For/Slack
OG image for Slack
Generate a clean preview image, add correct meta tags, and validate it like a bot. No accounts. No tracking.
Recommended size
Use a single universal OG image if you can. It keeps your implementation simple and avoids edge-case breakage.
| Platform | Slack |
| Recommended | 1200x630 |
| Best default | PNG (text) or JPG (photo) |
Meta tags (safe default)
These tags work across platforms. Use an absolute HTTPS image URL.
<meta property="og:title" content="Your title" />
<meta property="og:description" content="Your description" />
<meta property="og:image" content="https://example.com/og.png" />
<meta property="og:image:width" content="1200" />
<meta property="og:image:height" content="630" />Need a complete copy-paste block (including Twitter tags)? Use Meta Tag Generator.
Validate and refresh caches
- Validate a URL to confirm tags on the live page.
- Use the debug checklist if previews are broken.
- Platform debugger: not available. Test by sharing in a private channel and waiting for caches.
Related guides
- Size guide: /sizes/slack-unfurl
- Universal sizing: OG image size guide
Generate an OG image for Slack
Create a universal 1200x630 image, then validate the unfurl on a real URL.