Ahrefs Backlink Checker: what the free tool shows and how to read the result

The Ahrefs Backlink Checker is a free tool that takes any domain or URL and returns how many referring domains and backlinks it has, plus a sample of those links with their anchor text. It works on sites you do not own, which is the point of it. Domain Rating and URL Rating are shown once you have a free Ahrefs account, and the much larger view of your own site comes from verifying that site in Ahrefs Free, which gives you the top 1,000 backlinks and keywords at a time.

Use the public checker for a quick read on a competitor or a prospective link partner. Use a verified account for your own site, and use Google Search Console alongside it, because that is the only backlink list that comes from Google rather than from a vendor's own crawl.

What the free checker gives you

• Referring domains. The number of separate websites linking to the target. This is the number that matters.
• Backlinks. The total number of individual links, which is always higher because one site can link many times.
• Domain Rating and URL Rating. Ahrefs' own 0 to 100 strength scores for the domain and the single page. Ahrefs states on the tool page that these become available with a free Ahrefs account and its browser extension.
• A sample of links. The source page, the anchor text, and whether the link is followed.

The free checker is a window into the paid product, so it shows a slice rather than the full list. That slice answers the question most people are actually asking, which is whether a site has a real link profile or a thin one.

What a verified site gets you, free

Ahrefs' free tier for site owners, published as Ahrefs Free, is the bigger prize and is often missed. You verify ownership of a site and get three tools on it. Ahrefs publishes these allowances:

Tool	What it does	Published allowance
Site Explorer	Your backlinks, your ranking keywords, your top pages by search traffic	Top 1,000 backlinks and 1,000 keywords visible at once
Site Audit	A technical and on page crawl against 170 plus checks, with a health score tracked over time	5,000 crawl credits per project per month, used only by HTML pages returning status 200
Web Analytics	Traffic sources, top pages, locations and browsers, without cookies by default	Up to 1 million events per project

Verified websites are unlimited. Competitor data and the deeper exports sit in the paid plans, which Ahrefs prices on its own pricing page.

The other tools in this category, fairly described

Tool	Whose links you can see	Where the data comes from	Free access
Ahrefs Backlink Checker	Any site	Ahrefs' own web crawl and index	Yes, a sample; more with a free account
Semrush Backlink Analytics	Any site	Semrush's own crawl, with its Authority Score	Limited daily reports on the free plan
Moz Link Explorer	Any site	Moz's index, with Domain Authority and Spam Score	Limited free queries
Majestic	Any site	Majestic's index, with Trust Flow and Citation Flow and topical trust	Limited free view
Search Console Links report	Your verified site only	Google itself	Yes, free, no limits worth worrying about
Bing Webmaster Tools	Your verified site, plus similar sites	Bing's index	Yes, free

None of the vendor scores are Google metrics. Domain Rating, Authority Score, Domain Authority and Trust Flow are each one company's model of link strength, built on that company's crawl. They are genuinely useful for comparing two sites inside one tool, and they are not comparable across tools. Pick one as your reference and judge everything on that single scale.

Five things worth acting on in any backlink report

1. Referring domains over time. A line that keeps climbing slowly is what a healthy site looks like. A vertical spike followed by a flat line is usually a purchased batch, and it stops earning.
2. Your top pages by referring domains. These are the pages the web has decided are worth citing. Link from them to the pages that make money, and keep them updated rather than writing something new.
3. Anchor text distribution. Mostly your brand name, your URL, and natural phrases is the normal pattern. A profile dominated by one commercial phrase is the signature of bought links.
4. The gap against two competitors. Run the checker on the two sites that outrank you. Look at which domains link to both of them and not to you. That list is your outreach plan, and it is the single most useful output of any backlink tool.
5. Lost links on pages that matter. A link that disappeared because a page was redesigned is usually recoverable with one polite email.

What the numbers do not decide for you

A high Domain Rating on the linking site is a weak reason to want a link on its own. The stronger reasons are whether the page is about your subject, whether a real person could click the link and want what you sell, and whether the site would have linked to you without being asked. Google's spam policies describe link schemes directly, including exchanging money or goods for links that pass ranking signals, so read them before you agree to any paid placement. For the tactics that hold up over years, see backlink strategy, and for the outreach itself, backlink email templates.

This page covers the Ahrefs Backlink Checker and the free alternatives to it, and how to read what they return. For what a link is worth and why, see what is a backlink. For running the same job inside Semrush, see the Semrush backlink audit.

Questions buyers ask about Ahrefs Backlink Checker

Why do two backlink checkers report completely different totals?

Each vendor crawls the web itself and keeps its own index, with its own rules about how long a dead link stays listed and whether redirects, images and sitewide footer links count. Compare one tool against itself over time and the trend is sound.

Is Domain Rating used by Google?

No. It is Ahrefs' own score, calculated from the links in Ahrefs' index. Treat it as a quick sort order for a list of sites, and look at the actual pages before deciding anything.

Does the free checker show every link to my site?

It shows a sample. For the full picture of your own site, verify it in Ahrefs Free for the top 1,000 links, and open the Search Console Links report for Google's own view. Between those two you have everything you need to act.

How many referring domains do I need?

Check the sites currently ranking for your three most valuable queries and read their referring domain counts in the checker. That range is your target, and the shape of the profile matters more than the count.

Should I disavow the odd spam link?

Leave them alone in normal circumstances. Google ignores most low quality links by default, and the disavow file is for the specific case of a manual action or a profile you know was built by paid link buying. Spend the time on earning links instead.

Reading the backlink report from the other side

The free checker tells you who links to a site. An assistant never shows that list. When it recommends a business it works from what pages say and how often a name sits near the topic. So a profile can look thin in the checker and still be quoted, or look strong and go unnamed. The report is evidence about links, not a view of the answer.

AI Knows Us records the assistant side, meaning which businesses are named and which pages support them, so the two readings can be compared for the same domain.