Missing OG tags in server-rendered HTML

Notion’s crawler does not execute JavaScript. If your OG tags are injected client-side by React, Vue, or similar, they’re invisible to the crawler.

Diagnosis checklist

1. Check server-side rendering – curl your URL and verify meta tags are in the HTML, not JavaScript-injected.
2. Check for og:title – search the page source. If missing, add it.
3. Check HTTP status – must return 200 OK.
4. Check authentication – pages behind login walls won’t generate previews.
5. Check that the crawler isn’t blocked – requests with “Notion” in the user agent should be allowed.
6. Try re-creating the bookmark – delete and re-paste to force a fresh fetch.

SPA fix

If your site is a SPA, your options:

• SSR – render full HTML on the server
• Pre-rendering – serve static HTML to crawlers
• Static meta tags – add essential tags to the HTML template before JavaScript runs

Testing your fix

curl -A "Notion" https://yoursite.com/page | grep -i "og:title"

Tag visible? Delete the Notion bookmark and re-create it.