HTTP Compression Checker
Paste response headers and check for compression headers.
Runs in your browser. Nothing is uploaded — your input is processed on this device and discarded when you close the tab.
HTTP Compression Checker
How to use this tool
- Enter your values in the fields above.
- Press Generate to see the result.
- Use Load sample to try the worked example, Copy result to copy it, or Clear to start again.
Worked example
Content-Encoding gzip is reported as compression present in the pasted headers.
What this tool does not do / Limits
This only reads headers you paste. It does not fetch a live response, measure sizes, or prove compression is applied to every resource.
Frequently asked questions
Does it test my live site?
No. It only reads the header text you paste.
What if no Content-Encoding appears?
Then no compression sign was found in that pasted text; the resource may still be uncompressed or served differently.
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