説明
Hydrogen SEO is a lightweight, AI-powered SEO plugin for WordPress. It writes your meta titles and descriptions, generates schema markup, fills in image alt text, and audits your site for the on-page issues that hold rankings back — all from a fast, modern dashboard and directly inside the block editor.
It is built for how search works now: not just Google, but AI answer engines like ChatGPT and Perplexity that read your pages and cite them in answers.
AI writing tools
- AI meta titles and meta descriptions — click the AI button next to any field, get several suggestions, pick the one you like, and it fills the field
- AI social titles and descriptions for Facebook / Open Graph and X (Twitter)
- AI image alt text for single images or in bulk across your media library
- AI content generation and rewriting for SEO
- AI featured image generation
- AI-assisted schema (structured data) for your business details
On-page SEO essentials
- Titles and meta descriptions with template variables for posts, pages, custom post types, taxonomies and archives
- Schema markup (JSON-LD): Article, Product, FAQ, HowTo, Recipe, Course, Event, Local Business, Breadcrumbs and more
- XML sitemaps
- Robots meta controls per post, plus a built-in robots.txt editor
- Open Graph and X (Twitter) card previews so you can see the share card before you publish
- Google search result (SERP) preview as you type
- Redirection manager with 301/302 support
- Homepage SEO settings
- Canonical URLs
Built for AI search (AEO)
- llms.txt editor — publish crawl and usage guidance for large language models, the emerging standard for AI answer engines
- Clean, structured output so answer engines can quote your pages accurately
Site health checks
The dashboard runs an on-page audit and scores your site across crawlability and indexing, performance and speed, mobile optimisation, security and more, with a clear list of what to fix first.
Fast and clean
- Modern React dashboard, no jQuery bloat
- Heavy assets load on demand, so wp-admin stays quick
- No front-end JavaScript added for SEO output
- REST API for every feature
Free account for AI features
The AI features are powered by the Hydrogen SEO API. Create a free account at hydrogenseo.com, connect it from the plugin in one click, and you get free AI credits to start with. All non-AI SEO features (titles, meta, schema, sitemaps, robots, redirections, previews) work without an account.
External services
This plugin relies on the following third-party/external service. It is described below so you know what data is sent, when, and under which conditions.
Hydrogen SEO API
The plugin connects to the Hydrogen SEO API (hydrogenseo.com) to power its AI features: content generation, metadata (SEO title/description) generation, image alt-text generation, AI image generation (for featured images), and business/local schema generation.
Data is sent only when you actively use an AI feature. Depending on the feature, the request includes the text or image you ask it to work with (for example a topic, the content to improve, an image URL for alt-text, a prompt for image generation, or your business details for schema) and your configured API key. When you connect your account, your site URL and the name and email you choose to provide are sent so that an API key can be issued. In the setup wizard you may optionally enter your name and email; if you do and you tick the consent checkbox, they are sent with your site URL so we can send you setup help and product updates. Both fields are optional, the wizard can be skipped, and nothing is sent if you leave them blank or do not consent. The plugin does not send this data in the background or without a user action.
This service is provided by Hydrogen SEO. Terms of service: https://hydrogenseo.com/terms — Privacy policy: https://hydrogenseo.com/privacy
インストール
- In your WordPress admin, go to Plugins Add New and search for “Hydrogen SEO”, or upload the
hydrogen-seofolder to/wp-content/plugins/ - Activate the plugin through the Plugins menu
- Follow the short setup wizard
- To turn on the AI features, open Hydrogen SEO API Key and connect your free hydrogenseo.com account
FAQ
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Do I need an account to use the plugin?
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No. Titles and meta descriptions, schema markup, XML sitemaps, robots.txt, redirections, social previews and the site health checks all work out of the box. Only the AI features (AI meta descriptions, alt text, content and images) need a free API key from hydrogenseo.com.
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How do the AI suggestions work in the editor?
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Open the Hydrogen SEO panel while editing a post or page. Next to the SEO title, meta description and the social fields there is a small AI button. Click it and you get several suggestions with character counts. Choose one and it fills the field — you can still edit it afterwards, and nothing is published until you save.
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What is llms.txt and why does it matter?
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llms.txt is a file at the root of your site that tells AI systems how your content may be crawled and used, similar to what robots.txt does for search engines. Hydrogen SEO includes an editor for it so you can be visible and correctly quoted in AI answers.
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Is Hydrogen SEO compatible with other SEO plugins?
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It works alongside other plugins, but running two SEO plugins that both output titles, meta tags or schema can produce duplicate output. For best results use Hydrogen SEO as your primary SEO plugin.
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Will this slow my site down?
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No. The plugin adds no front-end JavaScript for its SEO output, and the admin dashboard loads its heavy assets only when needed.
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What are the requirements?
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WordPress 6.7 or higher, PHP 7.4 or higher, and a modern browser with JavaScript enabled in the admin.
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Where is my data sent?
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Only to the Hydrogen SEO API, and only when you actively use an AI feature. See the “External services” section below for the exact details.
評価
このプラグインにはレビューがありません。
貢献者と開発者
Hydrogen SEO (Beta) – AI SEO, Meta Tags, Schema & Sitemap はオープンソースソフトウェアです。以下の人々がこのプラグインに貢献しています。
貢献者
変更履歴
0.0.11
- Onboarding improvements
- Clearer consent wording and a working privacy policy link in the setup wizard
0.0.10
- AI suggestions in the editor: the SEO title, meta description and social fields now have an AI button that offers several options with character counts — choose one and it fills the field
- Fixed AI features that generated results but never applied or displayed them
- Fixed AI requests timing out before the generation finished
- Fixed AI featured image generation and setting a generated image as the featured image
- Removed the AI Content Assistant panel in favour of the per-field AI buttons
- Removed placeholder sample data from the dashboard so every number shown is your site’s own
- Long generated text no longer overflows its input; added loading, empty and error states across the dashboard and the editor panel
- Errors that previously failed silently (saving SEO settings, loading schema fields, content analysis) are now reported in the interface
- Internal link suggestions are now provided by the separate Hydrogen SEO Pro add-on
- Various layout, spacing and consistency fixes
0.0.9
- Completely redesigned setup wizard with a new immersive look and a smoother step-by-step flow
- Streamlined the WordPress admin menu — full navigation now lives inside the plugin dashboard’s own sidebar
- Faster admin dashboard: heavy visual assets are now loaded on demand instead of up front
- Fixed setup wizard layout issues: unnecessary scrolling, button placement, and focus states
- Various UI polish and stability improvements across the dashboard and block editor
0.0.8
- New Hydrogen SEO “Balloon” brand mark across the admin menu, dashboard, block editor, and WordPress.org listing (banner and icon)
- Refreshed loading and onboarding animations to use the animated logo
0.0.7
- Rebranded the plugin to Hydrogen SEO
0.0.6
- Output JSON-LD schema markup with WordPress default escaping for safe script-context rendering
- Registered plugin settings with a statically verifiable prefixed option name
0.0.3
- Removed sitemap search-engine pinging and the XSL stylesheet
- Documented external services in the readme
- Sanitized stored schema data and escaped JSON-LD output for script context
- Fixed General Settings not saving
0.0.1
- Initial release
- AI-powered content analysis
- Content optimization features
- Modern React-based dashboard
- REST API integration