Free Tool
Free Backlink Checker
See any website's backlink profile — domain rating, backlinks, referring domains, top-ranking keywords, and more. Like Ahrefs, but free.
Enter a domain above to check its backlink profile
What Are Backlinks and Why Do They Matter?
Backlinks are links from other websites pointing to yours. Google treats them as votes of confidence — the more reputable sites that link to your content, the more authority Google assigns to your domain, and the higher you rank. This is not theory; backlinks remain one of the top 3 ranking factors alongside content quality and search intent matching. A page with 50 referring domains from relevant, authoritative sites will almost always outrank a page with zero backlinks, even if the content quality is identical. Use this tool to check any domain's backlink profile and understand where they stand competitively.
How to Read Your Backlink Report
The report shows four key metrics. Backlinks is the total number of individual links pointing to the domain — this includes multiple links from the same site. Referring domains is the count of unique websites linking to you, which is the more important number because Google values link diversity. Organic traffic estimates how many monthly visitors the domain gets from Google search results. Ranked keywords shows how many keywords the domain appears for in Google's top 100. Together, these paint a picture of a domain's overall SEO strength. Compare your numbers to your competitors to understand the gap you need to close.
Backlink Quality vs Quantity
Not all backlinks are equal. A single link from a high-authority site like Forbes, HubSpot, or a leading industry publication can move your rankings more than 100 links from unknown blogs. When analyzing a competitor's profile, pay attention to where their links come from, not just how many they have. Domains with high referring domain counts but low authority links often rank worse than domains with fewer but higher-quality backlinks. The ideal backlink profile has a mix: a foundation of relevant niche links plus a handful of high-authority editorial mentions. For more on building links the right way, read our guide on how to build backlinks for a new website.
How Outpacer Builds Backlinks Automatically
Most backlink tools show you the data but leave you to figure out the strategy yourself. Outpacer takes a different approach: the Growth and Agency plans include access to an editorial backlink network where your published articles earn natural links from real sites in related niches. As Outpacer auto-publishes SEO content to your blog daily, those articles get distributed to network partners who can reference and link to them — building your backlink profile on the same autopilot that handles your content. No manual outreach, no guest post pitching, no link exchanges. Read more about how editorial backlink networks work.
Frequently Asked Questions
What is a backlink?
A backlink is a link from another website to yours. Search engines like Google use backlinks as a major ranking signal — the more high-quality sites that link to you, the more authoritative Google considers your site, and the higher you rank.
What is a referring domain?
A referring domain is a unique website that links to you. One referring domain can give you multiple backlinks (e.g. if they link to you from 5 different pages). Referring domain count matters more than raw backlink count because Google values link diversity — 100 links from 100 different sites is far more valuable than 100 links from 1 site.
What is domain rank and how is it calculated?
Domain rank (similar to Domain Authority or Domain Rating) is a score estimating a website's overall authority based on the quantity and quality of its backlink profile. Higher scores mean stronger authority. It considers: number of referring domains, quality of those domains, link diversity, and follow vs nofollow ratio.
How many backlinks do I need to rank?
There is no fixed number — it depends on your competition. For low-competition keywords (KD under 30), you may rank with 0-5 referring domains if your content is strong. For competitive keywords (KD 50+), you typically need 20-100+ referring domains from authoritative sites. Focus on quality over quantity: one link from a DR 70 site is worth more than 50 links from DR 10 sites.
How can I build backlinks?
The most effective backlink strategies are: (1) creating genuinely useful content that people want to reference, (2) digital PR and data-driven studies that earn news coverage, (3) guest posting on relevant industry blogs, (4) building relationships with other site owners in your niche, and (5) using editorial backlink networks like Outpacer's where your published content earns natural links from partner sites.
Is this backlink checker really free?
Yes, completely free with no signup required. You can check up to 10 domains per hour. For unlimited checks and full backlink analysis with individual link details, anchor text distribution, and historical data, upgrade to an Outpacer Pro account.