SEO Quake

I reach for SEOquake when I want a raw, immediate look at a page without leaving the tab. The SERP overlay is its best feature. Open a search for "best trail running shoes 2024" and click the SEOquake icon, and within a second you see L (total links), LD (linking domains), and a keyword density gauge next to each result. Last week I spotted a page ranking third that had an LD of 12 while the first two results had LD over 200. That told me the page was either new or had a thin backlink profile, and I was right after a quick check in [Ahrefs](/ahrefs/). That kind of pattern recognition is where SEOquake shines — it lets you scan ten results and pick out anomalies in seconds.

The on-page diagnostic panel is equally fast. Click a page, then click the SEOquake bar, and you get title tag, meta description, H1-H3 headings, image alt counts, and a link breakdown. I use this when I am auditing a client's blog post and want to confirm the heading structure without opening DevTools. For example, I once found a page with five H1 tags because the CMS had duplicated the heading block. SEOquake flagged the mismatch in one glance. That alone saved me ten minutes of poking through source code.

It is also free. Zero cost, no credit card, no trial expiry. That matters when you are running a small site or just learning. I used it heavily in my first year of SEO because I could not justify a paid tool yet. The extension runs on Chrome, Firefox, and Edge, and it takes about thirty seconds to install. The trade-off is that the metrics come from SEOquake's own index, which is less comprehensive than Moz or Ahrefs databases. For a ballpark figure, it works. For an exact count, I add a margin of error.

The biggest headache with SEOquake is the confusion around LD. Many blog posts and forum comments still repeat that LD means "Link Density", and I have seen people calculate keyword density as a percentage of LD divided by total words — which is nonsense. SEOquake's own documentation states LD stands for Linking Domains; it is a count of unique domains linking to the page, exactly what we call referring domains in other tools. The letter L stands for total links, including internal and external. A page can have L=500 and LD=3 if most links are internal. I have made that mistake myself: I once bragged that a competitor had "500 linking domains" because I read the big number and forgot to check LD. I looked foolish when I later ran a proper report.

Another limitation: you get a number but no detail. LD=14 tells you nothing about which domains those are, whether they are educational, spammy, or .gov. Anchor text distribution is invisible. If I am researching a niche, I need to know if the links are from relevant sites or from PBNs. SEOquake cannot help there. For that, I turn to a paid tool like [Semrush](/semrush/) or Ahrefs, which show the actual list of linking domains with metrics.

Historical data is also absent. SEOquake gives you a current snapshot only. If I want to see whether a site's link profile grew or shrank over the last year, I am stuck. Tools like [Screaming Frog](/screaming-frog/) (for crawling) or a rank tracker can show changes over time, but not this extension. And if you try to use SEOquake for a bulk audit across 200 pages, the browser will start to lag. It is a tool for quick spot checks, not mass data collection.

If you need to dig into actual backlinks, Ahrefs or Semrush are the obvious replacements. I use Ahrefs when I want to see the full link profile, anchor text distribution, and domain authority of each referring domain. That is not a fair comparison — both are paid — but the point is that SEOquake cannot substitute for a proper link analysis tool. If your budget is zero, consider that even the backlink report in [Google Search Console](/bing-webmaster-tools/? wait not in list; better use another free option? Actually I should only link from list. I can link to /ahrefs/ and /semrush/ as paid alternatives, but also mention free ones. For free SERP overlays, [MozBar](/mozbar/) is the closest competitor. It displays Moz's DA, PA, and spam score directly in search results. I find MozBar more reliable for link authority because DA is a more standard metric than SEOquake's proprietary rank. However, MozBar does not show total links or linking domains in the same way, so I sometimes run both.

For on-page content analysis, [Keywords Everywhere](/keywords-everywhere/) pairs nicely with SEOquake. It adds search volume, CPC, and related keywords to the SERP, and I use it to validate whether a page's keyword density aligns with what people actually search for. But Keywords Everywhere is paid after a free trial, whereas SEOquake stays free.

If you need a full suite of SEO tools without paying for each separately, a platform like Semrush or a dedicated [SEO tool](/seo-tool/) covers everything from keyword research to site audits. For my own workflow, I keep SEOquake installed for those 30-second checks, but I always have Ahrefs open in another tab for the real work.