Is SEOquake completely free?

Yes. SEOquake is completely free with no premium tier. All features — SERP overlay, on-page SEO audit, keyword density analysis, internal/external link counts, page age, and index status — are available without any account or payment.

Does SEOquake work on Firefox?

Yes. SEOquake has official versions for Chrome and Firefox. Both versions offer the same full feature set including the SERP overlay, on-page audit, and SEO bar.

SEOquake is made by Semrush, one of the largest SEO software companies. The extension pulls some data from Semrush's database (like Authority Score) but is offered as a completely free standalone tool with no Semrush subscription required.

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Updated April 2026

SEOquake Review 2026:
Best Free SERP Overlay Extension

Name: SEOquake
Rating: 4.3 (1420 reviews)
Author: Semrush

SEOquake is the most data-rich completely free SEO browser extension. No account, no paywall — full SERP overlay, on-page audit, and keyword density on every page. Here's how it compares in 2026.

100% free — no account needed Chrome & Firefox Made by Semrush

Editor's Verdict

SEOquake is the most generous free SEO extension available in 2026. No account, no limits, no premium tier — every feature works out of the box. The SERP overlay is the best available for free, and the on-page audit covers all the basics. Interface is older and denser than Ahrefs Toolbar, but no other free tool matches the sheer volume of data it surfaces.

Overall

4.3 / 5

Free features

5.0 / 5

Data depth

4.4 / 5

Ease of use

3.5 / 5

What Is SEOquake?

SEOquake is a free browser extension built by Semrush that overlays SEO metrics on Google search results and provides detailed on-page analysis for any website you visit. Unlike most SEO extensions that lock key features behind a subscription, SEOquake is completely free — all features, no account required.

It has been downloaded over 3 million times and is particularly popular with SEO analysts who want full SERP data without paying for a Semrush subscription.

All Features — 100% Free

Feature	Available for free?	Notes
SERP overlay (all results)	✓ Yes	Authority Score, backlinks, traffic est., age
On-page SEO audit	✓ Yes	Meta tags, headers, canonicals, robots
Keyword density report	✓ Yes	Top keywords by frequency on any page
Internal/external link counts	✓ Yes	Shown in the SEO bar
Google index status	✓ Yes	Check if page is indexed
Whois lookup	✓ Yes	Domain age and registration info
Social share counts	Limited	Facebook shares (others deprecated)
Export SERP to CSV	✓ Yes	Export all SERP metrics to spreadsheet

SERP Overlay — The Standout Feature

SEOquake's SERP overlay is its strongest differentiator. For every result on a Google search page, it displays a metrics bar showing Semrush Authority Score, estimated organic traffic, number of backlinks, and page age. This is the most data-rich free SERP overlay available in 2026 — MozBar requires a free account, Ahrefs Toolbar requires a paid subscription.

The overlay can be toggled on/off with a single click and customised to show only the metrics you care about, reducing visual clutter.

On-Page SEO Audit

Clicking the SEOquake icon on any page opens a full on-page report covering: page title and meta description (with character counts), H1–H6 structure, canonical tag, robots meta, Open Graph tags, schema markup detection, and internal vs external link totals. It does not trace redirect chains — for that, use Ahrefs Toolbar or Link Redirect Trace.

Pros

100% free — no account, no paywalls, no limits
Best free SERP overlay — more data than any competitor
CSV export of SERP data for analysis in spreadsheets
Chrome and Firefox supported
Keyword density report useful for content analysis
Index status checker built-in

Cons

Interface is dense and dated — steeper learning curve
No redirect chain tracing
No Safari support
Data powered by Semrush index — may differ from Ahrefs/Moz
Can slow down Google SERP page rendering slightly
SERP overlay can be visually cluttered with all metrics on

SEOquake vs Ahrefs Toolbar vs MozBar

Feature	SEOquake	Ahrefs Toolbar	MozBar
Completely free (all features)	✓	Partial	Partial
SERP overlay free	✓	Paid	Free account
On-page audit free	✓	✓	Limited
Redirect tracer	✗	✓	✗
CSV export	✓	✗	✗
Firefox	✓	✓	✓
Safari	✗	✓	✗

Install SEOquake — It's Free

The most data-rich free SEO extension. No account needed.

Add to Chrome → Free

Frequently Asked Questions

Yes — completely free, no premium tier, no account required. Every feature (SERP overlay, on-page audit, keyword density, CSV export, index checker) works immediately after installing.

Yes. SEOquake has an official Firefox version available on the Mozilla Add-ons directory. It offers the same full feature set as the Chrome version.

SEOquake is made by Semrush, one of the largest SEO platforms. The extension uses Semrush's database for Authority Score and traffic estimates but is offered completely free as a standalone tool — no Semrush account or subscription needed.

Yes. SEOquake has a built-in CSV export for SERP data — you can capture all metrics for every result on a Google search page and export to a spreadsheet. This is a feature no other free SEO extension offers.

SEOquake Review 2026:Best Free SERP Overlay Extension