There are more Open Graph and OG image checkers than most people expect, and they are not interchangeable. Some show you what one specific platform cached. Others simulate previews across many platforms. A few can force a cache refresh — most cannot. Picking the wrong tool for the job is why "but the debugger said it was fine" is such a common sentence.
This is a comparison of the tools people actually use, including our own. Where a competitor does something better, we say so.
The contenders at a glance
| Tool | Platforms shown | Forces cache refresh | Login required | Free |
|---|---|---|---|---|
| OpenGraph Check | Facebook, X, LinkedIn, WhatsApp, Discord, Slack | No | No | Yes |
| Facebook Sharing Debugger | Facebook only | Yes (Facebook) | Facebook account | Yes |
| LinkedIn Post Inspector | LinkedIn only | Yes (LinkedIn) | LinkedIn account | Yes |
| opengraph.xyz | Facebook, X, LinkedIn, Discord | No | No, with limits | Freemium |
| metatags.io | Google, Facebook, X, LinkedIn | No | No | Yes |
The single most important distinction: official platform debuggers read from and write to that platform's cache. Third-party tools — including ours — simulate the preview from your live HTML. Both views are useful; they answer different questions.
Facebook Sharing Debugger
The Sharing Debugger is the authoritative answer for one question: what does Facebook currently have cached for this URL? It shows the scraped tags, the canonical URL Facebook resolved, any crawler errors — and, crucially, the Scrape Again button, which is the only reliable way to make Facebook drop an outdated preview.
Its limits are just as clear. It covers exactly one platform, requires a Facebook login, and shows you the cached state rather than what a fresh share would produce. If your tags are broken, it tells you Facebook saw broken tags — it is less helpful at explaining what to fix.
Use it when: a Facebook preview is stale and you need to force a refresh, or you suspect Facebook's crawler specifically is being blocked.
LinkedIn Post Inspector
The Post Inspector is LinkedIn's equivalent: paste a URL, see what LinkedIn extracted, and trigger a re-scrape. LinkedIn's cache is notoriously sticky — previews can persist for weeks — so this re-scrape ability matters more here than on any other platform.
Same trade-offs: one platform, login required, and the output is fairly terse about why something failed.
Use it when: LinkedIn shows an old title or image after you have already fixed your tags.
opengraph.xyz — and when you want an alternative
Probably the best-known third-party OG image checker: well made, with clean multi-platform previews and an OG image template gallery. It covers fewer chat platforms than we do (no WhatsApp or Slack preview) and gates some features behind a paid plan, but the core check is solid and the design is pleasant.
The most common reasons people search for an opengraph.xyz alternative: the free tier's limits, missing WhatsApp/Slack/Discord coverage, and wanting a validator that explains fixes instead of only rendering previews — which is exactly the gap the other tools in this list fill.
Use it when: you want a second opinion from another simulator, or you are shopping for OG image templates.
metatags.io
The veteran of the category, around since 2017. Its distinguishing feature is a live tag editor: change the title or description in the browser and watch the previews update, which is genuinely useful when drafting copy. It also previews the Google search result snippet, which most OG tools skip. Platform coverage is smaller (no Discord, WhatsApp or Slack), and the previews have historically lagged behind platform redesigns.
Use it when: you are writing meta tags from scratch and want instant visual feedback while typing.
OpenGraph Check — where we fit
OpenGraph Check fetches your page exactly like a social crawler does — plain HTTP, no JavaScript execution — then validates every Open Graph and Twitter Card tag, downloads the actual og:image to verify it loads and measure its dimensions, and renders previews for six platforms including the chat apps most tools skip: WhatsApp, Discord and Slack. No account, no scan limit for normal use, and the tag report explains what is wrong and how to fix it rather than just flagging a failure.
What we deliberately do not do: refresh platform caches. Nobody outside the platforms can — any tool claiming otherwise is re-scraping its own cache, not Facebook's. The honest workflow is to fix and verify tags here first, then use the official debugger of whichever platform is showing a stale preview.
Which tool for which job
- Before sharing a new page: run it through a multi-platform simulator (ours or another) to catch missing tags and broken images before platforms cache anything.
- Stale preview on Facebook or LinkedIn: fix the tags, verify with a simulator, then force a refresh with that platform's own debugger.
- Writing meta tags from scratch: metatags.io's live editor, or our Open Graph generator.
- Auditing chat-app previews (WhatsApp, Discord, Slack): this is our niche — the official platforms offer no debugger at all, and most third-party tools skip them.
The bottom line, honestly
No single tool covers everything, because the official debuggers own cache-refreshing and the simulators own everything else. The practical setup is one good simulator plus bookmarks to the Facebook and LinkedIn debuggers for cache emergencies. We built OpenGraph Check to be the simulator half of that pair — and for chat-platform previews, currently the only half available.
