37 Audits
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Content Encoding Checker

Performance Checker

Validates content compression for performance optimization

PerformanceContent
10 credits
Per check
~30 seconds
Average runtime
Active
Status

How it works

This checker validates that websites use proper content encoding (gzip, deflate, brotli) to optimize page loading performance. The checker sends HTTP request with Accept-Encoding header, analyzes Content-Encoding response header, validates compression method and configuration, and ensures proper content compression.

What this checker validates

This checker validates that websites use proper content encoding (gzip, deflate, brotli) to optimize page loading performance. It sends HTTP request with Accept-Encoding header, analyzes Content-Encoding response header, validates compression method and configuration, and ensures proper content compression.

Output Documentation

StatusConditionTest Logic
SUCCESSContent properly compressedContent-Encoding header with valid compression method
WARNINGUnknown compression methodContent-Encoding present but with unrecognized value
FAILNo content compressionContent-Encoding header missing

Risks and Considerations

Poor Performance: Uncompressed content loads slower, leading to increased bounce rates and poor user experience. Increased Costs: Larger file sizes consume more bandwidth and hosting resources. SEO Impact: Page speed affects search rankings, and uncompressed content can hurt your SEO.

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