Most sites never need Google's disavow tool. When it helps, such as after paid links or a manual action, when it does nothing, and how to build the file.
For most sites, no. Google's own help page says that "most sites will not need to use this tool", and John Mueller of Google has said several times that disavowing links a tool has flagged does nothing for you. The tool is not dead, though. It still has a job: cleaning up links you or someone you hired built in breach of Google's spam policies, when they have caused a manual action or likely will. Here is what Google says, when the tool helps, when it is a waste of time, and how to build a file that works if you do need one.
What Google says about the disavow tool
Google's Disavow links help page opens with a warning: "This is an advanced feature and should only be used with caution." It then says: "In most cases, Google can assess which links to trust without additional guidance, so most sites will not need to use this tool."
The same page gives two conditions, and both must be true before you disavow:
- you have a considerable number of spammy, artificial or low-quality links pointing to your site, and
- those links have caused a manual action, or likely will cause one.
Google has held this line since the tool launched. Its October 2012 announcement answered the question "Will most sites need to use this tool?" with "No. The vast, vast majority of sites do not need to use this tool in any way." It also said a disavow file is "a strong suggestion rather than a command", so Google may still use its own judgement.
Why most bad links don't need disavowing
Google says its own systems already work to cancel out link spam. In its December 2022 link spam update, Google said it was using SpamBrain, its AI-based spam-prevention system, "to neutralize the impact of unnatural links on search results." The post adds that SpamBrain can detect both sites buying links and sites used to pass outgoing links.
Mueller has repeated the practical side of this. Search Engine Journal reported in November 2022 that he said disavowing random links that look weird or that a tool has flagged "is not a good use of your time." In the next line he added that it changes nothing. At Search Central NYC, in remarks that Search Engine Journal reported in April 2025 he said Google has no internal notion of "toxic backlinks", that Google works hard to ignore random links, and that the disavow tool is not part of normal site maintenance, according to Search Engine Journal's report.
Third-party scores are a separate issue. When asked in May 2023 about disavowing links that fall under a certain score in a third-party tool, Mueller replied: "That seems like a terrible idea." He added that none of those metrics are things Google cares about, as Search Engine Roundtable reported. Mueller has also said Google has no internal notion of toxic backlinks, so a "toxic" rating in an SEO tool is that tool's own score, not a Google signal.
If you are worried about a competitor pointing spam at you, our look at a spam link attack that hit one site thousands of times shows what happened to its rankings, and our piece on whether links from spammy sites poison the sites they link to covers the same worry from the other side.
When you should use it
Use the disavow tool when the links are your own doing, there are a considerable number of them, and you cannot get them taken down. Mueller said to use it for situations where you paid for links and cannot get them removed afterwards. In practice that means:
- You have a manual action for unnatural links. Google's help page names this case first.
- You bought links or took part in a link scheme, and you expect a manual action. The help page covers this case too, and the fix is the same.
- A past SEO built paid or scheme links for you, and they have caused or are likely to cause a manual action. Google's 2012 announcement says the primary purpose of the tool is to help clean up if you have hired a bad SEO or made mistakes in your own link building.
In each case, Google's order of work is the same. First try to get the links removed from the other sites. Then disavow what is left. If you have a manual action, file a reconsideration request after that, so Google's team can review the site.
When you should not use it
- A tool shows a spike of "toxic" links you did not build. Mueller's advice in 2022 and 2023 was to leave these alone.
- Rankings dropped and you suspect links. A disavow file only tells Google which links to ignore, so it cannot fix content or technical problems. Look at what changed on your own site and in Google's recent updates first; our guide to telling whether a spam update was about links walks through that check.
- As routine cleanup. Mueller said in 2025 that the tool is not part of normal site maintenance.
Google's help page also warns that, used incorrectly, the tool can hurt your site's performance in search. Google's 2012 announcement warns against uploading the entire list of links to your site, since you do not want to disavow all your links.
How to build a disavow file that works
If you meet Google's two conditions, the file itself is simple. Google's help page sets the rules:
- One URL or domain per line. To disavow a whole domain, start the line with
domain:, as indomain:example.com. - The file must be a text file encoded in UTF-8 or 7-bit ASCII, with a name ending in .txt.
- The maximum size is 100,000 lines, comment and blank lines included, and 2MB.
- Lines that start with # are comments, and Google ignores them. Use them to note which owners you contacted.
- You get one list per property. Uploading a new list replaces the old one, so keep a master copy.
- The tool does not support Domain properties. If you have only a Domain property, the help page says it does not apply to you.
After upload, Google says it can take a few weeks for the list to take effect, as it recrawls and reprocesses the pages. Disavowed links still show in the Links report, so do not read that as a failed upload.
SerpCrest's Google Disavow File Generator builds a correctly formatted disavow.txt for Search Console from a list of domains or URLs. It formats the file; deciding which links belong in it is still your call.
The short version
Disavow only links you are responsible for, when they have caused or will likely cause a manual action, and only after trying to get them removed. For everything else, including random spam and tool-flagged "toxic" links, Mueller's advice is that disavowing them is not a good use of your time.
