Shumway SEO Toolkit by Brian Shumway

Fast, private on-page SEO data, exports, schema, links, images, and SERP previews for working SEOs.

Shumway SEO Toolkit inspects the current browser tab and shows page-level signals in one workspace. Open it when you need it. There is no account, and analysis never leaves your machine.

FEATURES

🔍 Overview
See how the page identifies itself: URL and canonical, title and description, language, H1, robots meta, response headers, and a short list of review items.

📈 Web Vitals
Measure this page in your browser, then optionally refresh CRUX Report field data and PageSpeed Insights lab data. Responses stay on your device until you refresh again.

📋 Headings and Links
Walk the rendered heading outline and the link list, including empty or duplicate anchors. Filter, sort, copy, or save the rows you care about.

🖼 Images
Review rendered images, alt text, missing dimensions, and duplicate sources. Preview files, copy URLs, and save a ZIP of selected images.

🗂 Structured Data
Find JSON-LD, Microdata, and RDFa on the page, inspect parse warnings, and copy a block as pretty JSON.

🤖 Robots Tools
View the live robots.txt file, test a path against grouped crawlers or a custom user-agent, and see which rules matched.

✏ SERP Previews
Edit desktop and mobile search-result previews and save a PNG or WebP of the layout you want.

♿ Accessibility and Color
Inspect the rendered accessibility tree, including landmarks and controls. An optional colorblind-friendlier palette makes issue marks easier to tell apart.

🎨 Social and Style
Preview Open Graph and X/Twitter tags, then inspect fonts, CSS variables, page colors, and stylesheets.

🛠 Webmaster Tools
Open shortcuts for the current URL or site. Those sites load only when you click them.

📦 Exports
Save tables, page copy, image archives, and preview images in the browser. Nothing is uploaded to Shumway for those files.

PRIVACY 🔒
The extension reads the active tab only after you use it. It does not send page content to Shumway servers or record analytics about your browsing.