SEO tool5-platform previewLive tag check

OG Image & Social Share Preview Validator

Enter a URL to fetch and parse its Open Graph / Twitter Card tags, preview how it looks when shared on Facebook, X, LinkedIn, Discord and Slack, and validate the og:image dimensions, ratio, file size and format. You can also upload a single image to validate on its own.

Good for these cases

Best for checking share appearance before publishing, not for bulk monitoring.

Your shared link shows no image or title on social platforms and you want to debug the OG tags.

Before publishing an article or landing page, you want to see how it will look when shared on each platform.

You want to confirm the og:image dimensions, ratio and size meet each platform's requirements to improve click-through.

Page URL

Enter the full URL (including https://) whose share appearance you want to check.

Enter a URL to start

Paste a publicly accessible page URL and we'll fetch its OG / Twitter tags and preview the share cards for each platform.

What it checks

Validates Open Graph, Twitter Card and basic SEO tags, covering the share cards of Facebook, X, LinkedIn, Discord and Slack.

•Fetch the Open Graph and Twitter Card tags of any URL
•Preview share cards for Facebook, X, LinkedIn, Discord and Slack
•Validate og:image dimensions, ratio (1.91:1), file size and format
•Per-platform pass / warning / fail diagnostics
•Upload an image to validate dimensions and ratio offline
•Resolve twitter:image→og:image and og:title→title fallbacks

How to use

Follow the steps below to run a check.

1Switch to "From URL" and paste the page URL you want to check.
2Click Check and wait while we fetch and parse the page's OG / Twitter tags.
3Review the per-platform share-card previews and the dimension, ratio, size and tag report.
4Or switch to "Upload image" to validate a single image against each platform's spec.

Notes

A few notes before you use it.

URL mode needs the server to fetch the target page for you (to bypass browser cross-origin limits); it reads public content only and stores nothing.

Private, loopback and internal-network addresses are blocked by the safety policy and can't be fetched.

Upload mode validates entirely in your browser; the image never leaves your device.

FAQ

A few common questions before you start.

How is my data handled when validating a URL?

URL mode fetches the target page on the server to parse its tags (browsers can't fetch cross-origin pages); it only reads public page content and stores nothing. Upload mode runs entirely in your browser and never uploads the image.

Why can't some sites be parsed?

Some sites return stripped-down content to non-browser requests, or inject OG tags via JavaScript; such pages may not expose complete tags, which is expected.

What's the recommended og:image size?

1200×630 pixels with roughly a 1.91:1 ratio is the common recommendation. Below 600×315 some platforms show a small card, and below 200×200 the image is generally not picked up.

What are the image file-size limits per platform?

Roughly 8MB for Facebook / Discord and 5MB for X / LinkedIn / Slack. Always defer to each platform's official docs; this tool flags issues against those thresholds.