SEO Checklist — Free On-Page SEO Checker Chrome Extension

Q: How do I install the SEO Checklist extension?

Open the Chrome Web Store listing and click Add to Chrome. For development, enable Developer mode at chrome://extensions and load the extension folder using Load unpacked.

A free, privacy-friendly SEO checker extension for Chrome. Run an instant on-page SEO audit of any website — checklist scoring, social preview analysis, broken-link visibility, image optimization insights and printable PDF reports. v1.4

File created: 2 Aug 2025 • Last modified: 12 Aug 2026

Install from Chrome Web Store Explore Website Framework Detector View on GitHub Ask a Question

SEO Checklist Chrome extension UI showing on-page SEO audit panel

What's New in v1.4 (March 2026)

More Exact SEO Score

Web-vitals-inspired scoring signals add heading order, discernible link names, and image dimension checks for a more granular audit.

Printable PDF Report

Export your full analysis to a printable report and save it as a PDF directly from the popup.

Heading Order & Image Optimization

Detects skipped heading levels and flags oversized images with size-based optimization recommendations.

Key Features

One-Click SEO Analysis

Analyze the active tab instantly with a clear SEO score and checklist-based feedback summary.

Core On-Page Checks

Reviews title, meta description, heading structure, content depth, canonical, viewport, and schema presence.

Image & Link Quality

Tracks image alt coverage, internal and external links, and broken internal-link status.

Social Metadata Preview

Preview social title, description, image, and URL metadata before publishing updates.

Analytics Detection

Detects Google Analytics or Google Tag Manager implementation as part of technical checks.

External SEO Test Tools

Open Rich Results, PageSpeed, Facebook Debugger, and LinkedIn Inspector with the current URL pre-filled.

Heading Order Validation

Flags skipped heading levels (like H2 straight to H4) that break document structure and accessibility.

Printable Report Export

Open a dedicated printable report view and save your full SEO analysis as a PDF.

Requested Permissions

activeTabRead the current page to evaluate content.
scriptingRun content scripts for on-page checks.
<all_urls>Check broken links and image sizes found on the page you're analyzing.
notificationsShow a local, on-device notification when a new version is installed.

All analysis is client-side and uses only required extension permissions.

How to Install

From Chrome Web Store

Open the Chrome Web Store listing.
Click “Add to Chrome”.
Confirm the installation prompt.

Open Web Store

Manual (Developer Mode)

Clone or download the extension repository.
Open chrome://extensions/ and enable Developer mode.
Click “Load unpacked” and select the extension folder containing manifest.json.

SEO Checklist Chrome Extension FAQs

It runs a client-side on-page SEO analysis of the active tab, checking title and meta quality, headings, content depth, image alt coverage, links, canonical and viewport tags, schema presence, analytics detection, social metadata preview, and broken-link status.

Yes. SEO Checklist is free to install and use from the Chrome Web Store.

Open the Chrome Web Store listing and click “Add to Chrome”. For development, enable Developer mode at chrome://extensions and use “Load unpacked”.

No. SEO Checklist does not collect, store, or transmit data. Analysis runs locally in your browser.

Yes. SEO Checklist is a completely free SEO checker Chrome extension. Install it from the Chrome Web Store and run unlimited on-page SEO checks with no sign-up and no paywall.

Yes. Open any web page and the extension analyses its on-page SEO in one click — including competitor pages — because the check runs on the page you are viewing in your browser.

An SEO checker extension analyses the exact page open in your browser instantly, with no URL pasting or usage limits, and works even on staging or logged-in pages that online SEO checkers cannot reach.

Changelog

v1.4 (March 2026) - Added more exact SEO scoring, heading order validation, discernible link name checks, image optimization opportunities, and printable PDF report export.
v1.3 (March 2026) - Added social preview analyzer, quick SEO tool launcher, and improved broken-link visibility.
v1.0.0 - Initial release with core on-page SEO checklist and scoring workflow.

Full changelog available in the GitHub repository.

SEO Checklist — Free On-Page SEO Checker Chrome Extension