Link Preview Testing Tools — Free Tools to Check Open Graph & Metadata
Several tools exist to test how links appear when shared. Each serves a slightly different purpose. This guide explains what each tool does, when to use it, and how they compare.
TryUnfurl.com — All Platforms at Once
TryUnfurl.com is a free link preview checker that shows all platform previews simultaneously — no login required.
What it does:
- Fetches any public URL server-side (no JavaScript execution — same as real crawlers)
- Renders preview cards for Twitter/X, Facebook, LinkedIn, Slack, Discord, and iMessage
- Shows all detected metadata: Open Graph, Twitter Cards, HTML meta tags, and favicon
- Always fetches the live page — no internal cache
- Stores recent URLs in browser local storage only — no account needed
Best for:
- Checking all platforms at once before any share
- Diagnosing why a preview looks wrong
- Verifying metadata after a deploy
- Testing any URL — your own or a competitor's
Platform-Specific Debugging Tools
Each major platform provides its own official tool. These are useful for forcing a cache refresh after you've confirmed your metadata is correct.
Facebook Sharing Debugger
URL: developers.facebook.com/tools/debug
Requires: Facebook account
- Shows exactly how Facebook reads your page's Open Graph tags
- Lets you force a cache refresh with Scrape Again
- Shows error messages for invalid or missing tags
- Useful for: fixing Facebook-specific preview problems and clearing cached previews
Twitter / X Card Validator
URL: cards-dev.twitter.com/validator
Requires: X (Twitter) account
- Validates Twitter Card tags and shows a real Twitter card preview
- Each validation re-fetches the page, effectively clearing X's cache
- Useful for: verifying
twitter:cardtype is correct, checking Twitter-specific image rendering
LinkedIn Post Inspector
URL: linkedin.com/post-inspector
Requires: LinkedIn account
- Shows how LinkedIn reads your Open Graph tags
- Has a Regenerate preview button to force a cache refresh
- Useful for: fixing LinkedIn-specific preview issues (LinkedIn is stricter about minimum image sizes)
Google Rich Results Test
URL: search.google.com/test/rich-results
Requires: No account
- Validates structured data (Schema.org / JSON-LD)
- Shows how Google interprets your page for rich results in search
- Useful for: testing structured data, not link preview cards
Tool Comparison
| Feature | TryUnfurl | Facebook Debugger | X Card Validator | LinkedIn Inspector |
|---|---|---|---|---|
| Shows all platforms | Yes | No | No | No |
| Requires login | No | Yes | Yes | Yes |
| Forces cache refresh | No (fetches live always) | Yes | Yes | Yes |
| Shows raw metadata | Yes | Partial | Partial | Partial |
| Works for any URL | Yes | Yes | Yes | Yes |
| Free | Yes | Yes | Yes | Yes |
Recommended Workflow
1. Use TryUnfurl first — confirms your metadata is correct and shows all platforms at once, without needing any accounts.
2. Fix metadata issues — update your Open Graph tags, redeploy, and re-test on TryUnfurl until everything looks correct.
3. Use platform tools to clear caches — once your metadata is verified, use the Facebook Sharing Debugger, Twitter Card Validator, and LinkedIn Post Inspector to force each platform to re-fetch your updated tags.
This workflow saves time by not juggling multiple accounts and platforms until you've already confirmed the metadata is right.