# Open Graph Checker

URL: https://tools.otaku-dojo.com/en/open-graph-checker
Updated: 2026-10-03

The Open Graph Checker reads a page's og: and twitter: tags, previews the card shown when the link is shared on Facebook, X (Twitter), LinkedIn, Discord or Slack, and checks that the share image exists, loads and meets the recommended 1200×630 pixels. When og:title or og:description is missing, it notes which fallback platforms will use.

## How to use the Open Graph Checker

1. Enter the URL you want to share and press "Check".
2. "Share preview" simulates the card social platforms display.
3. Review each tag in the Open Graph and X Card tables; yellow and red items should be added.
4. After updating your site, use Facebook's Sharing Debugger "Scrape Again" so platforms refresh their cache.

## Specs & key facts

- **Tags checked**: og:title, og:description, og:image, og:url, og:type, og:site_name, og:locale, twitter:card / title / description / image
- **Image check**: Loads og:image and reports its pixel size
- **Recommended size**: 1200 × 630 px (1.91:1), at least 600 × 315
- **Read limit**: Follows redirects, analyzes the first 512 KB
- **Limits**: JavaScript is not executed; public URLs only
- **Price**: Free, no sign-up

## Examples: Minimal Open Graph setup

```html
https://example.com/post/123
```

→

```html
<meta property="og:title" content="Post title">
<meta property="og:description" content="One-line summary">
<meta property="og:image" content="https://example.com/og/123.png">
<meta property="og:url" content="https://example.com/post/123">
<meta property="og:type" content="article">
<meta name="twitter:card" content="summary_large_image">
```

## FAQ

### I changed og:image but Facebook still shows the old one. Why?

Platforms cache share data. Open Facebook's Sharing Debugger, enter the URL and press "Scrape Again"; for other apps, adding a query string such as ?v=2 forces a refresh.

### Does og:image need an absolute URL?

Yes. Use a full https:// URL — relative paths fail on many platforms.

### What is the best share image size?

1200 × 630 px (1.91:1) works across Facebook, X, LinkedIn and Discord; keep it under 5 MB as JPG or PNG.

### Why does the image fail to load?

The URL may be wrong, the server may block hotlinking, or the image may require a login. Social platforms will hit the same problem.