# OG image size: 1200×630, and what each platform documents

Use 1200×630 pixels (1.91:1), saved as JPEG or PNG under 600 KB. That one file meets every minimum size and file-size limit that Facebook, LinkedIn, X, WhatsApp and iMessage publish, and Facebook's and LinkedIn's 1.91:1 ratio. X's large card is 2:1 — 30 pixels shorter.

> Every value below comes from the platform's own documentation, checked on 2026-11-02. "Not documented" means the platform publishes nothing for that column.

| Platform | Recommended | Aspect ratio | Minimum | Max file size | Formats | Crop and small images |
|---|---|---|---|---|---|---|
| Facebook | 1200×630 or larger, for high-resolution displays | 1.91:1 | 600×315 for the large card; 200×200 is the smallest allowed | 8 MB | Not documented | Meta asks for a ratio close to 1.91:1 "to display the full image in Feed without any cropping". Below 600×315 the image is shown much smaller. |
| X (summary_large_image) | Not documented | 2:1 | 300×157 (max 4096×4096) | 5 MB | JPG, PNG, WebP, GIF (first GIF frame only; no SVG) | How X crops other ratios is not documented. 1200×630 is 1.905:1, close to 2:1. |
| X (summary) | Not documented | 1:1 | 144×144 (max 4096×4096) | 5 MB | JPG, PNG, WebP, GIF (first GIF frame only; no SVG) | "The image will be cropped to a square on all platforms." |
| LinkedIn | Not documented | 1.91:1 | 1200×627 | 5 MB | Not documented (the JPG/PNG/GIF list on the same help page is for ads) | Images narrower than 401 pixels show as a small thumbnail. |
| Slack | Not documented | Not documented | Not documented | Not documented | Not documented | Reads Open Graph, Twitter Card and oEmbed tags. No size published. |
| Discord | Not documented | Not documented | Not documented | Not documented | PNG, GIF, JPG, WebP, AVIF | Small image beside the text unless twitter:card is summary_large_image; up to four og:image tags make a gallery. |
| WhatsApp | Not documented | ≤ 4:1 | 300 px wide | 600 KB | Not documented | The <head> with the tags must be within the first 300 KB of the HTML. |
| iMessage | Not documented | Not documented | 900 px wide | 10 MB (icons, images and video together; the page itself: 1 MB) | Not documented | Images under 150 px wide may be ignored or shown as an icon. Apple advises against text in preview images. |
| Telegram | Not documented | Not documented | Not documented | Not documented | Not documented | Telegram publishes no requirements for link-preview images. |
| Pinterest | 1000×1500 for Pins (ad specs) | 2:3 | Not documented | 20 MB (desktop upload, ad specs) | PNG, JPEG (ad specs) | Pins taller than 2:3 may be cut off in feeds. Rich Pins read up to six og:image tags; no size is given for them. |
| Mastodon | Not documented | Not documented | Not documented | 8 MB (from the source code) | JPEG, PNG, GIF, WebP (from the source code) | Each server fetches the page itself and stores the image downscaled to at most 230,400 pixels (640×360). |

## Safe zone: what survives a crop

X documents 2:1 for summary_large_image and a square crop for summary, but not where it cuts. If a platform trims from the centre, a 1200×630 image keeps the middle 1200×600 at 2:1 and the middle 630×630 as a square. Keep the title and logo inside those areas, away from the edges. Apple also advises against text in preview images, because Messages shows them at different sizes on different devices — large type survives that, body-size text does not.

## FAQ

### What is the best OG image size?

1200×630 pixels, a 1.91:1 ratio, as a JPEG or PNG under 600 KB. It meets Facebook's recommendation, LinkedIn's 1200×627 minimum, X's card limits and WhatsApp's 600 KB limit.

### Is 1200×627 or 1200×630 right for LinkedIn?

Both work. LinkedIn's help page gives 1200×627 as the minimum and 1.91:1 as the recommended ratio; 1200×630 is three pixels taller, meets that minimum and is the size Facebook recommends.

### What size is the X (Twitter) card image?

For summary_large_image: a 2:1 ratio, at least 300×157 and at most 4096×4096 pixels, under 5 MB, as JPG, PNG, WebP or GIF (first frame only). For summary: 1:1, at least 144×144, cropped to a square. X's card pages have moved off its developer site; these values are from the archived copies.

### Can I use WebP for og:image?

X and Discord list WebP, and Mastodon's source code accepts it, but Facebook, LinkedIn and WhatsApp document no formats at all. JPEG or PNG is the safe choice for og:image.

### What happens if the og:image is too small?

Facebook shows an image under 600×315 much smaller and does not allow one under 200×200. LinkedIn shows an image narrower than 401 pixels as a small thumbnail. Messages may ignore an image under 150 pixels wide or show it as an icon.

### Why does the old image still show after I changed it?

Platforms cache previews. Facebook caches images by URL, so give the new image a new URL and re-scrape in the Sharing Debugger; LinkedIn's Post Inspector refreshes its preview; Slack and Discord keep a preview for about 30 minutes.

## Sources

- Facebook: [Meta for Developers: Images in link shares](https://developers.facebook.com/docs/sharing/webmasters/images)
- Facebook: [Meta for Developers: Sharing for webmasters](https://developers.facebook.com/docs/sharing/webmasters/)
- X (summary_large_image): [X Developer Platform: Summary card with large image (archived 2026-01-12)](https://web.archive.org/web/20260112050218/https://developer.x.com/en/docs/x-for-websites/cards/overview/summary-card-with-large-image)
- X (summary_large_image): [X Developer Platform: Cards markup (archived 2026-01-16)](https://web.archive.org/web/20260116124848/https://developer.x.com/en/docs/x-for-websites/cards/overview/markup)
- X (summary): [X Developer Platform: Summary card (archived 2025-12-16)](https://web.archive.org/web/20251216122910/https://developer.x.com/en/docs/x-for-websites/cards/overview/summary)
- LinkedIn: [LinkedIn Help: Make your website shareable on LinkedIn](https://www.linkedin.com/help/linkedin/answer/a521928)
- LinkedIn: [LinkedIn Help: Refresh the link preview (Post Inspector)](https://www.linkedin.com/help/linkedin/answer/a6233775)
- Slack: [Slack API: Slackbot and robots](https://api.slack.com/robots)
- Discord: [Discord Developer Docs: Link previews](https://docs.discord.com/developers/link-previews/overview)
- WhatsApp: [Meta for Developers: WhatsApp link previews](https://developers.facebook.com/documentation/business-messaging/whatsapp/link-previews/)
- iMessage: [Apple TN3156: Create rich previews for Messages](https://developer.apple.com/documentation/technotes/tn3156-create-rich-previews-for-messages)
- Pinterest: [Pinterest Help: Ad specs (standard image)](https://help.pinterest.com/en/business/article/pinterest-product-specs)
- Pinterest: [Pinterest Developers: Article Rich Pins](https://developers.pinterest.com/docs/web-features/article-rich-pins/)
- Mastodon: [Mastodon docs: PreviewCard](https://docs.joinmastodon.org/entities/PreviewCard/)
- Mastodon: [Mastodon v4.7.4 source: app/models/preview_card.rb](https://github.com/mastodon/mastodon/blob/v4.7.4/app/models/preview_card.rb)
- Open Graph protocol: [ogp.me](https://ogp.me/)