Is w3.org legit?
This site is highly trusted. While there are a few minor areas for improvement, like adding structured data and social media links, its robust technical infrastructure and long, clean history make it a very reliable destination.
Nonprofit average: 81/100 · based on 19 sites
Checked: April 20, 2026 at 11:21 PM UTC
Is w3.org a scam? Here's what we found.
The website demonstrates excellent security practices with a valid and modern TLS 1.3 certificate, HSTS, and a Content Security Policy, alongside a clean record from Google Web Risk.
With over 31 years of establishment and clear WHOIS information, the identity of w3.org is well-established and transparent.
Given its extremely high Tranco rank, long domain age, and clean DNS blacklist status, w3.org possesses an impeccable online reputation.
The site provides clear contact information, but the lack of social media presence on the homepage slightly detracts from overall transparency for modern users.
The presence of both privacy policy and terms of service pages indicates a good commitment to legal compliance. However, the lack of structured data is a minor drawback.
The infrastructure is robust, featuring multiple DNS resolution points, strong email authentication with SPF and DMARC, and active name servers. The absence of a sitemap is a minor point.
Signals Detected
No structured data markup found
This is one of the most visited websites globally
This business has no Trustpilot presence — not unusual for smaller or newer companies
Valid certificate, expires in 51 days
Certificate issued by Google Trust Services
Connection uses TLS 1.3
Resolves to: 2606:4700::6812:1613, 2606:4700::6812:1713, 104.18.23.19, 104.18.22.19
Mail servers: pan.w3.org., puck.w3.org.
Domain has SPF email authentication configured
Domain has DMARC email authentication configured
DNS providers: jamie.ns.cloudflare.com., pranab.ns.cloudflare.com.
robots.txt has 112 directives
Site has custom branding and social media metadata
crt.sh returned status 429
Site enforces HTTPS via HSTS
Site has Content Security Policy configured
Web server: cloudflare
No threats detected by Google Web Risk
No sitemap found — common for smaller sites
Domain created 1994-07-06T04:00:00Z (31 years, 3 months ago)
Registered through Gandi SAS
Expires in 1171 days
DNSSEC status from WHOIS
Website is live and responding
Website appears to have contact information
Website has both privacy policy and terms of service pages
No social media links found on homepage
Not found on any DNS blacklists
Could not query Wayback Machine
Fast page load
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