Chrome Extension
SEO audit any website. Instantly.
Seonio turns Chrome into an SEO audit tool. One click scans whatever page you're on a gives you a full on-page audit in seconds.
100% local, your data never leaves the browser
Any open tab, no copy-pasting URLs
Actionable SEO recommendations
Export pages as clean Markdown or HTML
Free, no sign-up.
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100% local
Page data never leaves your browser. No servers, no telemetry, no account.
Fast
Open the side panel, click scan, get results in under two seconds.
Actionable
Every issue comes with a one-line fix and the exact line of HTML that caused it.
Free
No paywall, no upsell, no “pro” tier hiding the good stuff.
What it looks like
A clean side panel that gets out of your way.
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Overview
Score, severity breakdown, six categories at a glance.
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Assets finder
Every image, font and script on the page — copy, download, preview.
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SERP & social previews
See how Google, Twitter and Open Graph will render the page.
Six categories. One audit.
Everything Seonio inspects on a page. Whether you paste a URL above or scan a tab from the extension. Grouped so the most important fixes surface first.
Indexability
Will Google index this page?
Robots directives, canonical tags, HTTPS and hreflang. The signals search engines check first.
Robots
Canonical
Metadata & SERP
How the page appears in search
Title, meta description, language, URL quality and favicon, with a live Google SERP preview.
Title & Meta
SERP Preview
Content structure
Headings, hierarchy & top terms
H1–H6 hierarchy, duplicate or missing H1s, thin-content warnings and the page’s top terms.
Heading outline
Top terms
Links & images
Internal links & image alt text
Internal vs external links, anchor quality, broken anchors and missing image alt text.
Anchors
Image alt
Schema & social
Structured data & share previews
Open Graph, Twitter Cards and JSON-LD schema, with social card previews side-by-side.
Social cards
Schema
Technical signals
Doctype, charset, viewport, DOM
The foundational signals that make a page render and crawl correctly across devices.
Page basics
DOM size
How it works
Three clicks from install to insight.
Install
Add Seonio from the Chrome Web Store in one click. No account, no setup.
Open the side panel
Open any page, public or private, and click the Seonio icon.
Scan
A scored, grouped audit with HTML evidence and a one-line fix per issue.
Private by design
The minimum permissions. None of the surveillance.
Built on Manifest V3
Every scan runs in your browser. No external APIs, no telemetry, no backend. The extension only sees the tab you actively scan, and only when you click the button.
Zero network calls during a scan, verifiable in DevTools
No tracking, no analytics
No account required
Permissions
activeTab
Read the page you’re currently viewing
scripting
Inject the data collector into the active tab
sidePanel
Render the audit UI in Chrome’s side panel
tabs
Detect the URL of the active tab
storage
Remember your last scan locally
Audit any page in seconds.
Add the extension for one-click audits on every tab: public, private, staging or localhost. Or paste a public URL above for a quick check.
Free, no sign-up.