Real share-card previews
Open Graph, Twitter/X Cards, the native macOS link preview, plus Slack, Discord, LinkedIn and WhatsApp — all rendered the way each platform really shows them.
macOS 14+ · Native app
See how your link looks before you share it.
Paste any URL and Web Metatag Viewer renders the real share cards — Open Graph, Twitter/X, Slack, Discord, LinkedIn, WhatsApp, the native macOS preview, and a Google result — then validates your meta tags and tells you exactly what to fix.
<meta property="og:title" content="Looks great. ✓">
Features
More than a viewer — an optimizer.
Meta-tag validator
A built-in rule engine flags missing, duplicate or oversized tags — Open Graph, Twitter Card, canonical, viewport, image URLs — with ranked, actionable fixes.
Google result preview
See the breadcrumb URL, title and snippet exactly as they'd appear in a search result, so your page reads well everywhere.
One-click copy & export
Copy any tag's value or HTML, the full <meta> block, the optimization report, or a ready-to-paste prompt that tells your code editor how to fix the tags.
Recent history
Every URL you inspect is remembered and one click away from the search bar.
Private & sandboxed
Runs sandboxed with outbound network access only — it reads pages to inspect their tags and never writes your files or tracks you.
Screenshots
A native macOS window, nothing more.
Support
Questions & help
What does Web Metatag Viewer do?
You type a web address; the app loads the page, reads its <meta> tags, title and first image, and renders how the page will look when shared across major platforms. It also validates the tags and suggests fixes.
Which macOS versions are supported?
macOS 14 (Sonoma) and later. It's a native, sandboxed SwiftUI app distributed through the Mac App Store.
How does it read a page's tags? Is my data private?
The app loads the page you ask for in a hidden web view and reads the tags locally on your Mac. It needs outbound network access to fetch pages, but it can't write to your files and doesn't track you or collect analytics.
What can I export?
Any individual tag's value or HTML, the complete <meta> block, a full optimization report, or a self-contained prompt you can paste into your code editor to apply the suggested fixes.
It rejected my http:// URL — why?
For safety the app only loads secure pages. Bare hosts like example.com are upgraded to https:// automatically; plain http:// addresses are declined.
How do I report a bug or request a feature?
Email [email protected] with what you were doing and the URL you were inspecting. I read every message.