Gzip / Brotli Compression Test
Check whether a URL serves compressed (gzip or brotli) responses.
What is Gzip / Brotli Compression Test?
Compression reduces transfer size by 60-80% for text content (HTML, CSS, JS, JSON). Brotli (introduced 2015) outperforms gzip; modern servers support both and pick the best based on the Accept-Encoding header. This tool checks whether your server is configured correctly.
Frequently asked questions
Why isn't my site compressed?▼
Usually a server config issue. Apache needs mod_deflate; Nginx needs gzip_on. LiteSpeed has it on by default.
Does compression help images?▼
Marginally — images (JPEG/WebP) are already compressed. Compression mainly helps text-based content.
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