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 103,569 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

103,569

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
https://www.restaurantnews.com/dairy-queen-debuts-new-apple-pie-blizzard-pumpkin-pie-blizzard-returns/	2026-08-03
DQ® Blizzard Menu: Flavors & Blizzard of the Month \| DQ® Texas https://dqtexas.com/food/dq-blizzard/	2026-08-03
Yogeeta Bali Chakraborty : Yogita bali on wn network delivers the latest videos and editable pages for news & events, including entertainment, music, sports, science and more, sign up and share your playlists. - Mangtong https://tonmang.pages.dev/posts/yogeeta-bali-chakraborty/	2026-08-03
REVIEW: Dairy Queen Caramel Apple Pie Blizzard https://www.theimpulsivebuy.com/wordpress/2020/09/02/dairy-queen-caramel-apple-pie-blizzar…	2026-08-03
Business Banking \| Western Alliance Bank https://westernalliancebancorporation.com	2026-08-03
Alaska State Legislature https://www.akleg.gov	2026-08-03
Assainissement Île-de-France - Débouchage, Curage, Pompage \| 07 56 88 85 07 https://chevalier.pages.dev/assainissement.html	2026-08-03
Primo Plumbing LLC \| 24/7 Plumber \| Minneapolis & Twin Cities, MN https://primoplumbingllc.pages.dev/	2026-08-03

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 103,569 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.