HTTP Protocol Checker

Paste a response first line and identify its HTTP version.

Runs in your browser. Nothing is uploaded — your input is processed on this device and discarded when you close the tab.

HTTP Protocol Checker

How to use this tool

  1. Enter your values in the fields above.
  2. Press Generate to see the result.
  3. Use Load sample to try the worked example, Copy result to copy it, or Clear to start again.

Worked example

HTTP/2 200 is reported as HTTP version 2 with a 200 status.

What this tool does not do / Limits

This only reads the line you paste. It does not connect to any server or negotiate a real protocol version.

Frequently asked questions

Does it test my live server?

No. It only reads the first line you paste.

Is HTTP/1.1 bad?

Not necessarily, but newer versions can be faster; the result notes the version found.

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