15 Best Chrome SEO Extensions to Install Today (2026)
You don't need to open a separate dashboard every time you want to check a page's title tags, spot nofollow links, or see what a competitor's site is built on. A well-chosen set of Chrome extensions puts most of that information one click away, directly inside your browser, while you're already researching or browsing.
Below are 15 free (or freemium) Chrome extensions that genuinely earn a spot in an SEO's toolbar — covering on-page audits, technical checks, link analysis, and competitive research.
Before installing anything, it's worth running your own site through our free website SEO score checker and meta tag analyzer so you know what a baseline audit already tells you — extensions are most useful for quick, page-by-page checks on top of that.
What Makes a Good SEO Extension
Not every extension deserves a permanent spot in your toolbar. The ones worth keeping installed generally do one of these well:
- Surface on-page data (titles, headers, meta tags) without viewing source
- Flag technical issues (broken links, redirect chains, missing alt text) in real time
- Show competitive or backlink data without switching tabs
- Add negligible load time and don't track your browsing beyond their stated purpose
With that filter applied, here are the 15 that hold up.
1. MozBar
MozBar overlays Domain Authority (DA) and Page Authority (PA) scores directly on Google search results, along with on-page metrics like title length, header structure, and link counts for any page you visit. It remains one of the most widely used SEO extensions for quick competitive scans.
Best for: Fast authority checks while browsing SERPs.
2. Ahrefs SEO Toolbar
Ahrefs SEO Toolbar shows Ahrefs' own Domain Rating (DR) and URL Rating (UR) scores, plus a full on-page SEO report — status codes, canonical tags, hreflang, and word count — for any page, without leaving the tab.
Best for: Ahrefs users who want its authority metrics available everywhere, not just in the dashboard.
3. SEOquake
SEOquake is one of the longest-running free SEO extensions, generating a dense on-page audit (keyword density, internal/external link counts, microdata, and more) with a single click. It's dated in appearance but still packs in more raw data than most modern alternatives.
Best for: Detailed, exportable on-page audits. Pair it with: Our own meta tag analyzer for a second opinion on title and description accuracy.
4. Keywords Everywhere
Keywords Everywhere displays search volume, CPC, and competition data directly inside Google, YouTube, Amazon, and Bing search results, along with related and "People Also Search For" keyword suggestions. It requires a small paid credit balance but remains one of the most efficient ways to research keywords passively.
Best for: Keyword research that happens naturally while you browse. Pair it with: Our free keyword research tool and related keywords finder for unlimited lookups without credits.
5. Keyword Surfer
Keyword Surfer by Surfer SEO shows estimated monthly search volume and related keywords directly in Google's results page, entirely free, with no credit system. It also displays word counts for top-ranking pages, giving a rough content-length benchmark for a given query.
Best for: Free volume estimates without the credit limits Keywords Everywhere imposes.
6. Detailed SEO Extension
Detailed SEO Extension delivers a clean, no-clutter breakdown of a page's meta tags, headers, images (with missing alt text flagged), and link data — built by the team behind Detailed.com's SEO newsletter, and genuinely well-designed for quick page checks.
Best for: A fast, readable on-page audit without SEOquake's visual clutter.
7. SEO Minion
SEO Minion bundles several checks into one tool: broken link detection, on-page SEO analysis, SERP preview simulation, and Google/Bing local search result comparison by location — useful for agencies checking how rankings differ by geography.
Best for: Checking for broken links and previewing SERP snippets before publishing. Pair it with: Our online ping website tool after fixing broken links to prompt faster re-crawling.
8. META SEO Inspector
META SEO Inspector provides a granular breakdown of meta tags, Open Graph data, Twitter Card tags, structured data, and heading hierarchy — useful when auditing how a page will actually appear when shared on social platforms.
Best for: Validating social sharing tags before content goes live. Pair it with: Our Open Graph generator and Twitter Card generator to fix any gaps it finds.
9. Check My Links
Check My Links scans a page and highlights every link as valid (green) or broken (red) in seconds — one of the fastest ways to catch dead links before they hurt user experience or crawl efficiency.
Best for: Quick broken-link checks on long content pages. Related reading: How to fix broken internal links.
10. Wappalyzer
Wappalyzer identifies the technology stack behind any website — CMS, analytics tools, hosting provider, JavaScript frameworks, and more — useful for competitive research and for diagnosing whether a client's slow site is a platform-level issue.
Best for: Understanding what a competitor's site is built on.
11. BuiltWith
BuiltWith offers a similar technology-detection function to Wappalyzer but with a deeper historical database, useful when you want to see how long a competitor has used a particular platform or tool.
Best for: Deeper technology and historical stack research.
12. Redirect Path
Redirect Path (by Ayima) traces the full chain of redirects for any URL, showing each hop's status code — essential for diagnosing redirect loops or unnecessary multi-step redirects that dilute link equity and slow page load.
Best for: Debugging messy redirect chains. Related reading: How to optimize redirects for SEO.
13. NoFollow
The NoFollow extension highlights every nofollow link on a page with a colored border, making it easy to visually distinguish which outbound links pass authority and which don't — handy for both link-building outreach and competitor backlink audits.
Best for: Quickly spotting nofollow vs. dofollow links during outreach.
14. Web Vitals
Web Vitals is Google's own official extension, showing real-time Core Web Vitals scores (LCP, CLS, INP) as you browse, with a badge icon that changes color based on performance. It's the fastest way to spot a slow or unstable page without running a full PageSpeed report.
Best for: Real-time Core Web Vitals monitoring while browsing. Related reading: How Core Web Vitals affect your rankings.
15. Similarweb Extension
The Similarweb extension shows estimated traffic, engagement, and top traffic sources for any domain you visit — useful for a fast gut-check on how much traffic a competitor is actually getting before investing time in deeper research.
Best for: Quick competitive traffic estimates without opening a separate dashboard.
Building Your Own SEO Extension Toolbar
Installing all 15 at once will slow your browser down and clutter your toolbar. A more practical approach:
- For on-page audits: MozBar or Ahrefs SEO Toolbar + Detailed SEO Extension
- For technical checks: Check My Links + Redirect Path + Web Vitals
- For keyword research on the fly: Keyword Surfer or Keywords Everywhere
- For competitive research: Wappalyzer + Similarweb Extension
- For content and sharing validation: META SEO Inspector + NoFollow
For anything these extensions don't cover in depth — full-site crawls, bulk audits, or historical tracking — you'll still want a dedicated tool. Our technical SEO crawler tools comparison and site audit tools for agencies guide cover that next step well.
Frequently Asked Questions
1. Are Chrome SEO extensions safe to use?
Reputable extensions from well-known SEO companies (Moz, Ahrefs, Surfer) are safe, but always check permissions requested during installation — an extension asking for more access than its function requires is a red flag.
2. Do SEO extensions slow down my browser?
A handful running simultaneously shouldn't cause noticeable slowdown, but installing 15+ active extensions at once can. It's better to enable only the ones relevant to your current task.
3. Which extension is best for checking Domain Authority?
MozBar remains the standard for Domain Authority (DA) specifically, since DA is Moz's proprietary metric. Ahrefs SEO Toolbar shows the equivalent Domain Rating (DR) if you prefer Ahrefs' scoring.
4. Can I do full keyword research with just an extension?
Extensions like Keyword Surfer and Keywords Everywhere are excellent for quick volume checks, but for building out full keyword lists and clusters, a dedicated tool like our keyword research tool or related keywords finder will get you further, faster.
5. What's the best free extension for checking Core Web Vitals?
Google's own Web Vitals extension is the most accurate, since it pulls directly from the Chrome User Experience Report methodology Google uses in ranking.
6. Do I need both MozBar and Ahrefs SEO Toolbar?
Not necessarily — they overlap significantly. Most SEOs pick whichever platform's paid subscription they already use, since the authority metrics are proprietary to each tool.
7. Which extension is best for finding broken links quickly?
Check My Links is the fastest for a single-page scan; for full-site broken link audits, pair it with a crawler like Screaming Frog.
8. Can these extensions replace a full SEO audit tool?
No — they're excellent for spot-checks and research on the fly, but a proper audit (crawl errors, indexation issues, sitewide duplicate content) still requires a dedicated crawler or platform.
9. Is Wappalyzer or BuiltWith better for tech stack research?
Wappalyzer tends to be faster and more actively maintained for current detection; BuiltWith has a deeper historical archive if you need to see how long a site has used a given technology.
10. Do any of these extensions work on mobile?
No — Chrome extensions only run in the desktop browser. For mobile-specific checks, use our mobile-friendly test instead.