- Link Authority: 77/100 (very strong, high confidence).
- Web graph rank: #71 of 134,979,706 domains, the top 0.001% of all domains.
- 227,599 linking domains counted in MrKeyword data.
- 144 hostnames under w3.org in the web graph.
- 4th of 38 open source and developer sites on MrKeyword's list.
What is w3.org's domain authority?
w3.org has a MrKeyword Link Authority of 77/100, a very strong score. The score comes from where w3.org sits in MrKeyword's web graph (August–October 2026): it is #71 of 134,979,706 domains by PageRank, and Link Authority places that position on a 0–100 log curve, so the strongest domain scores 100.
This is MrKeyword's own metric, not Moz DA or Ahrefs DR (how the domain authority scores differ); how Link Authority is calculated gives both formulas.
How many websites link to w3.org?
227,599 different domains link to w3.org in MrKeyword's data, counting each linking website once however many links it has. That is the number SEO tools call referring domains. The web graph also lists 144 hostnames under w3.org (subdomains such as www or blog count separately).
To see individual linking websites and anchor text, open the free backlink checker for w3.org.
Which strong websites link to w3.org?
The strongest linking domain MrKeyword's web graph shows for w3.org is googleapis.com, with a Link Authority of 100. The table lists the 10 strongest by their own score.
Strongest domains linking to w3.org
| Linking domain | Link Authority | Web graph rank |
|---|---|---|
| googleapis.com | 100 | #1 |
| instagram.com | 91 | #5 |
| gmpg.org | 88 | #9 |
| godaddy.com | 87 | #11 |
| linkedin.com | 87 | #12 |
| github.com | 86 | #15 |
| wordpress.org | 85 | #16 |
| apple.com | 84 | #20 |
| x.com | 83 | #22 |
| shopify.com | 83 | #24 |
8 of the 10 strongest linking domains have a profile on MrKeyword's list too (instagram.com, godaddy.com, linkedin.com, github.com, wordpress.org, apple.com, x.com, shopify.com). 2 of them are in w3.org's own group, open source and developer sites.
How does w3.org compare with similar websites?
w3.org is 4th of 38 open source and developer sites on MrKeyword's list by Link Authority, with 2 neighbours above it in the table below. The median Link Authority of those 38 open source and developer sites is 67, so w3.org is 10 points above it.
w3.org and its nearest peers
| Website | Link Authority | Web graph rank | Linking domains |
|---|---|---|---|
| wordpress.org | 85 | #16 | 2,780,782 |
| mozilla.org | 78 | #62 | 847,719 |
| w3.org | 77 | #71 | 227,599 |
| github.io | 77 | #78 | 464,772 |
| creativecommons.org | 76 | #98 | 297,915 |
See every profiled site on the domain authority list of popular websites, or compare your own site with any of these in the free domain authority checker.
What does a Link Authority of 77 mean?
A Link Authority of 77 is very strong: far ahead of almost every other website. Domains at this level are linked from a very wide spread of other sites; gaining more points usually takes links from other very strong domains. In plain numbers, w3.org is in the top 0.001% of the 134,979,706 domains in the web graph.
To raise your own site's score, read how to increase domain authority; for the domains at the very top, see the most-linked websites of 2026. The authority list explains why the 0–100 scale is logarithmic.
Where does w3.org's data come from?
Every number on w3.org's profile is read from MrKeyword's web graph (August–October 2026). This version uses data imported on 31 October 2026. How MrKeyword collects and labels this data.