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Which Open Graph tags does a React page need?
The Open Graph Protocol identifies four required properties: og:title, og:type, og:image and og:url. Use values that describe the specific page. The og:url value should be the page’s canonical URL, which the protocol treats as the object’s permanent identifier. Open Graph Protocol
og:title: the page title to show in a share preview.og:type: the kind of object, such aswebsite.og:url: the page’s canonical, absolute URL.og:image: an absolute URL to the preview image.
og:description is optional but generally recommended. The protocol also says that if a page specifies og:image, it should specify og:image:alt, a text description of the image. Optional image properties can specify a secure URL, MIME type, pixel width and height. The protocol does not establish current image dimensions, file-size limits or format recommendations for every social platform, so check the target platform’s documentation for those specifics. Open Graph Protocol
Add tags to a React component
React documents a built-in <meta> component that can be rendered from any component and placed in the document head. For a static page, or a route whose metadata is rendered into its initial HTML, a small component can hold the tags:
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function SocialMetadata() {
return (
<>
<meta property="og:title" content="Example page title" />
<meta property="og:type" content="website" />
<meta property="og:url" content="https://example.com/page" />
<meta property="og:image" content="https://example.com/images/page-preview.jpg" />
<meta property="og:description" content="A concise description of this page." />
<meta property="og:image:alt" content="Description of the preview image" />
</>
);
}Render this component as part of the page or route whose metadata it describes. React’s documented behavior is useful, but verify the production HTML response for the exact URL; seeing a tag after the app runs in a browser is not by itself proof that a social preview consumer will receive it. React’s <meta> reference
Keep titles, descriptions and URLs specific to the page. Use absolute URLs for og:url and og:image. Avoid duplicate tags: the protocol permits repeated values and gives the first value preference when values conflict, so a generic tag in the shell can take precedence over a route-specific tag. Open Graph Protocol
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Make route-specific metadata available in the HTML response
For a client-rendered React app, the important distinction is between the DOM after JavaScript runs and the HTML the server returns for a route. If every URL initially receives the same generic HTML shell, changing metadata after React starts may not provide page-specific values to a preview consumer. The safe implementation depends on how the app is deployed:
| Approach | Use it when | Trade-off |
|---|---|---|
| Static tags in the HTML template | One set of site-wide tags is sufficient, or the site is a single page. | Simple, but does not provide unique route metadata on its own. |
| React meta components | Your React version and rendering setup put route metadata in the response HTML. | Composable; confirm the deployed route response contains the intended values. |
| Server rendering or framework metadata facilities | Routes need distinct values and the stack supports server rendering. | Can provide route values in the initial response; the setup varies by framework. |
| Static HTML generated per route | The pages can be generated at build time. | Provides per-route HTML without runtime rendering, but requires build and deployment support. |
| Server-side placeholder replacement | A custom server returns an HTML shell and can look up metadata by route. | Adapts a client-rendered app, but requires correct lookup and context-appropriate escaping. |
For an existing client-rendered app, Create React App’s guide describes two concrete patterns: replace placeholders in the HTML on the server, or pre-build a separate static HTML file for each page. That guide is specific to Create React App, which its documentation marks deprecated; treat it as an example of these techniques, not as the default recommendation for a new React project. Create React App: Title and Meta Tags
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Server-side placeholder replacement
A template can mark the attributes the server will fill from route data:
<meta property="og:title" content="__OG_TITLE__" />
<meta property="og:description" content="__OG_DESCRIPTION__" />
<meta property="og:url" content="__OG_URL__" />
<meta property="og:image" content="__OG_IMAGE__" />When a request arrives, look up metadata for its route, then replace the placeholders before sending the HTML. Escape inserted values for their HTML attribute context; do not concatenate untrusted route data directly into the template. Create React App’s guide explicitly warns to sanitize and escape values. Create React App: Title and Meta Tags
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React server rendering
If you use a server-rendered React setup, render the route and its metadata as part of the response. React’s renderToStaticMarkup API can produce an HTML string for a server response, but that output cannot be hydrated. React documents renderToString with hydrateRoot for interactive apps; do not treat renderToStaticMarkup as an automatic replacement for your framework’s rendering pipeline. React: renderToStaticMarkup
Verify the preview metadata for each route
- Request the exact public page URL and inspect the returned HTML source or HTTP response—not only the live DOM after the app has run.
- Confirm the response includes the four required tags and that each value describes that route.
- Check that
og:urlis the intended canonical URL and thatog:imageis a publicly reachable, absolute image URL. - Check the optional description and image alt text, and confirm any dynamically inserted attribute values are escaped.
- Repeat the check on at least two routes if each should have a different preview. Look for stale generic tags or duplicates.
- Use the target social platform’s current preview or debugging tool to check its interpretation and refresh a cached preview if needed. The Open Graph Protocol lists Facebook’s Object Debugger as an implementation tool; platform tools and caching behavior may change. Open Graph Protocol
Troubleshoot incorrect or missing previews
- The browser shows the right tags, but the preview does not: inspect the route’s original HTTP response. If the values appear only after client-side JavaScript runs, use server rendering, static HTML per route or server-side replacement so they are present in the returned HTML.
- Every route shares the same title or image: check whether the server serves one generic shell or a generic tag appears before a route-specific tag. Generate or substitute metadata per route and remove conflicting duplicates.
- The preview has the wrong canonical URL: compare
og:urlin the response with the intended canonical address. Update the route’s metadata source if it points to the shell URL or another page. - The image is absent: confirm the
og:imagevalue is an absolute URL and publicly reachable. The protocol defines the field as an image URL; any additional platform-specific image requirements need to be checked with that platform. - Inserted metadata breaks the markup: escape dynamic values for their HTML attribute context before substitution. Sanitizing alone does not replace context-appropriate escaping.
- A preview remains stale after a change: check the target platform’s current debugger or preview tool and refresh its cached interpretation if the tool supports it.
Or skip the browser setup
If you also need a screenshot of a page or a captured PDF while checking a rendered route, ScreenshotNeo is a website screenshot API and MCP server. It is separate from setting Open Graph tags: use the response HTML checks above to verify metadata. A single GET request can capture a URL as PNG, JPEG, WebP or PDF. See the ScreenshotNeo API documentation.
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Frequently Asked Questions
What does og:type mean?
It identifies the kind of object described by the page’s Open Graph metadata; website is an example value.
Can React render a <meta> element from a component?
Yes. React documents that its built-in <meta> component can be rendered from a component and placed in the document head.
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