inference-sh-3/og-image-design

Install the belt CLI skill: npx skills add belt-sh/cli

OG Image Design

Create social sharing images (Open Graph) via inference.sh CLI.

Quick Start

Requires inference.sh CLI (belt). Install instructions

belt login

# Generate an OG image with HTML-to-image
belt app run infsh/html-to-image --input '{
  "html": "<div style=\"width:1200px;height:630px;background:linear-gradient(135deg,#1a1a2e,#16213e);display:flex;align-items:center;padding:60px;font-family:system-ui;color:white\"><div><h1 style=\"font-size:56px;margin:0;line-height:1.2\">How We Reduced Build Times by 80%</h1><p style=\"font-size:24px;opacity:0.8;margin-top:20px\">engineering.yourcompany.com</p></div></div>"
}'

Platform Specifications

| Platform | Dimensions | Aspect Ratio | File Size | Format | |----------|-----------|--------------|-----------|--------| | Facebook | 1200 x 630 px | 1.91:1 | < 8 MB | JPG, PNG | | Twitter/X (summary_large_image) | 1200 x 628 px | 1.91:1 | < 5 MB | JPG, PNG, WEBP, GIF | | Twitter/X (summary) | 800 x 418 px | 1.91:1 | < 5 MB | JPG, PNG | | LinkedIn | 1200 x 627 px | 1.91:1 | < 5 MB | JPG, PNG | | Discord | 1200 x 630 px | 1.91:1 | < 8 MB | JPG, PNG | | Slack | 1200 x 630 px | 1.91:1 | — | JPG, PNG | | iMessage | 1200 x 630 px | 1.91:1 | — | JPG, PNG |

Universal safe bet: 1200 x 630 px, PNG or JPG, under 5 MB.

The Golden Layout

┌──────────────────────────────────────────────────┐
│                                                  │
│  ┌─────────────────────────────────┐  ┌───────┐  │
│  │                                 │  │       │  │
│  │  Title Text (max 60 chars)      │  │ Logo/ │  │
│  │  ───────────────────            │  │ Visual│  │
│  │  Subtitle (max 100 chars)       │  │       │  │
│  │                                 │  │       │  │
│  │  author / site name             │  └───────┘  │
│  └─────────────────────────────────┘             │
│                                                  │
└──────────────────────────────────────────────────┘
  1200 x 630 px

Design Rules

Text

| Rule | Value | |------|-------| | Title font size | 48-64px | | Subtitle font size | 20-28px | | Max title length | 60 characters (gets truncated on some platforms) | | Max subtitle length | 100 characters | | Line height | 1.2-1.3 for titles | | Font weight | Bold/Black for title, Regular for subtitle | | Text contrast | WCAG AA minimum (4.5:1 ratio) |

Safe Zones

┌──────────────────────────────────────────────────┐
│  ┌──────────────────────────────────────────────┐│
│  │ 40px padding from all edges                  ││
│  │                                              ││
│  │  Content lives here                          ││
│  │                                              ││
│  │                                              ││
│  └──────────────────────────────────────────────┘│
└──────────────────────────────────────────────────┘

• 40px minimum padding from all edges
• Some platforms crop edges or add rounded corners
• Never put critical text in the outer 5%

Colors

| Background Type | When to Use | |----------------|-------------| | Solid brand color | Consistent series, corporate | | Gradient | Modern, eye-catching | | Photo with overlay | Blog posts, editorial | | Dark background | Better contrast, stands out in feeds |

Dark backgrounds outperform light in social feeds — most feeds have white/light backgrounds, so dark OG images pop.

Templates by Content Type

Blog Post

belt app run infsh/html-to-image --input '{
  "html": "<div style=\"width:1200px;height:630px;background:linear-gradient(135deg,#667eea,#764ba2);display:flex;align-items:center;padding:60px;font-family:system-ui,sans-serif;color:white\"><div style=\"flex:1\"><p style=\"font-size:18px;text-transform:uppercase;letter-spacing:2px;opacity:0.8;margin:0\">Engineering Blog</p><h1 style=\"font-size:52px;margin:16px 0 0;line-height:1.2;font-weight:800\">How We Reduced Build Times by 80%</h1><p style=\"font-size:22px;opacity:0.9;margin-top:16px\">A deep dive into our CI/CD optimization</p></div></div>"
}'

Product/Launch Announcement

belt app run infsh/html-to-image --input '{
  "html": "<div style=\"width:1200px;height:630px;background:#0f0f0f;display:flex;align-items:center;justify-content:center;font-family:system-ui;color:white;text-align:center\"><div><p style=\"font-size:20px;color:#22c55e;text-transform:uppercase;letter-spacing:3px\">Now Available</p><h1 style=\"font-size:64px;margin:12px 0;font-weight:900\">DataFlow 2.0</h1><p style=\"font-size:24px;opacity:0.7\">Automated reports. Zero configuration.</p></div></div>"
}'

Tutorial/How-To

belt app run infsh/html-to-image --input '{
  "html": "<div style=\"width:1200px;height:630px;background:linear-gradient(to right,#1a1a2e,#16213e);display:flex;align-items:center;padding:60px;font-family:system-ui;color:white\"><div><div style=\"display:inline-block;background:#e74c3c;color:white;padding:8px 16px;border-radius:4px;font-size:16px;font-weight:bold;margin-bottom:16px\">TUTORIAL</div><h1 style=\"font-size:48px;margin:0;line-height:1.2\">Build a REST API in 10 Minutes with Node.js</h1><p style=\"font-size:20px;opacity:0.7;margin-top:16px\">Step-by-step guide with code examples</p></div></div>"
}'

AI-Generated Visual OG

# When you want a striking visual instead of text-based
belt app run falai/flux-dev-lora --input '{
  "prompt": "clean professional social sharing card, dark gradient background, abstract geometric shapes, modern tech aesthetic, minimal, no text, 1200x630 equivalent aspect ratio",
  "width": 1200,
  "height": 630
}'

OG Meta Tags Reference

<!-- Essential (Facebook, LinkedIn, Discord, Slack) -->
<meta property="og:title" content="Title here (60 chars max)" />
<meta property="og:description" content="Description (155 chars max)" />
<meta property="og:image" content="https://yoursite.com/og-image.png" />
<meta property="og:url" content="https://yoursite.com/page" />
<meta property="og:type" content="article" />

<!-- Twitter/X specific -->
<meta name="twitter:card" content="summary_large_image" />
<meta name="twitter:title" content="Title here" />
<meta name="twitter:description" content="Description" />
<meta name="twitter:image" content="https://yoursite.com/og-image.png" />

<!-- Image dimensions (optional but recommended) -->
<meta property="og:image:width" content="1200" />
<meta property="og:image:height" content="630" />

Twitter Card Types

| Card Type | Image Size | Use When | |-----------|-----------|----------| | summary | 800 x 418 (small thumbnail) | Short updates, links | | summary_large_image | 1200 x 628 (full width) | Blog posts, articles, announcements |

Always use summary_large_image unless you have a specific reason not to — the large image gets significantly more clicks.

Consistency System

For a blog or site with many pages, create a template system:

| Element | Keep Consistent | Vary | |---------|----------------|------| | Background style | Same gradient or brand colors | — | | Font family | Same font | — | | Layout | Same positioning | — | | Logo/branding | Same placement (corner) | — | | Category badge | Same style | Color per category | | Title text | Same size/weight | Content changes |

Testing OG Images

| Tool | URL | |------|-----| | Facebook Debugger | developers.facebook.com/tools/debug/ | | Twitter Card Validator | cards-dev.twitter.com/validator | | LinkedIn Post Inspector | linkedin.com/post-inspector/ | | OpenGraph.xyz | opengraph.xyz |

# Research OG debugging tools
belt app run tavily/search-assistant --input '{
  "query": "open graph image debugger preview tool test og:image"
}'

Common Mistakes

| Mistake | Problem | Fix | |---------|---------|-----| | No OG image at all | Platform shows random page element or nothing | Always set og:image | | Text too small | Unreadable on mobile previews | Title minimum 48px at 1200px width | | Light background | Gets lost in white/light feeds | Use dark or saturated backgrounds | | Too much text | Cluttered, overwhelming | Max: title + subtitle + brand | | Image too large (>5MB) | Some platforms won't load it | Optimize to under 1MB ideally | | No safe zone padding | Text cropped on some platforms | 40px padding from all edges | | Different image per platform | Inconsistent sharing experience | Use 1200x630 for everything | | HTTP image URL | Many platforms require HTTPS | Always serve OG images over HTTPS | | Relative image path | Won't resolve when shared | Use full absolute URL |

Related Skills

npx skills add inference-sh/skills@ai-image-generation
npx skills add inference-sh/skills@landing-page-design
npx skills add inference-sh/skills@prompt-engineering

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