GZIP Compression Checker

Test if GZIP or Brotli compression is enabled on any website and estimate bandwidth savings.

Testing compression… (may take a moment)

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Encoding

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Compressed (KB)

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Uncompressed (KB)

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Savings

Compression Savings 0%

Why compression matters

GZIP and Brotli compression reduce the size of HTML, CSS, and JavaScript files sent over the network. This speeds up page load times, reduces bandwidth usage, and improves Core Web Vitals scores — a Google ranking factor.