Does using HTTP/3 mean a website is unsafe?

No. HTTP/3 is a stack component, not a verdict. ScanMalware scores the whole page — its scripts, redirects, certificates, threat-intelligence matches and behaviour — so a site using HTTP/3 can be perfectly safe or actively malicious.

How many sites using HTTP/3 has ScanMalware scanned?

HTTP/3 has been detected in 98,005 public scans on ScanMalware.com. Each scan is a real headless-browser visit, and the figure updates as new URLs are submitted.

What technologies are commonly used with HTTP/3?

There is not yet enough scan data to report reliable co-occurrence patterns for HTTP/3.

wappalyzer

HTTP/3

HTTP/3 is the latest version of the HTTP protocol, running over QUIC for faster, more resilient connections. ScanMalware records HTTP/3 support from the Alt-Svc header and negotiated connections.

HTTP/3 support indicates a modern server or CDN stack. It is a transport-layer capability and carries no direct bearing on whether a site’s content is safe.

Public scans

98,005

How ScanMalware detects HTTP/3

HTTP/3 is detected by analysing the response headers, HTML markup, JavaScript runtime and asset URLs captured when ScanMalware loads the site in a real headless browser.

From any scan you can pivot into related signals — JARM TLS fingerprints, ASN ownership and BGP routing, certificate history, JavaScript analysis and the overall security verdict — to understand not just that HTTP/3 is present, but how it is being used. Open the full search interface for HTTP/3 →

Recent public scans featuring HTTP/3

A rolling sample of recent public scans where HTTP/3 was detected. Listing a site here is not a safety judgement — open a scan to see its full verdict.

Site	Scanned
Reach Out to Warda Transport: Custom Logistics Solutions for Business Growth & Efficiency. https://transport-178.pages.dev/contact.html	2026-07-22
Is Jared Young a Solution? - by Talkin' Mets Extra Innings https://talkinmetsnog.substack.com/p/is-jared-young-a-solution	2026-07-22
Zack Wheeler — Philadelphia Phillies Starting Pitcher — Stats & Profile — RunsLeft https://runsleft.com/pitchers/zack-wheeler	2026-07-22
CAL FIRE Updates Fire Hazard Severity Zone Map - California Wildfire & Forest Resilience https://wildfiretaskforce.org/updated-fire-hazard-severity-zone-map-available-for-public-c…	2026-07-22
Map of current California wildfires - Save the Redwoods League https://www.savetheredwoods.org/resources/map-of-current-california-wildfires/	2026-07-22
https://clientes.wifipro.mx/panel/	2026-07-22
Tactical Backpack — Wholesale Packs & Bags \| VegaTactical https://vegatactical.pages.dev/products/tactical-packs-bags/tactical-backpack	2026-07-22
TargetSolutions https://www.targetsolutions.com	2026-07-22

Frequently asked questions about HTTP/3

Does using HTTP/3 mean a website is unsafe?: No. HTTP/3 is a stack component, not a verdict. ScanMalware scores the whole page — its scripts, redirects, certificates, threat-intelligence matches and behaviour — so a site using HTTP/3 can be perfectly safe or actively malicious.
How many sites using HTTP/3 has ScanMalware scanned?: HTTP/3 has been detected in 98,005 public scans on ScanMalware.com. Each scan is a real headless-browser visit, and the figure updates as new URLs are submitted.
What technologies are commonly used with HTTP/3?: There is not yet enough scan data to report reliable co-occurrence patterns for HTTP/3.

Browse all profiled technologies on the technology index, or scan a URL to see its full stack.