7 Free Chrome Extensions That Make SEO Research Painless

You do not need a $200/month SEO platform to do solid keyword research and competitor analysis. Some of the best SEO intel is available for free, right inside your browser. All you need are the right Chrome extensions.

Here are seven that we use regularly, all completely free, that turn your browser into a lightweight SEO research machine.

1. MozBar

What it does: Displays domain authority (DA) and page authority (PA) for every search result, plus a quick look at any page’s on-page elements (title tag, meta description, headers, alt text).

Why it is useful: When you search for a keyword and see that the top results all have DA scores above 70, you know that keyword is going to be tough to rank for. If you see results with DA in the 20s and 30s, that is a signal you have a realistic shot. MozBar gives you this competitive read in seconds, right on the search results page.

Best for: Quick keyword difficulty assessment and competitor analysis.

2. SEOquake

What it does: Overlays a wealth of SEO data on every page you visit and every search result you see. Domain age, number of indexed pages, backlink count, keyword density, and more.

Why it is useful: SEOquake is like a Swiss Army knife for SEO research. The SERP overlay lets you compare competitors side by side without opening a single extra tool. The on-page audit feature catches issues like missing meta descriptions or overstuffed keyword density.

Best for: Comprehensive at-a-glance competitor metrics. Pairs well with the research approach we covered in how Google actually ranks your website.

3. Keywords Everywhere

What it does: Shows search volume, cost-per-click, and competition data directly below keywords in Google, YouTube, Amazon, and other platforms. The free version provides related keywords and “People also search for” data (paid version adds volume numbers).

Why it is useful: Even the free version is valuable. Seeing related keywords and long-tail variations as you browse gives you content ideas without switching to a separate tool. Combine it with our keyword research guide and you have a solid process.

Best for: Discovering keyword opportunities during normal browsing.

4. Detailed SEO Extension

What it does: Gives you a one-click breakdown of any page’s SEO structure: title tag, meta description, canonical URL, headers (H1 through H6), images with alt text, schema markup, Open Graph tags, and more.

Why it is useful: When you want to see exactly how a competitor structured a high-ranking page, this extension lays it all out in a clean sidebar. It is the fastest way to reverse-engineer what is working for the top results. You can check if they are using schema markup and exactly what types they have implemented.

Best for: On-page SEO analysis and competitor page audits.

5. Google Lighthouse (Built into Chrome)

What it does: Runs a full performance, accessibility, best practices, and SEO audit on any page. Technically not a Chrome extension since it is built into Chrome DevTools, but it deserves a spot on this list.

Why it is useful: Lighthouse gives you a performance score and specific, actionable recommendations for improvement. It is the same engine behind Google PageSpeed Insights, but you can run it directly from your browser without visiting a separate site.

How to access: Right-click on any page, select “Inspect,” click the “Lighthouse” tab, and run an audit. It takes about 30 seconds.

Best for: Technical SEO audits and performance checks. Great companion to an SEO audit process.

6. Redirect Path

What it does: Displays the full redirect chain for any URL you visit. Shows whether redirects are 301 (permanent), 302 (temporary), or something else, and flags any issues.

Why it is useful: Redirect chains are invisible to most people but can seriously hurt SEO. If a page goes through three redirects before landing on the final URL, that slows down load times and dilutes link equity. Redirect Path catches these issues as you browse, with a simple color-coded indicator in the toolbar. Green means no redirects. Yellow or red means something needs attention.

Best for: Catching redirect issues during site migrations and routine browsing.

7. Link Redirect Trace

What it does: Similar to Redirect Path, but with added detail. Shows the full HTTP header response, redirect type, and any rel-canonical information. Also flags potential issues with mixed HTTP/HTTPS content.

Why it is useful: This is the more advanced version of redirect checking. When you are troubleshooting a specific URL that is not ranking as expected or investigating why a page is not being indexed, Link Redirect Trace gives you the full picture.

Best for: Deep-dive technical troubleshooting and canonicalization issues.

Bonus Tip: Combine Extensions Strategically

You do not need to run all seven extensions at once (that would slow your browser to a crawl). Here is how we use them:

• For keyword research sessions: Keywords Everywhere + MozBar
• For competitor analysis: SEOquake + Detailed SEO Extension
• For technical audits: Lighthouse + Redirect Path or Link Redirect Trace
• For quick checks on the go: MozBar alone

Enable the extensions you need for the task, disable the rest. Chrome’s extension management makes this easy.

Free Tools, Real Results

These extensions will not replace a full SEO platform if you are running a large-scale campaign. But for small business owners who want to understand their search landscape, spot opportunities, and check competitors without spending a dime, this toolkit covers a surprising amount of ground.

Pair these extensions with the free SEO tools we have recommended before and you have a seriously capable research setup at zero cost.

Want someone to do the research for you and build a strategy around it? Reach out to our team and let us handle the heavy lifting.