Fast Site Check — Browser Extension
Run a complete SEO audit on any webpage with one click — right from your browser toolbar.
Instant SEO Audits From Your Browser
The Fast Site Check browser extension puts professional-grade SEO auditing at your fingertips. No need to copy-paste URLs — just click the extension icon while browsing any website and get a full SEO health report instantly.
Whether you're reviewing a competitor's site, checking your own pages after a redesign, or doing a quick SEO sanity check before publishing, this extension saves you time and keeps SEO top-of-mind.
What the Extension Does
One-Click Audit
Click the toolbar icon on any page and instantly run a comprehensive SEO audit — no URLs to type.
Meta Tag Analysis
Check title tags, meta descriptions, Open Graph tags, and Twitter cards in seconds.
SEO Score
Every page gets a 0–100 SEO score based on industry best practices, with actionable recommendations.
Broken Link Detection
Find broken internal and external links that hurt user experience and search rankings.
Page Speed Check
Identify performance issues that slow down your site and hurt Core Web Vitals.
Right-Click Audit
Right-click on any page and select "Audit this page with Fast Site Check" from the context menu.
How to Install
Download
Download the extension ZIP file using the button below.
Extract
Unzip the downloaded file to a folder on your computer.
Load Extension
Open chrome://extensions, enable "Developer mode", and click "Load unpacked". Select the extracted folder.
Download Fast Site Check Extension
Free. No sign-up required. Works on Chrome, Edge, Brave, and all Chromium-based browsers.
⬇ Download Extension (ZIP)Frequently Asked Questions
Yes, the Fast Site Check extension is completely free. No ads, no premium features hidden behind a paywall.
Currently the extension is designed for Chromium-based browsers including Google Chrome, Microsoft Edge, Brave, and Opera. Firefox and Safari support is planned for a future release.
No. The extension only reads the URL of the current tab when you click the audit button. No browsing data, history, or personal information is collected or transmitted.
We're working on publishing the extension to the Chrome Web Store. In the meantime, you can install it manually using the steps above.