HTTP/2 Checker
Check whether HTTP/2 is enabled
Features
Instantly determine HTTP/2 support
Automatically determine support status just by entering a URL
Check up to 10 at once
Check multiple URLs in parallel together, separated by line breaks
Display the HTTP version
Also check the HTTP version used at connection
Block private IPs
Automatically block connections to internal hosts and local IPs
How to use
Enter a URL or domain
Enter the URL or domain you want to check; for multiple, separate by line breaks, up to 10
Check with the run button
Press the run button and the server connects to each URL and determines the support status
Check the support results
Check HTTP/2 support and the HTTP version for each URL in a list
Use cases
Checking site speedup
Check whether your site already supports HTTP/2 to grasp room for improving display speed
Verifying server settings
Confirm it is enabled after changing the settings of a web server or reverse proxy
Investigating competitor sites
Check the HTTP/2 adoption status of other sites to consider your own response policy
Pre-check before migration work
Compare protocol support before and after a server migration or CDN introduction
Basic Knowledge
What is HTTP/2
HTTP/2 is an improved version of HTTP standardized in 2015. Through "multiplexing," which allows multiple files to be exchanged simultaneously over a single connection, it enables faster page displays compared to the conventional HTTP/1.1, where requests had to wait in line.
Relationship with HTTP/3
HTTP/3 is the next generation method following HTTP/2. It uses QUIC, a UDP-based protocol, instead of TCP, enabling faster connection establishment and communication over unstable networks.
Safety and Privacy
Server-side processing
Input is processed on the server; only information necessary for the inquiry is sent.
Temporary processing only
For checking HTTP/2 support, temporary processing occurs on the server, then data is discarded after results are returned.
Communications encrypted with HTTPS
All sent and received data is encrypted by TLS and cannot be read by third parties.
No transmission to third parties
Input content is not sent to external services such as ad networks or trackers.
Connects only to the target URL
It only connects to the entered URLs or domains to check support.
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RAKKOTOOLS is free to use!
Available free of charge for individuals and corporations, commercial and non-commercial use alike.No prior permission or usage application is required. Feel free to use it in various situations.
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Use in schools, work, and events
Can be used in various situations such as classes, team division, internal work, and events.
Introduction on Web, books, and SNS
Feel free to introduce it as a useful tool on web media, books, SNS, and other platforms.
Commercial use
Can be used for commercial purposes such as research, calculation, processing, and conversion in business and production.
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If using in streaming and videos
Link to RAKKOTOOLS in the description, or Mention or display that you are using RAKKOTOOLS in the stream or video.
Credit example for the description
Usage guidelinesYou are free to use it for normal purposes. However, use for purposes that violate laws, infringe on third-party rights, impose significant load on the service, or otherwise interfere with service operation is prohibited.
We do not guarantee the accuracy or completeness of information and calculation results obtained from each tool.
This notice is a translation of the original Japanese text. If there is any discrepancy between the translation and the original, the Japanese original takes precedence.