9 Best Free Backlink Checker Tools Reviewed For 2026

Backlinks are among the strongest ranking signals for Google, even though search evaluation has shifted heavily to topical authority and user intent in recent years. Building a credible backlink profile is only half of the story. The other half...

Fransebas Fransebas
Aug 21, 2026 - 23:16
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9 Best Free Backlink Checker Tools Reviewed For 2026

Backlinks are among the strongest ranking signals for Google, even though search evaluation has shifted heavily to topical authority and user intent in recent years. Building a credible backlink profile is only half of the story. The other half is knowing what you and your competitors already have and whether any of your existing links could be doing you harm. Here’s what free backlink checker tools are here for: they enable you to check referring domains and explore new link building opportunities, at no cost.

Backlink Analysis 101: Core Metrics Explained 

A backlink report shows you a lot of useful metrics to work with – both fundamental and additional data that help you evaluate link quality more fully. Here is your quick-reference list of the key indicators you need to know to assess a site’s link health.

1. Domain Authority (DA) & Domain Rating (DR) 

Domain Authority (DA) is a 0-100 score developed by Moz, while Domain Rating (DR) is its equivalent by Ahrefs. Both give you a clue on how much search engine authority a domain carries based on its link profile. 

2. Dofollow vs. Nofollow Links

A dofollow link passes “link juice” (value) from the linking site to yours. This contributes to your rankings. A nofollow link tells search engines not to pass ranking credit along. It still has worth (for traffic and brand awareness, for example), and it’s natural for a website to have these. But when it comes to improving rankings, it usually doesn’t have the same impact as a dofollow backlink. 

3. Spam Score

This indicator was developed by Moz, but other tools have their own similar metrics. It shows how many spam-like characteristics a site shares with those penalized or banned by Google. A higher % doesn’t necessarily mean a site is toxic, but it’s a warning signal that’s worth attention anyway. 

4. Referring Domains vs. Total Backlinks

Why is it worth looking at both the number of unique websites that link to yours and the total count of all individual links? Because 100 backlinks from 100 different websites tell Google a very different story from 100 backlinks coming from just two. A diverse set of relevant and trusted referring domains is what makes up a stronger-looking link profile.

5. Anchor Text

This is the clickable text the hyperlink is attached to and you need it to be diverse. A natural and varied anchor text profile looks healthy and logical to search engines, while over-optimized exact-match anchors look unnatural and manipulative.

You don’t need an expensive subscription to audit your website’s backlink profile. With the nine tools below, you can run backlink reports for free. Here’s the short version of our recommendations for free backlink checker software: 

Collaborator Free Backlink Checker Ahrefs Backlink Checker  Semrush Free Backlink Checker Moz Link Explorer Majestic Free Backlink Checker Ubersuggest Backlink Checker SEO Review Tools Free Backlink Checker  OpenLinkProfiler Free Online Backlink Checker Seobility Free Backlink Checker Tool Collaborator Free Backlink Checker homepage with website URL input field

The Collaborator Free Backlink Checker is a no-brainer addition to your SEO workflow if you’re already using or are planning to use Collaborator for link building. It relies on SE Ranking’s index and does something no other tool on this list is capable of: domains where you may be able to earn new backlinks through the Collaborator marketplace. Here’s what you’re getting:

SE Ranking’s database is a source you can count on – 58% of links recrawled every 90 days; Total of 100 backlinks shown: 50 strongest, 50 newest; Dofollow & nofollow status; 5 checks per day without an account, 20 checks per day after free sign-up; Domain InLink Rank and Page InLink Rank for each link, along with an anchor and first and last seen dates; Websites available for guest posting through Collaborator marketplace.


Good for: link builders, SEO pros, and marketers interested in quickly identifying link building and guest posting opportunities.

Why Choose This Tool? It saves time by turning competitor research straight into link building opportunities on a single platform, without hours of manual outreach.

The Ahrefs Free Backlink Checker is great when all you need is a fast domain authority check or a quick read on who’s linking to a competitor. A free version has serious limits yet gives you a peek into industry-benchmark data.

Domain Rating (DR), which is one of the most trusted authority metrics in the SEO landscape; Data based on the most active commercial web crawler network on Earth; Total backlink count and linking websites count, with dofollow % breakdown; Up to 20 links with referring page and anchor text; No sign-up required, up to 10 lookups per day.

Good for: Getting a highly accurate authority metric on competitors or full data for your own verified websites. 

Why Choose This Tool? One of the largest and most frequently updated link indexes; Domain Rating metric has become the standard.

The Semrush Free Backlink Checker uses one of the largest backlink databases on the planet (43 trillion links) refreshed hourly. While the powerhouse behind this tool is one of the biggest names in SEO ever, the free version only provides a quick snapshot of a website’s backlink profile:

Domain Authority (DA) Score – Semrush’s proprietary metric  Total backlink count and referring domains  Dofollow percentage Just a handful of links shown with anchor text and target URL  3 checks per day, no account needed 

Good for: anyone looking to get a clear picture of a site’s overall authority.


Why Choose This Tool? The free account gives you a reliable Authority Score and a clean overview of a domain’s top backlinks. 

The Moz Link Explorer won’t give you access to the company’s complete link index, but it’s enough for giving you a quick idea how a website is performing from a link-building perspective. It’s great when you need a fast answer on whether a domain is a toxic spam risk thanks to Moz’s proprietary and highly trusted DA (Domain Authority) and Spam Score. Free info includes:

Domain Authority (DA), Page Authority (PA), Spam Score; Total linking domains, inbound links, top anchor text and follow/nofollow breakdown; Together with recently discovered links, there’s lost link tracking – useful for spotting link drops before they hurt rankings; Top Pages report is limited to 5 on the free tier;  Free account required to analyze backlinks, yet 10 searches/month are a real limitation.

Good for: people newer to SEO who want a trusted benchmark.


Why Choose This Tool? True Domain Authority (DA) metric and Spam Score from a highly authoritative source, so you can assess whether the links look safe and trustworthy.

The Majestic Free Backlink Checker is a good pick for SEO specialists who need to analyze link quality metrics over raw counts. That’s because of the ratio between Majestic’s two metrics that tell a lot about link quality at a glance: Trust Flow and Citation Flow. What’s free here:

Trust Flow – measures how closely a site’s inbound links connect to a set of seed sites that are known to be trustworthy;  Citation Flow – measures the raw volume of links; A dashboard that shows backlink history and anchor text summary with language detection; Follow & NoFollow counts; Link Profile charts.

Good for: link builders, SEOs, and digital PR specialists who care about niche relevance.


Why Choose This Tool? Trust Flow and Citation Flow let you evaluate the topical relevance of links instead of just volume.

Neil Patel’s free backlink checker runs on his own index and packs in more detail per link than most free tools, all within an easy-to-digest and visually-appealing interface. You’ll see Spam Score and Page Authority for every URL, which is exactly what you need when deciding whether to disavow a suspicious link or verifying a potential link partner. Even a no-cost version provides a wealth of information for analysis:

Up to 100 backlinks with Domain Authority, Page Authority, Spam Score, anchor text, and first/last-seen dates; Dofollow/nofollow filters; Advanced filtering by region, anchor text, domain score, and URL; Competitor gap analysis – find links your rivals have that you don’t; CSV export;  1 free search per day with no account needed is quite a serious limitation, yet manageable for targeted audits.


Good for: freelancers, bloggers, and small business owners who want a clean and simple source of data. 

Why Choose This Tool? It’s very easy to use and the reports are easy and intuitive to read.

The SEO Review Tools Free Backlink Checker is a solid find for two strong reasons. First, limit counts are generous. Second, it’s powered by reliable data from the Semrush API. You’ve guessed it right, you’re essentially getting access to Semrush’s massive backlink database and authority metrics, completely free of charge and without registration. Drop in a URL and the free SEO backlink checker tool returns this info:

100 backlinks per check sorted by Domain Authority score; Anchor text and follow & nofollow labels; Referring domains, referring IPs, and total external link count; Excel export available; Filters available; Page-level or domain-level checking.

Good for: Anyone who needs unlimited backlink checks without signing up for anything. 

Why Choose This Tool? It pulls premium-level data powered by Semrush’s Authority Score, for free.

The OpenLinkProfiler Free Online Backlink Checker is an old-school tool. Those who have been in the SEO game for a while remember the functionality that used to let you export up to 100,000 links per report. The export this massive is a thing of the past now, yet valuable data for competitor backlink analysis is still available. Registration is required to use this tool, yet in exchange, here’s what you’re getting:

Total counts for: total backlinks, broken links, referring domains & pages; Up to 100 URLs with spam indicators and toxicity signals available for analysis; Additional backlink charts – link types, attributes, platforms and page types they come from; Anchor text.

Good for: small site owners who want to get a deeply categorized breakdown of their link profile. 


Why Choose This Tool? A highly intuitive letter-grade system (like A+, A-, or B) to evaluate Domain Rank, Page Rank, and Backlink Rank. A rich visual dashboard that offers link data not supported by other tools, like the semantic location of the links.

The Seobility Free Backlink Checker shows quite a large report with up to 600 URLs per check on the free tier, with no account needed. Anyone who wants a quick visual snapshot of a backlink profile’s overall health – you need to check this tool, period. What you get free of charge: 

Domain Rating, total backlinks, referring domains as headline metrics; Link Rating – proprietary quality score; Referring page title and URL, link anchor, and target URL; Follow/nofollow and text/link type tags per backlink; 3 checks per day without registration.

Good for: DIY SEO specialists and webmasters who want a visual picture of their backlink profile without digging through spreadsheets.

Why Choose This Tool? A clear breakdown of data makes it very easy to understand your backlink health at a glance. 

We’ve put the core info – daily limits, main metrics, and features that set each of the free backlink checkers apart into one handy table so you can find the right one for your needs in a matter of minutes.

ToolFree LimitsLogin Required?Primary MetricLinks ShownStandout FeatureStarter Pricing To Expect If You Want To Upgrade
Collaborator Backlink Checker5/day (20 with account)No Domain & Page InLink RankTop 100 (50 strongest + 50 newest)Shows sites available on the Collaborator marketplace for guest posting, with prices included100% Free
AhrefsUnlimited individual URL checksNoDomain Rating (DR) & URL Rating (UR)Up to 20 of top 100 backlinksData from the industry’s most active web crawler and largest live backlink database$29/mo (Starter)
Semrush3 searches per day without login required, 10 searches per day with a free accountNo Authority Score (AS)Top 100 per queryComprehensive link profiling, Toxicity Score$139.95/mo (Pro)
Moz Link Explorer10 queries / monthYes Domain Authority (DA) & Spam ScoreTop 50 links per queryProprietary Domain Authority and Spam Score$49/mo (Starter)
MajesticA few queries per dayNoTrust Flow (TF) & Citation Flow (CF)Up to 100 linksMassive proprietary Fresh and Historic link indexes$49.99/mo (Lite)
Ubersuggest1-3 searches / dayNoDomain Score (Authority)Top 100 backlinksClean, beginner-friendly visual dashboard$12/mo (Individual)
SEO Review ToolsGenerous daily useNoSemrush Authority ScoreTop 100 most valuable backlinksBuilt-in filter restricts results to one link per domain so you can skip site-wide spam.100% Free
OpenLinkProfilerUnlimited queriesYesBacklink Rank, Page Rank, Domain RankUp to 100 linksAdditional backlink characteristics diagrams100% Free
Seobility3-5 searches / dayNo Link RatingTop backlinks overviewIntuitive visual representation of link profiles$50/mo (Premium)

Free backlink checkers give you a lot of valuable insights. Here’s a repeatable workflow that helps turn occasional spot-checks into a real off-page SEO system.

1. Run a Monthly Backlink Profile Health Check

Daily alerts are unnecessary unless you’re managing a massive enterprise site. Once a month, check this: how your referring domains trend is moving, whether you lost any high-authority links, and whether there’s been a sudden spike in low-quality links.

2. Spot and Clean Up Toxic Links

Some links are gold, others are neutral, and still others are actively pulling your rankings down. Run your domain through Moz Link Explorer and filter by Spam Score. Anything above 60-70% requires a closer look.

3. Look Up What’s Working for Your Competitors

Spotting competitor strategies applies to backlink analysis as much as it applies to other SEO practices. If a website is linking to your competitor, there’s a reasonable chance they’d link to you too, especially if your content is better. Don’t lose it!

4. Monitor Your High-Value Pages

Your homepage naturally gets the most links, but your conversion and key product pages need attention too. Check which specific subpages are picking up links. Got an excellent blog post that’s picking up lots of natural backlinks? Link from that post to your key service or sales pages and let some of that authority flow deeper into the site.

Wrapping Up

Building a healthy, diverse link profile supports long-term growth, improves your visibility in search results, and drives meaningful organic traffic. To achieve this, your link-building strategy needs to be data-driven. Use these free tools, run them in parallel, and you’ll have more than enough signals to make smart decisions.