Should You Disavow Links in 2026? Google’s Rules, File Format & When to Leave Links Alone

Short answer (updated September 2026): Most websites should not use Google’s Disavow Links tool. Google’s own Search Console documentation says you should disavow backlinks only if (1) you have a considerable number of spammy, artificial, or low-quality links pointing to your site and (2) those links have caused, or are likely to cause, a manual action. Since Penguin 4.0 (2016) and the later rollout of SpamBrain, Google’s AI-based spam system, Google devalues most spam links automatically instead of penalizing the site they point to. Disavowing links you don’t need to can remove real ranking value, which is exactly what Google’s John Mueller warned about when a site lost traffic after its agency mass-disavowed product links that were no longer relevant.

By Dalton Grant, Linking Director at SEO Inc. Our team has removed more than 20 Google manual penalties for clients and has been auditing backlink profiles since the tool launched in 2012. Last updated: September 25, 2026.

What Is Disavowing in SEO?

Disavowing is the act of telling Google, “Please don’t count these backlinks when you evaluate my website.” You do it by uploading a plain text file of URLs and domains to the Disavow Links tool inside Google Search Console. Google does not delete anything. The links still exist on other people’s websites, and they will still show up in Search Console’s Links report and in third-party tools. Google simply treats them as if they carried no signal toward your site.

The word itself means to deny any connection to something. That’s the right mental model: a disavow file is a formal statement that you did not ask for these links and don’t want to be judged by them.

Why Google’s Advice Changed: A Short History

If you learned link cleanup before 2016, much of what you learned is out of date. Here is how we got here.

• 2012, Penguin and the Disavow tool. Google’s Penguin update began demoting whole sites for manipulative link building. Sites that couldn’t get bad links removed needed a way out, so Google released the Disavow tool in October 2012.
• 2016, Penguin 4.0 goes real time. Penguin became part of Google’s core algorithm and shifted from demoting sites to devaluing individual spam links. Instead of punishing you for a bad link, Google mostly just stops counting it.
• 2018 onward, SpamBrain. Google’s machine-learning spam system got better at spotting paid links, link networks, and sites built to pass PageRank, and neutralizing them automatically. Google’s link spam updates have continued to expand what it catches.
• Today. Google’s documentation states plainly that in most cases it can assess which links to trust without extra guidance, so most sites will never need the tool. It also warns that the feature can harm your site’s performance if used incorrectly.

The practical result: disavowing moved from routine hygiene to an emergency tool for manual actions and clear, self-inflicted link schemes.

What Google’s John Mueller Said, and Why It Still Matters

This article originally covered a Google Webmaster Hangout where a site owner described an eCommerce store whose rankings and traffic fell after its SEO agency disavowed a large number of links. The links pointed to products the store no longer sold. The owner asked whether he should undo it.

Mueller’s answer was yes. He explained that ordinary site maintenance, like changing your product line or rewriting pages, is not a reason to disavow backlinks. Disavowing, he said, is mostly for cases where problematic links are pointing to your pages. Mueller has repeated the same message many times since: the disavow file is not part of normal site maintenance, and he would really only use it if you have a manual action.

That guidance has only gotten stronger with time. Here are the three lessons we still teach every client.

1. Problematic links are the only priority

It’s tempting to treat the disavow tool like a vacuum cleaner. Upload a big list, clear out anything that looks odd, and expect rankings to rise. In reality, unrelated is not the same as harmful. A link from a legitimate site that has nothing to do with your industry is not a problem. Google says so, and it will usually just give that link little weight.

What deserves attention are links you or a past vendor built to manipulate rankings: paid links that pass PageRank, private blog networks, large-scale article or guest post schemes with keyword-rich anchors, link exchanges, and automated comment or forum spam at scale. Those are the patterns that lead to a manual action for “Unnatural links to your site.”

2. Your business can change without throwing away link equity

Companies pivot. eCommerce stores drop product lines. Agencies retire services. When that happens, many older backlinks will point to topics you no longer focus on. That is normal, and Google expects it. Those links built your site’s authority over years, and removing them from consideration throws that value away. The better move is to redirect retired product or service URLs with a 301 to the closest relevant page so the equity keeps flowing.

3. Watch your earned links as closely as your bad ones

Google’s help page asks you to be confident that links are causing issues before you disavow them. That requires actually reviewing your backlink profile, not trusting a single automated score. The best-case outcome of an overly aggressive disavow file is no change. The worst case is that you tell Google to ignore real editorial links, press coverage, and partner links that were helping you rank.

When Should You Disavow Links in 2026?

Use this checklist. If you can’t answer yes to at least one of the first two, you almost certainly don’t need a disavow file.

1. You have a manual action. Search Console’s Manual actions report shows “Unnatural links to your site.” This is the primary use case.
2. You built or bought links that violate Google’s spam policies (paid links, link networks, large-scale exchanges), you can’t get them removed, and you believe a manual review is likely.
3. A clear, large-scale negative SEO pattern is aimed at your site, recent, obviously manipulative, and big enough that a reviewer could mistake it for your own scheme. This is rare, and most spam blasts are ignored automatically.

When You Should Not Disavow Links

• Your SEO tool shows a high “toxic” or “spam” score. Those are third-party estimates, not Google signals.
• You see random links from foreign-language sites, scraper sites, or link directories you never asked for. Google ignores most of these on its own.
• Links point to products or services you no longer offer.
• Links already carry rel="nofollow", rel="sponsored", or rel="ugc". Google treats those as hints and generally doesn’t pass ranking credit through them.
• Rankings dropped and you’re looking for a cause. Algorithm updates, content quality, and technical issues are far more common explanations than backlinks.

How to Disavow Links in Google Search Console: Step by Step

1. Confirm the problem. Check the Manual actions report in Search Console. If there’s no manual action and no link scheme in your history, stop here.
2. Export your links. Download your backlinks from Search Console’s Links report, then add data from tools such as Ahrefs or Semrush for broader coverage.
3. Review links manually. Open the linking pages. Flag only links that are clearly unnatural: paid, networked, or part of a scheme.
4. Try removal first. Google recommends asking site owners to remove bad links. Keep records of your outreach, which helps with reconsideration requests.
5. Build your file. One URL or domain: entry per line, saved as a UTF-8 .txt file. Use domain-level entries for sites that are spam throughout.
6. Upload it. Go to the Disavow Links tool, choose the correct URL-prefix property, and upload. If your file has errors, Google shows them immediately and keeps your old list.
7. Submit a reconsideration request if you had a manual action, explaining what you removed, what you disavowed, and how you’ll prevent it from happening again.
8. Wait and monitor. Processing can take a few weeks. Track rankings, the Manual actions report, and new links.

Example disavow file

# Disavow file for https://www.example.com
# Updated 2026-09-25 after manual action review

# Paid links from a vendor we used in 2019 (removal requests sent, no reply)
https://blog.paidlinks.example/best-widgets-2019/
https://news.linkseller.example/sponsored-widget-review/

# Private blog network, spam site-wide
domain:pbn-network-one.example
domain:pbn-network-two.example

How to Disavow Links in Ahrefs and Semrush (and What That Actually Does)

This is the most-searched disavow question, and it causes a lot of confusion. Ahrefs and Semrush both let you mark backlinks or domains as disavowed inside their tools and export a formatted disavow file. Marking a link as disavowed in Ahrefs or Semrush does nothing in Google on its own. It only hides or tags those links in that tool’s reports. The disavow only takes effect after you export the .txt file and upload it to Google Search Console yourself.

Two more things to know: those tools’ toxicity scores are their own models, not Google’s, and a new upload to Search Console replaces your previous list. If you already have a disavow file, download it first and merge the lists, or you’ll accidentally cancel your old disavows.

Common Disavow Mistakes We Fix for Clients

• Disavowing by tool score alone. We regularly find legitimate editorial links, local news, and partner sites inside auto-generated disavow files.
• Overwriting an old file. Uploading a small new list silently removes a large old one.
• Wrong property. A file uploaded to the http:// property doesn’t cover the https:// property. Each needs its own upload.
• Trying to disavow a folder. Paths like example.com/articles/ are not supported. Use exact URLs or a domain: entry.
• Expecting instant results. Google has to recrawl the linking pages first, which often takes weeks.
• Disavowing instead of fixing the cause. If traffic fell after a core update, the answer is usually content, intent match, and site quality, not backlinks.

Does Disavowing Links Affect AI Search and AI Overviews?

AI Overviews and AI Mode are built on Google’s search index and ranking systems, so the same link evaluation that shapes organic results also shapes which pages Google trusts for AI answers. There is no separate disavow process for AI features. The bigger opportunity for AI visibility is earning mentions and links from sources that AI systems already cite: respected industry publications, original research, and clear, fact-dense content like the answer at the top of this page. Cleaning up a genuine link scheme protects that trust. Disavowing good links only reduces it.

Need a Second Opinion Before You Hit Submit?

Telling a bad link from a merely unusual one takes experience. SEO Inc. has been evaluating backlink profiles since 1997 and has removed more than 20 Google manual penalties for clients. If you have a manual action or you’re unsure whether your link profile is a risk, our backlink removal and link detox team will review every link by hand before anything goes into a disavow file. You can also start with a full SEO audit to find what’s really holding your rankings back.

Frequently Asked Questions About Disavowing Links

Should I disavow toxic backlinks?

Usually not. “Toxic” is a label created by SEO tools, not a Google classification. Google ignores most low-quality links automatically. Disavow only if the links are part of a scheme you were involved in or if you have a manual action for unnatural links.

Does disavowing links still work in 2026?

Yes. The Disavow Links tool is still available in Google Search Console and Google still honors it. What changed is how often you need it. For most sites, Google’s algorithms already neutralize spam links, so the tool mainly matters for manual actions.

What does disavow mean in SEO?

It means asking Google to ignore specific backlinks or entire linking domains when it evaluates your website. The links remain on the web, but Google treats them as though they pass no signals to your site.

Can disavowing links hurt my rankings?

Yes. Google warns that incorrect use can harm your performance in search. If you disavow links that were helping you, Google stops counting them and your rankings can fall, as in the eCommerce case John Mueller addressed.

How long does it take for a disavow file to work?

Google says it can take a few weeks. Google has to recrawl and reprocess the pages that link to you before the disavow takes effect, so sites with many linking pages may take longer.

How do I disavow links in Google Search Console?

Create a UTF-8 or 7-bit ASCII .txt file with one URL or domain: entry per line, open the Disavow Links tool, select your URL-prefix property, and upload the file. Domain properties are not supported.

Does disavowing in Ahrefs remove the link from Google?

No. Disavowing in Ahrefs or Semrush only affects how links appear in that tool. You must export the file and upload it to Google Search Console for Google to apply it.

Is a disavow file needed for negative SEO attacks?

Rarely. Google says it works hard to keep actions on third-party sites from hurting yours, and most spam link blasts are ignored. A targeted disavow can make sense only for a large, clearly manipulative pattern that risks a manual action.

Can I see which links I have disavowed?

Yes. Open the Disavow Links tool and select the property. Google shows a summary of disavowed pages and domains and lets you download the current file. Disavowed links still appear in the Links report.

How do I undo a disavow?

Upload a new file without the entries you want to restore, since a new upload replaces the old one, or click Cancel Disavowals to remove the entire list. Either change can take a few weeks to be processed.

What is the size limit for a disavow file?

The file can have up to 100,000 lines, including blank and comment lines, and must be no larger than 2 MB. Each URL can be up to 2,048 characters.

Should I disavow links after a Google core update?

Almost never. Core updates reassess content quality and relevance, not backlink spam. Disavowing in response to a core update drop usually doesn’t help and can remove links that were supporting your rankings.