Generate Automatic Open Graph Images for your Jekyll Site

Use a shared Jekyll layout to give every generated page and post an HCTI social card with the matching path.

Before you begin

Create an OG Image Config for your deployed site’s exact HTTPS origin, then copy its domain ID.

Use Page Screenshot to capture the rendered Jekyll page or a dedicated card element.
Use Template Values to render front matter inside an HCTI template.

Add a reusable head include

Create _includes/hcti-og-image.html with this Liquid:

{% assign hcti_path = page.url | relative_url %}
{% assign hcti_og_image = 'https://hcti.io/v1/og/YOUR_DOMAIN_ID' | append: hcti_path %}

<meta property="og:image" content="{{ hcti_og_image }}">
<meta property="og:image:secure_url" content="{{ hcti_og_image }}">
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:image" content="{{ hcti_og_image }}">

Replace YOUR_DOMAIN_ID. The relative_url filter preserves a configured baseurl, so a deployed page at /docs/start/ maps to the same source path.

Include it inside the <head> of the layout used by your pages and posts:

<head>
  {% include hcti-og-image.html %}
  <!-- the rest of your head -->
</head>

If jekyll-seo-tag, a theme, or another plugin already emits og:image or twitter:image, configure or change that output instead of leaving duplicate image tags.

Use front matter for per-page controls

Add optional fields to a page or post:

---
title: A practical guide to social cards
description: Build a unique social preview for every Jekyll page.
og_selector: "#social-card"
og_content_version: 4
accent: "#0f766e"
---

Then extend the include.

Page Screenshot mode

{% if page.og_selector %}
  <meta property="hcti:selector" content="{{ page.og_selector | escape }}">
{% endif %}
{% if page.og_content_version %}
  <meta property="hcti:content_version" content="{{ page.og_content_version }}">
{% endif %}

Template Values mode

{% if page.title %}
  <meta property="html:tv:headline" content="{{ page.title | escape }}">
{% endif %}
{% if page.description %}
  <meta property="html:tv:summary" content="{{ page.description | escape }}">
{% endif %}
{% if page.accent %}
  <meta property="html:tv:accent" content="{{ page.accent | escape }}">
{% endif %}

The variable names after html:tv: must match your HCTI template. You can also map the title tag, description, og:title, or og:description in the dashboard instead of adding explicit tags.

Build and verify

Build the site, then inspect a generated HTML file in _site and a deployed page with View Source. Confirm that:

The HCTI URL contains the same path as the deployed page, including baseurl when used.
Liquid placeholders have been replaced with real values.
Only the intended social-image tags remain.

Test the deployed URL in the Social Card Previewer.

See Jekyll’s documentation for front matter, includes, and layouts.

Back to OG Image Configs