Free Backlink Checker

Yes. The tool runs without a signup, account, or credit card. The free tier allows 10 unique domain checks per day per browser, which covers most use cases (auditing your own site, scouting two or three competitors, qualifying a few outreach targets). The 10-domain cap exists to keep the service available for everyone and to prevent automated scraping. After the daily limit, the tool prompts you with an upgrade option for unlimited checks. There are no email walls, no "free trial" credit-card capture, and no paid plans hidden behind a free badge. If you check the same domain twice in one day, the second check does not count against the cap (results are cached for 24 hours per domain). For most marketers and SEO consultants, the free tier covers a normal workday of research without ever hitting the limit.

Authority Score is a directional metric, not a Google ranking. It is calibrated against patterns in the open web link graph and updated continuously as new crawl data arrives. The number correlates strongly with rankings (a domain at 70 ranks for more keywords than one at 30, on average), but it is not a guarantee that a higher score will outrank a lower one for any specific query. Treat the score the way you treat blood pressure: a reliable signal of overall health, not a prediction of any single outcome. For competitor comparison, the score is most useful when you compare relative positions ("we are at 25, they are at 60, the gap is X") rather than absolute numbers. For tracking progress, the trend over 30 to 90 days matters more than any single check. New domains under 100 referring domains can fluctuate by 5 to 10 points week to week, which is normal noise rather than meaningful change.

Paid tools like Ahrefs, Semrush, and Moz crawl the web independently and maintain proprietary link indexes that include billions of URLs and detailed historical change logs. They cost $99 to $500+ per month and are aimed at SEO professionals who need deep historical data, lost-link alerts, anchor-text distribution, and campaign-level link tracking. This free backlink checker uses a continuously updated open-web index and reports the same core metrics (referring domains, Authority Score, top backlink list) without the depth, history, or alerting features. For 80% of one-off checks (auditing your own site, qualifying a guest-post target, comparing two competitors), the free tool gives you the answer you need. For ongoing campaign tracking with weekly reports and lost-link alerts, a paid tool is worth the spend. Our writeup on Moz alternatives covers the better-priced paid options if you outgrow the free tier.

Yes, that is one of the most common uses for the tool. Paste any competitor's domain, get their Authority Score, total referring domains, and top 50 link sources. The data is the same the competitor would see if they ran the check on their own domain. Cross-reference three or four competitors in the same space and you can build a pre-qualified outreach list: every domain that links to a competitor in your industry is a domain that has already proven willing to link to a similar product. The free tier's 10-checks-per-day cap covers most competitor-research workflows. For a 10-competitor analysis, spread the checks across two or three days. Pair the data with our breakdown of affordable link building services when you are ready to start outreach.

The underlying link index updates continuously as new crawl data arrives. Most domains see their referring-domain counts refresh every 7 to 14 days, with high-traffic sites updating more frequently. The Authority Score recalculates on the same cadence. If you check a domain today and again in two weeks, expect a small variation even with no real link changes (this reflects normal index refreshes, not score volatility). For a meaningful trend, compare scores 30 to 90 days apart rather than week-to-week. New domains with very recent inbound links may show "not yet indexed" for a few days while the crawl catches up.

The right number depends on your niche, competitors, and goals. A local service business in a small market can rank with 50 referring domains. A national SaaS competing against established players needs 500 to 5,000+. A media site competing for top positions on broad informational queries needs 10,000+. The better question is: how many referring domains do the sites currently ranking on page 1 for your target keyword have? Run the free checker on the top 5 results for your main keyword. The median referring-domain count of those 5 sites is your benchmark. If your domain has 30% of the median, you have a clear link-building backlog. Track progress monthly until you cross 60% of the median. At that point on-page optimization usually moves you into top 5 contention.

Yes, but less than dofollow links. Google publicly stated in 2019 that nofollow became a "hint" rather than a strict directive, meaning the algorithm now considers nofollow links as soft signals of relevance and trust rather than ignoring them entirely. A nofollow link from a high-authority publication (Forbes, TechCrunch, Wikipedia) still passes value, including referral traffic and brand mentions Google's natural-language models pick up. The Authority Score in this tool weights dofollow links higher than nofollow, but counts both. Sponsored links (rel="sponsored") and user-generated content (rel="ugc") are treated similarly to nofollow. The practical takeaway: pursue any high-quality link, but a dofollow placement is worth roughly 3 to 5x more than the same link with a nofollow attribute.

For most B2B SaaS startups, anything above 25 puts you ahead of the median competitor in your space. Above 40 starts opening up rankings on competitive informational keywords. Above 60 lets you compete for buyer-intent queries against established players. Above 80 is the territory of category-leading domains and major media. The score is most useful relative to your direct competitors. Run the free check on the 3 sites you most want to outrank. If their average score is 45 and yours is 22, your goal is to close the gap to under 10 points before expecting to rank above them on competitive queries. Below 15 means your domain has very few signals to work with and your first priority should be earning the first 50 referring domains rather than optimizing on-page content.

The free version of this tool shows the referring domain, link count from that domain, and traffic estimate. Detailed anchor-text breakdowns (the actual words used in the link text) are part of the paid tier. Anchor text matters because Google uses it as a relevance signal: if 200 sites link to your "free backlink checker" tool with the anchor "free backlink checker," that exact-match anchor distribution boosts your ranking for the target keyword. For a quick anchor sample, click through to a few of the top referring domains in the results table and inspect the actual link in their HTML. For a full anchor-text audit, paid tools like Ahrefs or our paid plan provide it.

No. Google maintains its own proprietary link graph that is several times larger than any public crawl. The free backlink checker uses an open-web index (built primarily on Common Crawl data and supplemented with our own crawls) that captures most high-traffic public links but misses some pages Google sees. The Authority Score correlates with Google rankings (a domain Google scores highly tends to score highly here), but the underlying link counts will differ. Use this tool to spot trends, qualify outreach prospects, and benchmark against competitors. For ground-truth backlink data on your own site, supplement with Google Search Console's Links report, which shows what Google actually has on file.

Google needs to discover the link, recrawl the linking page, and reprocess your domain's link profile before any ranking change happens. Discovery takes 1 to 30 days depending on how often Google crawls the linking site. Recrawl and reprocess add another 1 to 14 days. So a single new backlink typically shows ranking impact 2 to 6 weeks after it goes live. The exception is links from high-traffic, frequently-crawled sites (major news sites, Wikipedia, top blogs in your space), which can move rankings within a week. The Authority Score in this tool updates on the index's refresh cycle (7 to 14 days). If you placed new links and want to see them reflected, give the index two weeks before re-checking. For monitoring real-time placement, check the linking page directly with a website metadata checker to confirm the link is live and indexed.

The free version reports domain-level data: total backlinks to the entire domain, total referring domains, and top referring sources for the whole site. Page-level reports (backlinks pointing to a specific URL like /blog/specific-post/) are part of the paid tier. For most strategic decisions (evaluating a competitor, benchmarking your domain, qualifying an outreach target), domain-level data is what you need. Page-level data matters when you are tracking the link velocity of one specific high-priority piece of content (a launch page, a viral blog post, a category page) or when you need to spot which of your pages a competitor is linking to.

A backlink is a single hyperlink pointing at your site. A referring domain is the unique website that link comes from. If bigblog.com links to your homepage three times (in three different posts), that counts as 3 backlinks but 1 referring domain. The number that matters for SEO is referring domains, not raw backlink count. 50 backlinks from 50 different domains is far stronger than 5,000 backlinks from one domain. This is also why footer or sidebar "site-wide" links (the same link repeated on every page of one site) are weighted as a single referring domain by both this tool and Google. When evaluating link-building progress, track unique referring domains as your headline metric.

Disavow only when you have evidence that toxic links are actively hurting your rankings (a manual penalty from Google, or a clear ranking drop you can correlate with a spam-link surge). For most sites, Google's algorithms automatically discount low-quality links and disavow files do nothing. The free backlink checker shows your top 50 referring domains by traffic, which is the strong half of your link profile. To audit the long tail for spam, you need a paid tool with a full link export or Google Search Console's Links report. If you do find a clear pattern of low-quality links you cannot remove (negative SEO attack, leftover SEO agency damage), the disavow file goes through Google Search Console. For a deeper read on which link types help vs. hurt, our guide on types of links every SEO should know breaks down the categories.

Every backlink tool maintains its own crawl index. No two indexes overlap completely, which is why Ahrefs, Semrush, Moz, and this free checker all return slightly different counts for the same domain. The differences are usually 10% to 30%. Larger gaps appear when one tool indexes a region or language better than another (Ahrefs is strong on global English, Semrush is strong on European languages, smaller tools focus on different slices). For a single domain, expect numbers to differ but trend lines to agree: if Ahrefs shows your referring domains climbing month-over-month, this tool will show the same trend. Pick one tool for ongoing tracking and stick with it. Switching tools mid-campaign creates phantom score changes that come from index differences, not real link movement.

Yes. The tool only queries publicly available link data. Competitors cannot see who checked their backlinks, the same way they cannot see who Googles their company name. The check leaves no trace on the target site and consumes no resources from the competitor's servers. This is the standard model for every backlink tool: the data is collected from public crawls of the open web, not from the target site itself. Run as many competitor checks as you need within the daily 10-check cap. For ongoing competitive monitoring across more than 10 competitors, look at the paid plan or rotate browsers/days for the free tier.