Backlink Checker
Finds and analyses links from other websites pointing to a given domain or URL, revealing the strength and composition of a site's external link profile.
If you rely on total backlink counts alone without checking referring domains or link quality, you are likely to misjudge your link profile's true value and risk.
Key points
- Use a backlink checker to audit your own link profile before building new links.
- Compare backlink data from at least two tools to reduce blind spots from incomplete indexes.
- Focus on referring domains, not just total backlinks, for a clearer picture of link authority.
- Separate follow and nofollow links to understand which links may pass ranking credit.
- Include anchor text distribution in your analysis to spot over-optimisation patterns.
- Treat all backlink counts as estimates; no tool has a complete index of the web.
Five hundred links from ten sites vs. two hundred from fifty
A site with 500 backlinks from only 10 referring domains may look strong on total count, but a second site with 200 backlinks from 50 different domains often has a healthier link profile. The second site's links are more diverse, which typically signals stronger natural link authority. A backlink checker with a limited index might miss half the links from a new blog post, making the first site appear better than it really is.
Three metrics that matter more than total backlinks
- Referring domains One site linking many times is less valuable than many sites linking once. Referral domain count is a better proxy for link popularity than raw backlink volume.
- Link quality score Tools like Majestic and Moz assign trust or authority scores. A backlink from a high-authority site carries more weight than dozens from low-quality directories.
- Anchor text relevance Anchor text that matches the linked page's topic signals relevance to search engines. Overly optimised, keyword-rich anchor text can trigger a spam score check.
Three ways backlink checkers can mislead you
- Incomplete indexes No tool crawls every page on the web. Your backlink check may miss links from rarely crawled sites or from pages behind login walls, giving a false sense of emptiness.
- Count discrepancies across tools Different tools show different numbers because their crawl schedules and filtering rules vary. A backlink count from one tool should never be compared directly with another's.
- Ignoring nofollow links Nofollow links do not pass ranking credit, but they can still drive traffic and build brand visibility. A tool that lumps follow and nofollow together hides this distinction.
Four things to check before acting on a score
- Date of last crawl Backlink data ages quickly. If a tool's last crawl was months ago, the link profile you see may no longer reflect the current state of the web. Regular backlink audits should use fresh data.
- Spam score indicators Many tools flag links from spammy sites. A high spam score on a referring domain is a red flag; a spam score checker can help identify such links, and you may consider disavowing them if they harm your site.
- Link type and placement Contextual links inside content are more valuable than footer or sidebar links. A backlink checker that only reports counts without context misses this nuance.
- Google’s own data Google Search Console shows backlinks Google has indexed for your verified site. It is limited but offers a baseline you can trust more than any third-party estimate; however, it does not include a moz da checker score, so you still need third-party tools for authority metrics.
Common questions
What is the best free backlink checker?
There is no single best free tool. Google Search Console is free and accurate but limited. Moz Link Explorer and Majestic offer free tiers with capped queries.
How accurate are backlink checkers?
No tool is fully accurate. Each has its own index size and crawl frequency, so treat backlink counts as estimates, not absolute truths.
Can I use a backlink checker to spy on competitors?
Yes. Enter a competitor's domain to see their backlinks, referring domains, and anchor text. This helps you find link opportunities they have that you could pursue.
How often should I run a backlink audit?
Monthly or quarterly is typical. Run a full audit after any major site change or after a manual action notice to catch new or lost links early.
Sources
- Google Search Console Free tool showing backlinks Google has indexed for your verified site.
- Semrush Backlink Analytics Comprehensive backlink analysis with gap and authority metrics.
- Moz Link Explorer Free tier with Domain Authority and link data for competitive analysis.
- Majestic Backlink Checker Provides Trust Flow, Citation Flow, and detailed link history.