16 SEO Chrome Extensions Worth Installing in 2026

Originally published: July 29, 2020. Last updated: Oct 10, 2026.

Search engine optimization is a vast field, and each SEO tool covers a different part of it. No single browser extension does everything well, but the right combination can replace a surprising amount of paid software. Chrome extensions sit where the work happens: inside your search results, inside a competitor’s page source, and across every page you audit.

This guide is the 2026 shortlist: sixteen extensions that still exist, still work in current Chrome, and earn their place for one specific job. Four recommendations from the earlier version of this guide are gone for good. Amazon retired Alexa Internet in May 2022, so the Alexa Traffic Rank extension is dead. Firebug Lite was abandoned years ago. Project Naptha, untouched since 2020, is being switched off by Chrome for running on the retired Manifest V2 standard. And PicMonkey was never a Chrome extension at all, so it should never have been listed here.

The All-Round SEO Toolbars

Start with one toolbar that does page audits, SERP overlays, and link checks. You need one, not four, so pick the one that fits your budget and workflow.

1. Ahrefs SEO Toolbar

Ahrefs SEO Toolbar is the extension most working SEOs install first. Click it on any page for an on-page report covering the title, meta description, headings, canonical tags, indexation directives, structured data, and HTTP headers. On Google results it overlays backlink and authority data, lets you switch country and language without a VPN, and traces redirect chains. The diagnostics are free; the proprietary metrics (Domain Rating, traffic estimates) unlock if you have a paid Ahrefs plan. Per the Distribb 2026 roundup, it has around 400,000 Chrome users. The toolbar also highlights outgoing links by type, which makes it handy when you evaluate what makes a backlink valuable on a page you are considering for outreach.

2. Detailed SEO Extension

Detailed SEO Extension, built by Glen Allsopp, is the cleanest one-click page inspector available. It shows the title tag, meta description, canonical, robots directives (including X-Robots HTTP headers), an indented heading outline, schema markup, links, and images in a single panel. A right-click menu sends the current page to Ahrefs, Moz, Majestic, Similarweb, Semrush, or the Wayback Machine. It is completely free with no upsells and no tracking, and it will stay that way: Ahrefs acquired Detailed in 2025 and confirmed all functionality remains free. If you only want a 30-second page QA before publishing, this is the one.

3. SEOquake

SEOquake, Semrush’s free toolbar, is the workhorse for SERP analysis. It adds a metrics bar under every Google result (indexed pages, backlinks, Semrush rank), runs on-page audits, checks keyword density, reports internal and external links, and exports everything to CSV or PDF. In September 2026 Semrush released a rebuilt version with a Quick View popup, AI Overview source analysis, and URL side-by-side comparison. Core features work without a Semrush account; connecting a free account adds Authority Score and traffic estimates. Around one million Chrome users run it.

4. MozBar

MozBar overlays Moz’s Domain Authority and Page Authority on any page or search result, which makes it the fastest way to judge a site’s link authority at a glance. The toolbar was rebuilt as MozBar V5 for speed. On-page checks are free, but DA and PA now require a free Moz account sign-in, and Spam Score needs Moz Pro. It remains the standard pick for quick authority checks during link prospecting and competitor research.

Keyword Research Extensions

These two put search volume and keyword ideas directly inside Google’s results, so research happens while you browse instead of in a separate dashboard.

5. Keywords Everywhere

Keywords Everywhere adds search volume, CPC, and competition data to Google, YouTube, Amazon, eBay, Bing, and more than a dozen other sites, plus related keywords and “people also search for” widgets in the sidebar. It has over 1.6 million users. The extension is free to install and several features (traffic metrics, keyword widgets, prompt templates) are free, but accurate volume and CPC data runs on paid credits: one credit per keyword lookup. The CPC figures are especially useful if you also run paid campaigns, since they feed the same PPC planning process your keyword research tools support.

6. Keyword Surfer

Keyword Surfer, from the Surfer SEO team, is the completely free alternative: it overlays estimated monthly volume, CPC, and related keyword ideas with similarity scores directly onto Google’s results, and shows on-page data like word counts for ranking pages. Around 600,000 people use it, and it was still being updated in early 2026. The numbers are estimates rather than paid-source data, so use it for fast triage and confirm shortlisted keywords in a planner. Content writers love it because every query they run to understand search intent now shows volume beside it.

On-Page and Technical Checks

When something is broken, you need a specialist, not a dashboard. These five each answer one technical question in one click.

7. SEO Meta in 1 Click

SEO Meta in 1 Click displays every meta fact about a page in a single panel: title and description with character counts, canonical, meta robots, the full heading hierarchy in document order, image alt coverage, link counts, Open Graph and Twitter tags, plus quick links to robots.txt and sitemaps. With 900,000 users and a 4.87 rating, it is the privacy-friendly pick too: it runs on the active tab only instead of reading every site you visit. It overlaps with Detailed, so install one or the other, not both.

8. Check My Links

Check My Links crawls every link on the open page and highlights valid links in green and broken ones in red, with a downloadable report. Broken links are an SEO and user-experience problem, and this is the fastest way to find them during a content refresh. It also powers broken link building: scan a resource page in your niche, find dead outbound links, and pitch your content as the replacement. Note it checks one page at a time, so site-wide audits still need a crawler.

9. Redirect Path

Redirect Path, from Ayima, flags 301, 302, 404, and 500 status codes plus meta and JavaScript redirects as you browse, and shows the full redirect chain and HTTP headers at one click. Long chains leak link equity and slow pages down, and this is the fastest way to spot them during migrations or routine checks. Version 4, detailed on Ayima’s site, adds free AI-assisted diagnosis of redirect chains and errors. Around 300,000 SEOs use it, and everything runs locally in your browser.

10. Wappalyzer

Wappalyzer identifies the technology behind any site: CMS, ecommerce platform, JavaScript frameworks, analytics tools, CDNs, payment processors, and more than a thousand other technologies. With 3 million users, it is the default tool for competitive reconnaissance. Wondering how a competitor’s fast site is built, or which analytics stack they run? One click tells you, with results exportable to CSV.

11. Tag Assistant

Tag Assistant is Google’s official extension for verifying tag installations. Open it on any page to see which Google tags are present (GA4, Google Ads, Tag Manager), then hit Troubleshoot to start a debug session on tagassistant.google.com with full diagnostics. Note the history: Google retired the old Tag Assistant Legacy, replaced it with Tag Assistant Companion, then merged both into one unified extension in December 2024 after user feedback. Install the unified Tag Assistant, not the deprecated Companion.

YouTube SEO

12. vidIQ Vision for YouTube

vidIQ Vision for YouTube overlays analytics, SEO scores, keyword data, and competitor insights directly onto YouTube watch pages and the upload screen in YouTube Studio. With 3 million users, it is the standard browser companion for video SEO: research what the audience searches, score your titles and tags, and compare your videos against competitors without leaving YouTube. It pairs naturally with a serious video marketing strategy, and the free tier covers the essentials for a new channel.

Content and Trust

13. Grammarly

Grammarly brings real-time grammar, spelling, clarity, and tone checks to every text field in your browser: Google Docs, WordPress, email, and social posts. With over 10 million users, it is the most-installed writing assistant on the store, and the free tier covers the corrections that matter most for published content. Typos and clumsy sentences erode trust on commercial pages, so running drafts through it is cheap insurance. For longer guides on making content rank, see our SEO tips for food blogs, where the same editing discipline applies to recipes.

14. Ghostery

Ghostery is an open-source tracker and ad blocker with over 100 million downloads. For marketers it has a second job beyond privacy: it shows exactly which trackers, ad networks, and consent tools each page loads, grouped by company. That makes it a quick way to audit a competitor’s marketing stack or to see how heavy your own pages are before you test load times. It is free forever, and blocking trackers also speeds up the pages you research.

Design Extensions

15. ColorZilla

ColorZilla is the veteran color toolkit: an eyedropper that samples any pixel on a page, a Photoshop-style color picker, a CSS gradient generator, a webpage color analyzer that lists every color a page uses, and a color history. With over 10 million downloads, it is the standard pick when you need exact hex values from a competitor’s design or want to check your own palette for consistency. Completely free, no account needed.

16. WhatFont

WhatFont identifies any font on a page: hover over text to see the family, size, weight, line height, and color, and click for the full CSS spec. The current version can even identify fonts inside images and logos, and it lists every font the page loads. With over 4 million users, it is the fastest answer to “what font is that?” when you are auditing a competitor’s typography or matching a brand’s style.

All 16 Extensions Compared

A Starter Stack: Five Extensions to Install First

Sixteen extensions is a reference list, not a shopping list. If you are starting from zero, these five cover almost everything: Detailed SEO Extension for page audits, Keyword Surfer for keyword volumes, Check My Links for broken links, Redirect Path for status codes, and Wappalyzer for competitive research. All five are free and none require an account. Add Keywords Everywhere when you need accurate CPC data, MozBar when you start prospecting links seriously, and Tag Assistant the day you touch Google tags.

Conclusion

The extension landscape changes faster than most roundups admit, which is why this guide now names the tools it removed and why. Install from the official Chrome Web Store listings linked above, keep your stack small, and re-check anything an old article recommends before you trust it. Fit these tools into a wider plan for reaching customers through digital marketing, and the browser becomes the fastest SEO audit station you own.

Frequently Asked Questions

Are SEO Chrome extensions free?

Mostly yes. Every extension in this guide has a usable free tier. The exceptions to know: Keywords Everywhere charges credits for accurate volume and CPC data, Ahrefs SEO Toolbar reserves its proprietary metrics for paid subscribers, and MozBar needs a free Moz account for authority metrics plus Moz Pro for Spam Score.

Which SEO Chrome extension should I install first?

Install Detailed SEO Extension first. It is free, needs no account, and answers the most common question, what is wrong with this page, in one click. Add the Ahrefs SEO Toolbar second if you want SERP overlays and backlink data, or SEOquake if you prefer an all-in-one free toolkit.

Is the Alexa Traffic Rank extension still available?

No. Amazon retired Alexa Internet on May 1, 2022, so there is no live Alexa Rank to check and no working extension. Any article still recommending it is outdated. Use MozBar, Ahrefs SEO Toolbar, or SEOquake for authority and traffic estimates instead.

What happened to Google Tag Assistant?

Google first deprecated the old Tag Assistant Legacy extension, then merged it with Tag Assistant Companion into a single unified Tag Assistant extension in December 2024. Install the unified Tag Assistant from the Chrome Web Store; the old Companion listing is deprecated.

Should I use Keywords Everywhere or Keyword Surfer?

Use Keyword Surfer if you want a completely free tool for quick volume estimates inside Google results. Use Keywords Everywhere if you need accurate volume, CPC, and competition data across Google, YouTube, Amazon, and other sites, and you are willing to pay per-lookup credits for it. Many SEOs run both.

Are Chrome extensions safe to use on client sites?

Stick to the official Chrome Web Store listings linked in this guide, check the publisher name before installing, and review the permissions each extension requests. Extensions that read data on every site you visit carry more risk than ones like SEO Meta in 1 Click that only run on the active tab. Never install SEO extensions from third-party download sites or email links.