6 Best Free Backlink Checker Tools to Check Any Website’s Backlinks

A high-quality backlink profile remains one of the signals Google relies on when ranking websites in 2026. Links from authoritative, relevant sites still work as votes of trust, and they can make the difference between page one and page three.

The hard part is the routine around it: finding donors for outreach, running regular checks, and reacting to changes in time. The good news is that you don’t need a premium subscription for any of that. In this article, we review free backlink checker tools, what data each of them shows, and where their limits are, so you can pick the right one for your workflow.

Best Backlink Checker Tools

Here are the six tools we compared, including their free limits, how many backlinks they show, and what makes each one stand out:

Collaborator Free Backlink Checker

Collaborator Free Backlink Checker is a free backlink analysis tool powered by the SE Ranking database, where 58% of links get recrawled every 90 days. It lets you check the backlink profile of any website, whether yours or a competitor’s, with no account and no hidden trial.

Key Features:

• Analyzes any site at the domain, subdomain, or exact URL level
• Shows the total number of referring domains, plus the 50 strongest and 50 newest backlinks per check
• Provides Domain and Page InLink Rank, anchor text, and dofollow/nofollow attributes for each link
• Includes first/last seen dates, so you can verify a backlink is still live
• Referring domains from the Collaborator catalog highlighted in the report, along with placement prices, so you can move from analysis to acquiring links right away.

Things to Consider:

• Daily limits: 5 checks as a guest and 20 with a free account
• Each report is capped at 100 backlinks (50 strongest + 50 newest), so deep audits of large profiles will still require a premium platform

Ahrefs Free Backlink Checker

If you need a quick, authoritative evaluation, the Ahrefs Free Backlink Checker from a top data provider can help. Of course, this version cannot return millions of rows; however, you will get an accurate slice of data for a few donors. You can identify issues if, for example, a site’s DR is high, but organic traffic is zero, and the links come from spammy forums.

Key Features:

• The tool provides the core DR and UR metrics that most SEO experts rely on.
• The service shows the top hundred strongest backlinks of the target page for free.
• You gain insight into your competitors by seeing the top 5 anchor texts and the pages that receive links most frequently.
• The checker lets you understand how “alive” a site is by showing the approximate organic traffic of the donor page.

Things to Consider:

• The service has strict limitations and allows you to see only the top 100 results. If you want to get more data, you have to buy a subscription.
• The free version doesn’t support exporting data to CSV or Excel, but it works well for analyzing directly in the browser.

Moz Free Link Explorer

Yes, they are the ones who created the Domain Authority metric that practically all SEO specialists use today. By using their Moz Free Link Explorer, you get access to specific data you won’t find elsewhere.

Key Features:

• Accurate, original metrics that you can access without intermediaries.
• Spam Score analyzes donors for toxicity and shows the percentage of how spammy a link is.
• You can see not only new links but also ones you’ve recently lost.

Things to Consider:

• Registration is mandatory; you cannot use the service without creating an account first.
• The freemium version limits free search queries to 10 per month.

Semrush Backlink Analytics

This tool can be highly useful if you are launching a PR campaign, have sent out a press release, and now need to see fresh link data for a report. The functionality of Semrush Backlink Analytics includes thematic link analysis and deep audience research. By the way, you can immediately turn the data you obtain into informative charts.

Key Features:

• The service automatically identifies the niche of donor sites (e.g., Business, Tech, Health).
• You can clearly see exactly how they link to you: via text, images, forms, or frames.
• The Semrush database updates quickly, so you can see information about published links within just a few hours.
• They have their own quality evaluation algorithm that also accounts for donor traffic.

Things to Consider:

• The interface intrusively reminds you that you need to buy a premium subscription to unlock deeper reports.
• The tool has many tabs, charts, and metrics, which can be a bit overwhelming for beginners.

Ubersuggest

This service is not like typical SEO platforms. The tool was developed by marketer Neil Patel. The expert tried to make Ubersuggest as useful and understandable as possible for users. It takes complex data and uses it to build charts that anyone can read.

Key Features:

• The tool works great with visuals and can draw informative charts that let you track dynamics over a chosen period.
• You can filter results by several parameters to quickly find exactly what you are looking for.
• The service shows the authority not just of the entire domain, but of the specific page the link comes from.

Things to Consider:

• The Ubersuggest crawler finds slightly fewer links, especially for narrow or local niches, when compared to giants like Ahrefs or Semrush.
• The free version gives you only 3 checks per day.

SEO Review Tools Backlink Checker

The last item on our list isn’t just a single checker but an entire platform that gives you access to dozens of free tools for your link-building goals. It works in an interesting way. SEO Review Tools Backlink Checker pulls raw data from major platforms via API. You won’t see marketing funnels or beautiful dashboards here, but you will appreciate the simple interface and the ability to export data.

Key Features:

• You don’t need to create an account on the platform; it works without registration or authorization.
• Download the retrieved data in CSV format with one click.
• The data is sourced from authoritative platforms like Ahrefs or Semrush, so you can be confident in its relevance.

Things to Consider:

• You will have to solve a CAPTCHA before every request. This is how the service protects itself from bots.
• The tool needs time to query external APIs, so loading results sometimes takes 15-20 seconds.

Final Thought

A high-quality backlink profile isn’t built in a day, and it isn’t maintained without regular checks. Which free tool fits you best depends on what you’re actually checking. It depends on whether you need a quick snapshot of one competitor or regular audits across a dozen sites. It depends on whether you just want to see the links or do something with them. So:

• Collaborator wins on turning analysis into action: no registration is required, and websites available in the Collaborator marketplace are highlighted with their placement prices directly in the report.
• Ahrefs wins on data authority if you trust DR/UR metrics above all.
• Moz wins on original metrics like Domain Authority and Spam Score.
• Semrush wins on data freshness and niche detection.
• Ubersuggest wins on visuals and beginner-friendly reports.
• SEO Review Tools wins on simplicity and free CSV export.

Stop looking for the one perfect tool. Pick two or three that match your workflow, run the same domain through each, and compare. The right answer will become obvious after a few checks.

Guest Author