Title: MarkExcell Meta Tags and Structured Data
Author: markwexcell
Published: June 28, 2026
Last modified: June 28, 2026
---
Search plugins
# MarkExcell Meta Tags and Structured Data
By [markwexcell](https://profiles.wordpress.org/markwexcell/)
[Download](https://downloads.wordpress.org/plugin/markexcell-meta-tags-structured-data.zip)
* [Details](https://wordpress.org/plugins/markexcell-meta-tags-structured-data/#description)
* [Reviews](https://wordpress.org/plugins/markexcell-meta-tags-structured-data/#reviews)
* [Installation](https://wordpress.org/plugins/markexcell-meta-tags-structured-data/#installation)
* [Development](https://wordpress.org/plugins/markexcell-meta-tags-structured-data/#developers)
[Support](https://wordpress.org/support/plugin/markexcell-meta-tags-structured-data/)
## Description
**MarkExcell Meta Tags and Structured Data** is a lightweight plugin for WordPress
sites that need precise control over their on-page SEO metadata without installing
a full SEO suite.
Every feature is controlled from a pair of meta boxes that appear directly on the
page or post edit screen, keeping everything in context.
**What it does:**
* Adds a custom **title tag** per page or post, with a fallback to the WordPress
default (post title + site name).
* Adds a custom **meta description**, falling back to the post excerpt, then the
site-wide tagline.
* Outputs **Open Graph tags** (`og:title`, `og:description`, `og:image`, `og:url`,`
og:type`, `og:site_name`) with per-page overrides.
* Outputs **Twitter Card** (`summary_large_image`) tags using the same data.
* Provides a freeform **JSON-LD structured data** field for any page or post, with
JSON validation on save and a clear error message if the JSON is malformed.
* **Auto-generates a `BlogPosting` schema** for posts when no manual JSON-LD is
provided, referencing your site’s `#person` and `#website` entities.
**What it does NOT do:**
* No settings pages, no dashboard widgets, no telemetry.
* No sitemap generation.
* No keyword analysis or content scoring.
* No redirection management.
**Important:** Do not run this plugin alongside a full SEO plugin (Yoast SEO, Rank
Math, All in One SEO, etc.) — you will get duplicate title tags and meta tags in
your ``.
**For developers:**
Three filters let you customise the site-wide defaults without editing the plugin:
* `me_seo_default_description` — override the fallback meta description.
* `me_seo_default_og_image` — set a site-wide default OG image URL.
* `me_seo_post_types` — add additional post types to show the meta boxes on (defaults
to `page` and `post`).
Example:
```
add_filter( 'me_seo_default_description', function() {
return 'Your custom site-wide description here.';
} );
add_filter( 'me_seo_default_og_image', function() {
return 'https://example.com/wp-content/uploads/default-share.png';
} );
// Add meta boxes to a custom post type called 'project'
add_filter( 'me_seo_post_types', function( $types ) {
$types[] = 'project';
return $types;
} );
```
### Usage
#### SEO: Title, Description & Open Graph meta box
**Title tag**
Enter the exact string you want to appear in the browser tab and
search results. Leave blank and WordPress will use its default format: _Post Title–
Site Name_.
Recommended length: 60 characters or fewer.
**Meta description**
The sentence or two that appears beneath your page title in
search results. Leave blank to fall back to the post excerpt; if there is no excerpt,
the site-wide default description is used.
Recommended length: 120–160 characters.
**Open Graph overrides**
These three fields let you set different text and image
for social sharing without changing the SEO fields above — useful when the ideal
tweet wording differs from the ideal title tag.
* `og:title` — leave blank to inherit the title tag value.
* `og:description` — leave blank to inherit the meta description.
* `og:image URL` — paste the full URL of a 1200×630 px image. Leave blank to use
the post’s featured image; if there is no featured image, the site-wide default
OG image is used (set via the `me_seo_default_og_image` filter).
#### Structured Data (JSON-LD) meta box
Paste a raw JSON-LD object into this field. The plugin will:
1. Validate that the JSON is well-formed.
2. Check that a top-level `@context` or `@graph` key is present.
3. Re-encode and store the canonical form on save.
4. Output it as a `