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Performance

Compression Checker

Detect Brotli/gzip/zstd transfer compression.

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ABOUT THIS CHECK

Compression Checker

Detects transfer compression on the returned HTML response.

↗WHY IT MATTERS

Compression reduces transferred bytes and can improve load time, especially on slower networks.

WHAT TO REVIEW
  • Content-Encoding
  • Brotli/gzip/zstd
  • Unexpected uncompressed HTML
  • Proxy behavior
WHAT A GOOD RESULT LOOKS LIKE

Compressible text responses are served using modern transfer compression.

Tool guide

Understand this result, common problems, fixes and verification.

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