Free SEO Tool
Free Link Preview Checker
Preview any link or URL before you share it. Check how your preview link appears on Facebook, X/Twitter, LinkedIn, Slack, and Google Search.
Why Use a Link Preview Checker?
A link preview checker shows the card that platforms build when they crawl your URL. Before you publish a campaign, newsletter, launch post, or support article, you can preview the link and catch missing titles, broken images, weak descriptions, or platform-specific truncation.
Our free link preview tool helps you see exactly how your content appears across all major platforms before you share. Use it as a URL preview tool, social link checker, Open Graph tester, and Twitter/X card previewer in one place.
- Test how your links appear before sharing on social media
- Preview any URL before a campaign, newsletter, or product launch
- Debug missing or incorrect Open Graph and Twitter Card tags
- Preview across Facebook, Twitter/X, LinkedIn, Slack, and Google
- Edit metadata in real-time to see how changes look
- Copy properly formatted meta tags for your website
Understanding Open Graph Tags
Open Graph (OG) tags are snippets of code that control how URLs are displayed when shared on social media. The most important tags include:
og:title- The title of your content (recommended: 60 characters max)og:description- A brief description (recommended: 155 characters max)og:image- The image URL (recommended: 1200x630 pixels)og:url- The canonical URL of your page
Twitter Card Meta Tags
Twitter (now X) uses its own set of meta tags, though it falls back to Open Graph if Twitter-specific tags aren't present. The main Twitter card types are:
- Summary Card - A compact card with a small square image
- Summary Card with Large Image - Features a prominently displayed image (most common)
Platform-Specific Considerations
Each platform has its own quirks when rendering link previews:
- Facebook - Caches previews aggressively. Use their Sharing Debugger to clear the cache.
- LinkedIn - In 2024, organic posts show smaller thumbnail previews. Only sponsored posts get full-width images.
- Slack - Shows a colored sidebar based on your site's theme color. Supports additional metadata like author and reading time.
- Google - Uses title and meta description for search results, not Open Graph tags.
Generate Preview Images Automatically
If your page is missing a strong preview image, you can generate one from the page itself. Use the Open Graph preview tool to test tags visually, or use the screenshot automation API to create fresh social images from URLs programmatically.
Frequently Asked Questions
Why does my link preview look different on each platform?
Each social platform has its own way of displaying link previews. Facebook, Twitter, LinkedIn, and Slack all use different image aspect ratios, text truncation rules, and styling. That's why it's important to test your links on multiple platforms before sharing.
What size should my og:image be?
The recommended size for og:image is 1200x630 pixels (1.91:1 aspect ratio). This size works well across Facebook, Twitter, and LinkedIn. For Twitter specifically, a 2:1 aspect ratio (1200x600) also works great for Summary Card with Large Image.
How do I update my link preview after changing meta tags?
Most platforms cache link previews. To update them: For Facebook, use the Facebook Sharing Debugger and click 'Scrape Again'. For Twitter, use the Twitter Card Validator. For LinkedIn, use the Post Inspector tool. For Slack, simply share the link again - Slack recrawls periodically.
My og:image is not showing. What's wrong?
Common issues include: the image URL is not absolute (must start with https://), the image is too small (minimum 200x200 pixels), the image takes too long to load, or the image URL is blocked by robots.txt. Also ensure your server returns proper CORS headers.
What's the difference between Open Graph and Twitter Cards?
Open Graph tags (og:) are a standard created by Facebook that most platforms support. Twitter Cards (twitter:) are Twitter-specific tags. Twitter will use its own tags if present, otherwise it falls back to Open Graph. For best results, include both sets of tags.
Do I need to add meta tags for Google Search?
Google Search doesn't use Open Graph tags. It uses the standard <title> tag and meta description for search result snippets. However, Google may display images from your page in search results based on various factors including structured data markup.
How can I generate an og:image automatically?
If you don't have a custom og:image, you can use a screenshot API like Allscreenshots to automatically capture a screenshot of your page. Many websites use this approach to dynamically generate preview images for blog posts or product pages.
Is this tool free to use?
Yes! This link preview checker is completely free with no usage limits. It's powered by Allscreenshots' Screenshot API, which offers a generous free tier if you need to programmatically generate og:images.
Need to generate og:images at scale?
Use our Screenshot API to automatically generate preview images for thousands of pages. Perfect for blogs, e-commerce sites, and documentation.
Free tier includes 100 lifetime screenshot credits. No credit card required.