Best Google Chrome SEO Extensions in 2021

SEO is rarely a game of chance. Your page rank is tied to your SEO efforts, but a good position is never guaranteed.

Automation might seem like it would make keyword review and research simpler, but how accurate is your data? How do you know that an SEO extension is giving you up-to-date links and suggestions? And just how useful are those results for your site?

Much like any other extension for Chrome, SEO extensions are easy to install. That’s the good news. The bad news is that there are over 150,000 SEO extensions available to choose from. And relying on those that promise high keyword frequency results is no longer enough for your SEO strategy in 2021.

person using black laptop computer to install Google Chrome SEO extensions
Google Chrome SEO Extensions. Photo by Nathana Rebouças.

We’ve narrowed down the choices for the best Google Chrome SEO extensions to help you streamline your strategy. Whether you’re monitoring your website ranking or ensuring your backlinks and keyword pools are up to date, don’t rely on second-guessing for your SEO strategy. Let these solutions do the leg work for you.

SEOquake by SEMrush

SEOquake is a free plugin for Chrome providing web admins with key SEO metrics and detailed analyses of their search result pages.

Responsive web design is an essential factor in any SEO strategy.

SEOQuake delivers a powerful analytical solution to help you audit your onsite and offsite links and compare top-ranking URLs and domains, saving you time and error in managing your SERP.

SEO Toolbar by Ahrefs

The SEO toolbar extension from Ahrefs is a free version of the essential payware solution for Chrome, and its very simplicity can make a world of difference in optimizing your search results. While the metrics it scans for are simple, they are fundamental to your website’s search engine performance.

Broken links and nofollow tags can eventually destroy your search campaign. The Ahrefs SEO Chrome extension gives you analytical and real-time results in a matter of seconds so you can redesign your content and make the most out of your SERP position.

SEO Minion

The primary focus of SEO Minion is on-page SEO analysis.

With in-depth details on any result, you can analyze and review a page’s metadata and structure on your site to follow the best results.

SEO Minion also highlights both inbound and outbound links, allowing you to analyze link profiles in real-time while checking for valid and return tags.

Free Backlink Checker by LRT

Broken links are the recurring bane of any web admin. But it’s not just dead links you have to worry about — it’s backlinking to optimal sources. Follow the rules mentioned at to avoid penalties when gaining backlinks.

black and blue laptop computer with broken SEO links
Broken links hurt your SEO. Photo by Erik Mclean.

LRT’s Free Backlink Checker is a free SEO extension for Chrome that analyzes all available links on a webpage. By categorizing each link into internal, external, broken, and unverified groupings, the Backlink Checker plugin allows you to validate the strength of your backlinking, showing you the actual source code for quick review and adjustment.

Email Finder Extension by

Backlinking to other sites is mutually helpful for both offsite web admins and your SEO strategy. But if you’ve ever tried to find necessary contact information during a search, you’ll know it’s not always easy.’s Email Finder Extension provides you with all the necessary contact information you need, including associated email addresses, departments, and titles from public sources.

You can also refer to their backlink generation service to get quality backlinks.

SEO Extension by Mangools

This SEO Extension can be almost as powerful as the paid version from Mangools. With metrics including domain and page authority, social media shares, backlink checkers, IP referrals, and full on-page SEO analysis, you can safely analyze both offsite and on-page traffic quickly and efficiently.

The SEO Extension’s keyword checker can help you evaluate both your campaign’s keyword difficulty and density and your competitors’ campaigns, making sure your content research only includes the most valid and optimal results.


SeoStack is a free plugin designed for long-tail keyword research management.

Using multiple search engines (including Google, DuckDuckGo, Amazon, YouTube, and Pinterest), SeoStack can generate a pool including thousands of low competition long-tail keywords.

It’s the perfect tool for gaining the upper hand in ranking when competitors are still relying on ineffective and repetitive keyword strings. 

MozBar by Moz

Moz has been one of the most trusted SEO resources since 2004, and their MozBar SEO extension for Chrome is perfect for in-depth on-page analysis of competitors.

Customize your searches by geographic location and search engine to compare SEO metrics, including tags, domain authority, metadata, links, and real-time keyword analysis.

MozBar is available as both a paid solution and a free plugin with limited features.

Open in SEMrush

Open in SEMRush is a free SEO extension for Chrome, allowing you instant access to SEMrush’s basic dashboard with a simple click.

SEMrush’s plugin is perfect for analyzing paid campaigns and organic traffic, giving you understandable insight into what’s driving your page views.

A simple but effective keyword analytics feature helps you audit and update your keyword pool, ensuring that you never run out of fresh and customizable results for your SEO campaign.

What Chrome extensions do you use to monitor your SEO metrics or campaigns? Let us know in the comments.

About Frank Hamilton

Frank Hamilton is a blogger and translator from Manchester. He is a professional writing expert in such topics as blogging, digital marketing, and SEO. He also loves traveling and speaks Spanish, French, German, and English.

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