Free Backlink Checker
See which websites link to any domain, and find candidate link sources among a competitor's top linkers
How the backlink checker works
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Links from other websites are the main thing search engines use to judge how far a site can be trusted. This tool shows which sites link to a domain, using open data instead of a private crawl.
Where the data comes from
The Common Crawl project crawls billions of pages every few months and publishes which domains link to which. We read all of it, about two billion links, and keep the result for the 20 million best-linked domains.
Linking domains, not single links
The count is of different websites that link to the domain. Ten links from one site count once, which is also how search engines weigh them.
The 100 most authoritative
Linkers are listed in order of their own authority. One link from a well-known site outweighs hundreds from obscure ones.
What it cannot show
The page a link is on, the words of the link, or when it appeared. The open graph records links between whole domains only.
Why paid tools show more
Common Crawl reads a large sample of the web, not all of it. A paid index that crawls continuously knows more linking sites, especially small ones.
If your site is not found
New and small sites are usually outside the 20 million best-linked domains. That changes as other sites begin to link to yours.
Compare with a competitor to find candidate sites to ask. A site missing from your list may still link to you: we list up to 100 linkers per domain, from a sample of the web.
Check a domain's authority scoreRead the full methodology
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