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SEO Diagnostix
Free Chrome extension for on-page and technical SEO audits
PricingFree
CategoryTechnical SEO
Data checkedManually checked
Launch dateOct 2, 2026
Overview
What is SEO Diagnostix?
SEO Diagnostix is a free Chrome extension for inspecting on-page and technical SEO signals. It helps review canonical URLs, hreflang annotations, links, robots directives and Schema.org structured data, and includes sitemap crawling and SERP checks. The extension is designed for page diagnostics and technical QA from the browser. It is available through the Chrome Web Store.
SEO Diagnostix belongs in the diagnostic part of the SEO workflow. It helps teams move from a large set of URLs and technical signals to a smaller, prioritized set of issues that can be investigated and assigned.
Best forIn-house SEO teams, consultants and agencies responsible for site health.
Primary workflowTechnical auditing and diagnosis
Delivery modelHosted SEO software or managed web application
Pricing modelFree
Product gallery / 01
See SEO Diagnostix in context
Capabilities
What it helps you do
01
Canonical and hreflang checks
Canonical and hreflang checks is one of SEO Diagnostix’s documented core capabilities. Its exact scope can vary by plan, deployment and integration, so validate it against the current product documentation.
02
Robots directives and link inspection
Use robots directives and link inspection to turn site-level data into specific findings that can be reviewed, prioritized and handed to the person responsible for implementation.
03
Schema.org structured data analysis
Schema.org structured data analysis is one of SEO Diagnostix’s documented core capabilities. Its exact scope can vary by plan, deployment and integration, so validate it against the current product documentation.
04
Sitemap crawling and SERP checks
Use sitemap crawling and serp checks during discovery, when the team gathers evidence before deciding which opportunities, queries or competitors deserve deeper work.
Workflow
How SEO Diagnostix fits into the work
01
Canonical and hreflang checks
Canonical and hreflang checks is one of SEO Diagnostix’s documented core capabilities. Its exact scope can vary by plan, deployment and integration, so validate it against the current product documentation.
02
Robots directives and link inspection
Use robots directives and link inspection to turn site-level data into specific findings that can be reviewed, prioritized and handed to the person responsible for implementation.
03
Schema.org structured data analysis
Schema.org structured data analysis is one of SEO Diagnostix’s documented core capabilities. Its exact scope can vary by plan, deployment and integration, so validate it against the current product documentation.
Decision guide
What to know before choosing
A good fit when
- ✓You need support for Technical SEO and Schema in a defined workflow.
- ✓You need a no-cost entry point for the documented core workflow.
- ✓Your stack already includes or can work with Google Chrome.
Verify before adopting
- →Confirm which capabilities are included in the current free offering and whether usage limits apply.
- →Check integrations, export options and how the product fits your existing reporting or publishing process.
- →Validate the depth and scale of sitemap crawling and serp checks for your team.
Verified reviews
What users say about SEO Diagnostix
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Categories
Practical questions
SEO Diagnostix FAQ
What is SEO Diagnostix?+
SEO Diagnostix is a free Chrome extension for inspecting on-page and technical SEO signals. It helps review canonical URLs, hreflang annotations, links, robots directives and Schema.org structured data, and includes sitemap crawling and SERP checks. The extension is designed for page diagnostics and technical QA from the browser. It is available through the Chrome Web Store.
Who is SEO Diagnostix best for?+
In-house SEO teams, consultants and agencies responsible for site health.
How is SEO Diagnostix priced?+
The listed pricing model for SEO Diagnostix is free. Confirm current terms and any usage limits on the official website before choosing.
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