Shumway SEO Toolkit

Private, local-first SEO inspection for the current page—no accounts, no tracking.

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Added Jul 2026

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What is Shumway Seo Toolkit?

Shumway SEO Toolkit is a local-first browser extension for page-level SEO inspection that runs entirely in your browser with no accounts, tracking, or background crawling. It provides SEOs, product managers, content teams, and developers with structured workspace access to rendered metadata, indexability signals, Core Web Vitals, CrUX data, PageSpeed Insights diagnostics, headings, links, images, structured data, SERP previews, and accessibility information. All analysis and exports happen locally, with optional remote data fetching only for Google CrUX and PageSpeed Insights when chosen.

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Key Features of Shumway Seo Toolkit

On-page SEO data inspection and exports
Rendered metadata and technical response analysis
Core Web Vitals, CrUX current field data, and CrUX history charts
PageSpeed Insights lab diagnostics
Heading outline and link analysis with rel attributes
Image list with alt text coverage and lazy loading checks
Structured data detection (JSON-LD, Microdata, RDFa)
Robots.txt viewer and URL/path testing
Editable SERP previews for desktop and mobile
Multiple export formats (CSV, TSV, JSON, Markdown, TXT, DOCX, ODT, ZIP)
Accessibility structure analysis
Local Core Web Vitals measurement
No accounts, analytics, or tracking pixels required

Who Should Use Shumway Seo Toolkit?

Audit on-page SEO factors for content teams

Inspect technical SEO response headers and indexability signals

Analyze Core Web Vitals and PageSpeed performance

Review structured data implementation and schema validation

Test robots.txt rules against crawler user-agents

Preview how pages appear in Google search results

Export page data for SEO audits and reporting

Check alt text coverage and image optimization

Validate heading hierarchy and internal link structure

Shumway Seo Toolkit: Pros & Cons

✓Pros

Runs entirely locally in browser with no accounts required
No tracking pixels, analytics, or background crawling
Fast analysis with no server dependencies for most features
Comprehensive page inspection (200+ data points)
Multiple export formats for flexibility
Editable SERP previews to test title/description changes
CrUX and PageSpeed data available on-demand
Crawler selection grouped by type (core, detected, AI, other)
Accessibility structure analysis built-in

Frequently Asked Questions about Shumway Seo Toolkit

Does Shumway SEO Toolkit require an account to use?

No, it requires no accounts, no analytics tracking, and no registration. It works as a standalone browser extension.

Does Shumway collect my data or track my activity?

No, Shumway is local-first with no tracking pixels or background crawling. Most analysis runs locally in your browser.

What data can I export from Shumway?

You can export page data as CSV, TSV, JSON, Markdown, TXT, DOCX, ODT, HTTP trace reports, Web Vitals reports, image ZIP files, accessibility JSON, robots test results, schema JSON, or SERP preview images.

Can Shumway access Google's CrUX and PageSpeed data?

Yes, the Web Vitals workspace can request Google CrUX and PageSpeed Insights data for the current URL and cache responses locally. You control when these requests are made.

What types of structured data does Shumway detect?

Shumway detects JSON-LD, Microdata, and RDFa structured data with local parse status, Google rich-result guidance, and warning/error indicators.