Google SEO Power Tip: You Can Block an Entire TLD's Backlinks With One Command

Table of Contents

  1. The Spam Backlink Annoyance
  2. The “Nuke-Level” Move Google Officially Confirmed
  3. How-To: Blocking an Entire TLD
  4. Risk Warning: Why Google Doesn’t Put This in the Docs
  5. Neo’s Deep Dive: Do You Really Need to Do This?
  6. Summary

Hi everyone, this is Neo

If you’ve run an independent site for a while, you’ve probably seen this: you open Google Search Console (GSC) and suddenly your backlink count explodes. Click in, and it’s all junk links from cheap domains like .xyz, .top, and .online.

These links usually come from gambling, adult, or straight-up scraper sites. We know Google’s algorithm (SpamBrain) is smart enough to auto-ignore most spammy links, but looking at all that “dirt” in your dashboard genuinely bothers anyone with a bit of OCD. And what if Google misjudges you?

Recently, Google search advocate John Mueller dropped a “hidden move” on Bluesky that isn’t even documented in the official docs: you can use the Disavow Tool to block an entire top-level domain (TLD) directly!

That means no more going domain by domain — one line of code makes every single .xyz site disappear from your backlink radar.

Today Neo is going to break down this “nuke-level” move and the risks hiding behind it.

The “Nuke-Level” Move Google Officially Confirmed

It started when someone asked John Mueller on social media: a client’s site was being hit by a flood of weird links from .xyz domains. What should they do?

Mueller’s reply was blunt (and casual):

“If you find that the vast majority of the issues are concentrated in a couple of specific TLDs, you can just block the entire TLD. The disavow file is a tool, not a religion. Most websites don’t need it, but not all websites don’t need it.”

Even veteran SEO expert Glenn Gabe was surprised, noting you can’t find this anywhere in Google’s official documentation.

Mueller’s explanation:

“Because it’s such a big hammer, I’m not sure we should put it in the documentation. But I do believe that within each TLD there are some good sites.”

In short, Google has always had this feature — it just deliberately doesn’t advertise it, for fear people will accidentally “kill” the good backlinks they worked so hard to earn.

John Mueller on Bluesky (Image source: Search Engine Journal)

How-To: Blocking an Entire TLD

If you’ve thought it through and decided to wipe out a whole suffix, the operation is actually very simple.

We all know the command to disavow a single domain: domain:spammysite.xyz

To block an entire suffix, just swap the specific domain for the suffix: domain:xyz

Step-by-step:

  1. Create a .txt file (must be UTF-8 or 7-bit ASCII encoded).
  2. Type the suffix commands you want to block, one per line. For example: 
    domain:xyz
domain:top
domain:club
  3. Log into the Google Disavow Tool (the entry point is pretty hidden, so just search for it).
  4. Select your property (website) and upload the txt file.

Once the upload succeeds, Google will treat all links from those suffixes as if they don’t exist when calculating your rankings.

Risk Warning: Why Google Doesn’t Put This in the Docs

Neo has to pour some cold water on this one. As satisfying as this feature is, it has one fatal flaw: there’s no “whitelist” exception.

As Mueller put it:

“Keep in mind that you can’t carve out specific domains if you like some.”

That means if you block domain:xyz, then every backlink you have from any site ending in .xyz stops counting — all of them.

Which brings us to the biggest risk: A lot of Web3 projects, tech startups, and even some super creative personal blogs use .xyz or .io domains. If you have partners in that space, or a high-authority .xyz media outlet has covered you, that one swing of the axe zeroes out those quality organic backlinks in an instant.

That’s why Google calls it the “Big Hammer” — when it comes down, it doesn’t discriminate.

Neo’s Deep Dive: Do You Really Need to Do This?

As an independent site operator, how should we weigh this? Here’s Neo’s advice:

1. When you shouldn’t use it:

  • Out of “tidiness”: If your traffic and rankings are perfectly fine, and it’s only that GSC’s backlink list looks messy to your eyes, don’t touch it. Google’s algorithm is mature enough to identify and ignore these junk links automatically.
  • Your industry is cutting-edge: If your audience is in tech, blockchain, or AI, tons of quality resources live on new TLDs. Absolutely do not take a blanket approach.

2. When you can use it:

  • You received a Manual Action notice: If Google emails you about a penalty for “unnatural links,” that’s when you need decisive action to clean up.
  • You’re under a negative SEO attack: If a competitor has bought tens of thousands of junk links for you, your rankings are clearly dropping as a result, and 99.9% of those links are concentrated in a few cheap suffixes.
  • A confirmed “junk suffix”: You’ve done your own audit and confirmed that in your niche, a particular suffix (like free domains .gq, .cf) could never contain a legitimate site linking to you.

3. Neo’s recommendation

For most folks running B2B or B2C brand sites, even if you need to disavow, stick to blocking one by one with domain:example.com, or extract the domain list with a tool and bulk-disavow — rather than nuking the entire TLD.

Because the internet changes fast: today .xyz might be a spam hotbed, and tomorrow a unicorn could be born on that very TLD. Saving a little cleanup time at the cost of future high-authority backlinks just isn’t worth it.

Summary

  1. Feature confirmed: Google supports the domain:suffix command (e.g. domain:xyz) to block all backlinks from an entire suffix.
  2. Hidden property: This is an undocumented hidden feature — “nuke-level” territory.
  3. Biggest flaw: No exceptions allowed. Once blocked, the good sites on that suffix get caught in the crossfire too.
  4. Operational advice: Unless it’s absolutely necessary (like a serious attack or penalty), don’t use it casually. Google’s automatic filtering is usually good enough.

One last thing from Neo: The essence of SEO is building quality content and earning quality recommendations — not playing whack-a-mole with junk links. The best attitude toward spammy backlinks is usually — “Let it go.”