XypherSEO

XypherSEO is a full SEO plugin for WordPress. It puts a search optimization workspace directly below your post editor, scores the page while you write it, shows you exactly how the result will look in Google and on social platforms, and gives you the site-wide tools most sites end up installing three separate plugins for.

Everything described below is included. There is no account to create, no API key to paste, no usage cap, and no feature that stops working after a trial period. The plugin does not phone home. Every check runs on your own server against your own content.

Score every page while you write it

The editor panel runs 30 individual on-page checks and turns them into a single score out of 100, grouped into four levels so you always know what to fix next.

• Live scoring. The score updates as you type. No save, no reload, no separate analyze button to remember.
• Grouped checklist. Checks are split into Basics, Intermediate, Advanced and Pro, so a new writer sees the handful of things that matter and an experienced one sees all thirty.
• A specific fix for every failed check. Not “improve readability” but the actual change to make on this page.
• Word count and keyword count, shown live, including on pages built with Elementor and other page builders.

The checks cover focus keyword placement in the title, slug, opening paragraph, subheadings and image alt text; title and meta description length against what Google actually displays; keyword density; internal and outbound linking; sentence and paragraph readability; subheading distribution; keyword variations; and whether the page uses a list or table.

See the result before you publish

• Google SERP preview with separate desktop and mobile rendering, updating as you type, showing the favicon, site name, URL, title and description as they will appear.
• Character counters on the SEO title and meta description with the recommended range marked, so you stop guessing where Google truncates.
• Social previews for four platforms: Facebook, X, LinkedIn and Pinterest, each rendered separately.
• Per-platform overrides. Facebook and X titles and descriptions inherit from your SEO fields automatically, and you can override any of them individually. Custom Open Graph image supported, with the featured image used as the fallback.

Structured data you control

• JSON-LD fields for FAQPage, HowTo and Product, plus a free-form field for any other schema type you need.
• Article and BreadcrumbList structured data generated automatically from your content.
• Everything you paste is validated as JSON before it saves, so broken markup never reaches a live page.
• A structured data report showing what is present on the page and what is missing.

Site-wide tools

• XML sitemaps. A sitemap index at /xypher-sitemap.xml with separate sitemaps for posts, pages, custom post types, taxonomies and authors. Styled with an XSL stylesheet so it is readable when opened in a browser rather than a wall of raw XML.
• Redirect manager. 301, 302, 307 and 308 redirects, with regular expression support and a per-rule hit counter so you can see which redirects are actually being used.
• 404 monitor. Logs every missing URL visitors hit, so you can find and redirect the ones that matter instead of guessing.
• Breadcrumbs with BreadcrumbList structured data, output anywhere with the [xypher_breadcrumbs] shortcode.
• Conflict detection. Warns you when another SEO plugin is writing duplicate meta tags or a competing sitemap, rather than letting you silently ship two of everything.
• Canonical and robots controls per page: noindex, nofollow, noarchive, nosnippet and noimageindex.
• Import and export of your settings and redirects as CSV.
• Safe mode. One switch that stops all front-end output while leaving the admin screens working, so you can rule the plugin in or out when diagnosing a theme or caching problem.
• Setup wizard on first activation. Pick which content types show the SEO panel and whether to generate a sitemap.

Free, and staying free

This plugin is complete. Everything above is included for every user with no restrictions, no credits and no expiry.

Two paid plugins with a broader feature set are available separately at xypherseo.com. They are optional. Nothing in this plugin depends on them, prompts you to buy them, or stops working without them.

Privacy

XypherSEO stores its data in your WordPress database and sends nothing anywhere. There is no external service, no telemetry, no tracking and no third-party API. Deleting the plugin removes everything it created.