Web

GZIP & Brotli Compression Checker

Gzip & Brotli

Compression Coverage Checker

Enter a URL to see which responses are compressed, how much bandwidth compression is saving, and where it's missing.

💡 Compression Testing Information

Requests the page and its key assets, inspects the Content-Encoding response header, and compares transferred size against uncompressed size for each resource.

Tool Features

Comprehensive compression testing with detailed analysis and optimization recommendations

Multi-Algorithm Testing

Test GZIP, Brotli, Deflate, and other compression algorithms

Per-Resource Analysis

Checks the page and its key assets for compression coverage

Size Comparison

Compare compressed vs uncompressed file sizes and savings

Performance Impact

Analyze bandwidth savings and performance benefits of compression

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