Server compression checker
Server compression checker inspects the Content-Encoding response header. Check whether a URL reports compression before investigating transfer efficiency.
Server compression checker: what this tool checks
Server compression checker requests a URL and inspects the Content-Encoding header returned by its server. Compression can reduce the amount of content transferred over a connection. This check helps you examine delivery settings after a hosting change, cache adjustment, or content delivery configuration update.
How to use it
- Enter the complete URL of the resource you want to inspect.
- Submit the request and review the content encoding reported.
- Test important page and asset URLs individually when their server rules differ.
Understanding your results
A nonempty encoding other than identity is reported as enabled. An absent header or identity is reported as disabled. The request advertises the encodings configured for this installation. Results describe that response, not every visitor, file type, cache variation, or location served by the website.
Frequently asked questions
Does enabled compression prove the page is fast?
No. A compressed response can still have slow server processing or heavy browser work. Use this result to investigate one part of delivery rather than treating it as a complete speed score.
Why might two URLs show different results?
HTML pages and static assets may use separate delivery paths or rules. Existing compressed file formats may also be handled differently from text resources such as stylesheets and scripts.
Continue your review
Inspect Brotli specifically with the Brotli Checker, examine additional headers using HTTP headers lookup, and compare response timing through the TTFB checker.
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