apps how to display your link when someone shares it. Twitter/X adds its own twitter:card tags. Get them right and your link unfurls into a rich card with a big image; get them wrong and it shows up as a bare, low-engagement text row.
Why does my preview here differ from what I see on X or Facebook?
Two reasons. First, the platforms cache aggressively — they may still be showing an old scrape. Use each platform's own debugger (Facebook's Sharing Debugger, X's Card Validator) to force a re-scrape after you fix your tags. Second, this tool always fetches the live page right now, so it reflects your latest deploy immediately.
What size should my og:image be?
1200×630 pixels (a 1.91:1 ratio) is the sweet spot for a large card across every major platform, and it stays sharp on retina screens. Keep it above 600×315 at a minimum, use an absolute HTTPS URL (relative paths are ignored by most platforms), and keep the file under ~5 MB. This tool loads your real image and reports its actual dimensions.
Is my URL or any data stored?
No. The page is fetched through Monity's relay purely to move the HTML to your browser, where all the parsing happens — nothing about the URL is stored, and there's no account. The relay is rate-limited to keep the tool fast and prevent abuse.
Can I get alerted when my share preview breaks?
Yes — that's what Monity is for. A redeploy, a CMS migration, or a CDN change can silently strip your og:image and quietly tank your click-through everywhere your links get shared. Monity watches the page 24/7 and alerts you in Slack, Teams, or email the moment the tags change. The free plan includes 3 monitors forever.
Your og:image can vanish on any deploy.
Monity tells you the moment it does.
Monity watches your key pages and alerts you in Slack, Teams, or email the moment an OG tag changes — before a broken preview costs you clicks.
- Free 7-day trial
- No credit card
- 3 monitors free, forever