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Check if a specific URL's HTTP response has Brotli compression enabled to analyze compression performance and optimize website speed.
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When your website loads slowly, it might be due to large data transfer sizes. This tool checks if a webpage uses the Brotli compression algorithm by sending an HTTP request with specific headers to the target URL and analyzing the Content-Encoding field in its response headers. Brotli is a lossless compression algorithm developed by Google specifically for web content transmission. It significantly reduces the transfer size of text resources like HTML, CSS, and JavaScript. The core output of this tool is a clear Brotli compression status (enabled/disabled) and related compression performance metrics.
Content-Encoding field to directly determine if the server returns br encoding, ensuring accurate results.Accept-Encoding: gzip, deflate, br header, consistent with mainstream browser behavior, to detect the server's actual support for Brotli.http:// or https:// protocol header, for example: https://www.example.com.Q: What does it mean if the result shows "Content-Encoding: gzip"?
A: This means the target webpage uses Gzip compression but has not enabled Brotli. While Gzip also compresses data, Brotli typically offers a higher compression ratio.
Q: How do I enable Brotli compression for my website?
A: You need to install and configure the corresponding Brotli module on your web server (such as Nginx or Apache). For example, with Nginx, you need to install the ngx_brotli module and enable the brotli on; directive in your configuration file. The specific steps depend on your server environment and hosting provider.
The input URL must be complete and valid. The test results are based on the HTTP response headers of a single request. Some websites may return different encodings based on the User-Agent; the result represents the status of this specific test request. This tool only checks the compression status of the main document of the input URL and does not automatically check sub-resources like CSS or JS referenced within the page.
Brotli compression works best on text content, especially code files with many repetitive strings. A typical example: a 100KB uncompressed jQuery library file might become 30KB using Gzip, but could drop to 25KB or smaller using Brotli. When configuring, note that Brotli has multiple compression levels (usually 0-11). Higher levels yield better compression ratios but consume more CPU. For dynamic content, it is recommended to strike a balance between performance and compression ratio (e.g., using levels 4-6). After enabling Brotli, ensure that your CDN provider also supports and passes through br encoding.