See Which Backlinks Are Worth Keeping

What is a backlink checker?

A backlink checker is a tool that reports the inbound links pointing at a website: which pages link to it, what anchor text they use, whether those links pass ranking credit, and how much authority the linking domains carry. Most run on a crawled index of the web, so what you see is that index’s view of your link profile rather than a live reading of it.

That distinction matters more than it sounds. Two checkers can disagree about your link count because they crawl at different depths and refresh on different schedules. Neither is lying; they are reporting different snapshots. What none of them does by default is answer the question most people actually have, which is not “how many links do I have” but “what are they worth, and are they still there.”

What is a backlink actually worth?

A backlink’s value is best understood as replacement cost: what it would cost to acquire an equivalent link today. Two inputs dominate that price — the authority of the referring domain, and whether the link passes ranking credit at all.

At published market rates, a dofollow link bands roughly like this:

• DR 70+ — about $900–$2,500, midpoint near $1,700
• DR 50–69 — about $400–$900, midpoint near $650
• DR 30–49 — about $150–$400, midpoint near $275
• DR 10–29 — about $50–$150, midpoint near $100

A nofollow link from the same domain is worth far less as ranking credit, but treating it as a percentage discount on the dofollow price is the wrong model. Nofollow links are bought for referral traffic and brand presence — a mention on a major outlet is real money in digital-PR terms — so they scale with authority off their own, much lower ladder, roughly $50–$500 at DR 70+ and $15–$120 in the DR 30–49 band.

What deliberately does not enter this calculation is estimated traffic. Multiplying an estimated price by an estimated traffic figure compounds two uncertainties into one confident-looking number. If you want to know what a link delivered rather than what it costs, measure it in your own analytics — that is a different question with a different, better answer.

How to check backlinks free

• Ahrefs free Backlink Checker — no account required, returns a capped sample of your strongest links with Domain Rating attached. Good for a fast read on the top of your profile; the cap means it is a sample, not an inventory.
• Moz Link Explorer — a free account gives roughly ten lookups a month with limited rows each, plus Domain Authority, Spam Score, anchor text and the follow split.
• Semrush Backlink Analytics — a small number of free requests per day against a large index, with its own Authority Score and toxicity rating.
• Google Search Console — free and uncapped, but only for a property you have verified, and it reports no authority metric at all. Useful as ground truth for what Google itself has seen linking to you.

All four answer “who links to me.” None of them answers “what is this worth,” “is it still live,” or “who actually hosts it.” Those are the three gaps the rest of this page is about.

Why backlink tools disagree about authority

Every major index publishes its own authority metric on its own scale, so some disagreement is expected. But there is a second, sharper reason worth knowing about, because it is easy to hit and hard to notice.

Some backlink APIs expose an internal ranking value — typically on a 0–1000 scale — alongside the link data. Rescaling that ranking into a 0–100 number produces something that looks exactly like an authority score and is not one. We shipped that mistake ourselves. On a live report it placed a DR 80 domain at “8” and a DR 70 domain at “3”, banded four DR 60+ referring domains as low authority, and then advised the site owner to go and find better links than the ones they already had.

Who really hosts your backlinks

A link profile that shows sixty referring domains might be sixty independent publishers, or it might be one operator running sixty domain names on a handful of servers. The domain count cannot tell those apart. Resolving each referring domain to its IP address and network operator can.

Genuine profiles spread across many distinct servers, networks and operators. Private blog networks concentrate: many names, few addresses, one operator. Links on that kind of footprint are one operator’s inventory whatever the domain count says, and they carry correlated penalty risk with it — so they belong at a small fraction of their tier value, not at full price.

Are your backlinks still live?

A backlink index reports when it last crawled a linking page. That is a claim about the index, not first-hand evidence about the link today. Links get removed, pages get rewritten, and sites get taken down between crawls — and a profile you are valuing on stale data is a profile you are overvaluing.

The only way to know is to fetch each linking page and look for the anchor pointing at you. Doing that properly means separating three outcomes that a naive checker collapses into one:

• The link is gone — the page still answers, the anchor is no longer in it. A real loss.
• The page is gone — 404 or 410. Also a real loss, and worth knowing separately, because it is not recoverable by asking.
• The page refused us — a 401, 403, or rate-limit response while still serving real browsers normally. This is not a lost link. Counting it as one manufactures a loss rate out of your own crawler being blocked.

The same pass finds the cheapest win in link building: links pointing at your own pages that no longer answer. That value is already earned and currently going nowhere, and a redirect recovers it this afternoon without anyone else’s cooperation.

How nqzai compares

The free checkers above are good at what they do. The column that separates them from what nqzai does is the last one — whether the tool puts a figure on an individual link rather than a metric on a domain.

Vendor pricing and free-tier caps verified 13 August 2026 against each vendor’s own pricing page; they change frequently, so confirm before committing to a plan.

Analysis and outreach are two different jobs

This page is about the links you already have: collecting them, pricing them, and checking they are still there. The other half of link building is earning new ones — finding sites with a demonstrated willingness to link in your category and pitching them.

If that is what you are after, the AI backlink outreach tool page covers it. The two connect naturally: a backlink gap analysis against a competitor is really an analysis question answered with an outreach output — the referring domains linking to them and not to you are, by definition, prospects that already link in your category.

Reports tell you what happened. Ask nqzai why.

A backlink checker tells you what links exist. It cannot tell you which of them are carrying your rankings, which have quietly gone, or whether more links are even the constraint. nqzai reads the link profile and your actual search performance together.

The report is still produced and saved — it rides along as the evidence for the answer, instead of being handed over in place of one. You can open it, copy it, or push it to your CMS. You just don’t have to read it to find out what changed.

Frequently asked questions