Tool / Open Graph Debugger
OG Tag Checker: Free Open Graph Preview
Free OG check and open graph validator. Run an instant og test or ogchecker scan to preview how links look on Twitter, LinkedIn, Slack, and Facebook.
What this tool checks
Every OG tag, social preview, and SEO signal — in one inspector.
OG Tag Checker
Inspect every og:title, og:description, og:image, and og:url tag in one click.
OG Image Tester
Validates status codes, file size, content type, HTTPS, and load time on your og:image.
Social Card Preview
Live Open Graph and Twitter card previews — exactly how Facebook, LinkedIn, and X will render your link.
Twitter Card Validator
Checks twitter:title, twitter:description, and twitter:image with a side-by-side card preview.
Redirect Chain Analyzer
Traces every 301 / 302 hop from your URL to the final destination, flagging chains that waste crawl budget.
Robots Tag Auditor
Reads meta robots and X-Robots-Tag headers — instantly surfaces noindex and nofollow directives.
Title Tag Auditor
Measures character length, flags too-short or truncated titles, and renders a live SERP snippet preview.
Structured Data Checker
Detects JSON-LD blocks and expands each schema type so you can verify rich result eligibility at a glance.
Canonical URL Inspector
Surfaces the canonical tag so you can confirm the correct page is being signaled to search engines.
Meta Tag Debugger
Full read-out of every relevant meta tag — one tool, no browser extensions required.
Open Graph & Social Preview FAQs
Common issues when testing and validating social preview metadata.
What is an OG checker (open graph validator)?+
An OG checker (also known as an open graph validator, og tester, or ogchecker) is a developer utility that parses the Open Graph (<meta property="og:*">) tags and Twitter card markup in your webpage's <head>. It runs an automated og check to preview how URLs appear when shared on LinkedIn, Twitter/X, Facebook, Discord, and Slack.
Why does my og test fail or display a blank preview image?+
An og test fails most frequently because: 1) The og:image uses a relative path instead of an absolute HTTPS URL, 2) The image exceeds social network payload limits (over 300KB or 5MB), 3) The image URL returns a 404/redirect, or 4) The platform bot is serving a stale cached response. Our og checker flags these syntax and network errors immediately.
What are the recommended dimensions for an Open Graph image?+
The universal recommended size for Open Graph social preview images is 1200 x 630 pixels (1.91:1 aspect ratio). This resolution guarantees retina sharpness on desktop feeds and smartphones. Keep important text and logos centered within a 1200 x 540 pixel safe zone to avoid edge clipping.
How do I force Twitter, LinkedIn, and Facebook to refresh their og test cache?+
Social networks cache scraped metadata for up to 30 days. To force an immediate refresh, use the official platform debuggers (LinkedIn Post Inspector, Facebook Sharing Debugger) or run an og test with a cache-busting query parameter like ?v=2 appended to your image URL.
Need help configuring dynamic OG tags in Next.js?
Read our step-by-step tutorial on metadata generation and cache busting.