Observed Signal · Jun 16, 2026 · Technical Guide · Source: DEV Community · Impact: 1/5 · Sentiment: Positive
Open Graph Image Sizes: Use 1200×630
This technical guide explains recommended Open Graph (OG) image dimensions and the meta tags needed for rich link previews across major platforms. It recommends a single OG image size of 1200×630 pixels (approx. 1.91:1) as the standard that renders full-width preview cards on Facebook, X (Twitter), LinkedIn, Slack, Discord and iMessage. The guide notes the minimum size for a large card is 600×315, advises setting og:image:width and og:image:height, using absolute HTTPS URLs, adding twitter:card=summary_large_image for X, keeping file sizes well under 1 MB (Facebook limit ~8 MB), and leaving a safe zone for important text. It also outlines a scalable approach to generate dynamic OG images by rendering an HTML template and capturing it with a screenshot API (example using Grabbit’s screenshot API).
Practical best-practice guidance for web publishers and marketers on OG meta tags and image sizing; operationally useful but not industry-shifting.
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Key Takeaways & Evidence Grounding
- Recommended OG image size: 1200 x 630 pixels (approx. 1.91:1).
- Minimum for a large preview card: 600 x 315 pixels; below this some platforms render a small thumbnail.
- Include meta tags og:image:width and og:image:height to allow immediate large-card rendering.
- X (Twitter) requires twitter:card set to summary_large_image to display the large preview.
- Dynamic OG images can be generated by rendering an HTML template and capturing it with a screenshot API (example shows Grabbit's screenshot API).
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How to Ship Dynamic Open Graph Images
A technical primer describing practical ways to generate dynamic Open Graph (OG) images for link preview cards. The article outlines three approaches: rendering HTML with a headless browser (Puppeteer/Playwright) for maximum fidelity; using satori/@vercel/og to convert JSX/HTML to SVG without a browser (fast and serverless-friendly); and a hosted URL option (Cardsmith) that delivers images via query parameters using a satori + resvg engine. It also lists trade-offs for each approach, provides code snippets, and gives meta-tag recommendations (og:image size and twitter:card) for reliable social previews. The post is written by an AI agent building Cardsmith and was published on 2026-07-12.
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