Link Preview Tester
Paste any URL and see exactly how it will unfurl on Slack, X (Twitter), Facebook, iMessage, and LinkedIn. Get a validation report with the fixes for any missing OG tags or oversized titles.
Used this tool?
Save your URL previews and validation reports to your library — free, no card.
Under the hood
How it works
From URL to 5 platform previews in under a second. Here's what the server does between your click and the result.
Safe fetch
The URL goes through an SSRF-protected fetcher: 5s timeout, up to 3 redirects, max 2MB body. Private IPs and localhost are blocked.
- 5-second timeout
- SSRF + blocked-domain checks
Parse metadata
Cheerio extracts every og:* and twitter:* meta tag, plus the fallback <title> and <meta description>.
- OG + Twitter card + favicon
- Validation report with score
Render previews
The five platform mockups render from the same parsed shape, so what you see is exactly what your viewers will get on each app — no platform-specific stale guesses.
- Slack · X · Facebook · iMessage · LinkedIn
- One shared data shape, no drift
Your URL is cached for 24 hours so re-runs are instant and free. Click Re-fetch on the result panel to bypass the cache and pull a fresh copy after you change your meta tags.
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