Twitter Card Meta Tags: The Last Guide You'll Ever Need
Summary cards, large image cards, and how to validate them. Everything you need in one page.
Twitter (X) renders links as cards when you use the right meta tags. Without them, your link is just a URL. With them, it's a banner that takes up half the timeline. Here's how to set them up correctly.
The two card types that matter
**Summary card** — small square thumbnail on the left, title and description on the right. Best for content where the image is incidental.
**Summary card with large image** — full-width image on top, title and description below. Best for content where the image carries weight (most marketing).
For 95% of marketing pages, use `summary_large_image`. It claims more screen real estate and gets more engagement.
The required tags
`twitter:card` — set to "summary" or "summary_large_image"
`twitter:title` — up to 70 characters
`twitter:description` — up to 200 characters
`twitter:image` — at least 300x157 for summary, 1200x628 for large image
If you also have og:title, og:description, and og:image, Twitter will fall back to those. You only need twitter:* tags if you want different copy for Twitter than for other platforms.
When to write Twitter-specific copy
Twitter rewards a different voice than LinkedIn or Facebook. Punchier, more contrarian, more personality. If your audience is heavily on Twitter (developer tools, indie hackers, crypto, media) it's worth writing dedicated twitter:title and twitter:description. For most B2B SaaS, the og: copy works fine.
Image dimensions
For `summary_large_image`, use 1200x628 (or 1200x675 for safety). The image should be under 5MB. JPEG and PNG both work. Avoid GIFs — they render as static images. WebP is supported on most modern clients.
Common errors
The most common mistake: setting twitter:card but forgetting the rest. Twitter then uses og: tags for everything, which usually works but sometimes doesn't. Always set the full set if you set any.
The second most common: image URLs that require authentication or are blocked by your CDN to non-browser user agents. Twitter's bot needs to fetch the image. Test before you share.
Validation
Twitter shut down the public Card Validator in 2023 but you can still test by drafting a tweet with your URL. The card preview shows up below the compose box. If it doesn't, something's wrong.
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