Brotli Support Checker
Instantly test if a web server has Brotli (br) compression enabled for faster load times.
What is Brotli Compression?
Brotli is a modern data compression algorithm developed by Google. When used by web servers and supported by browsers, it can significantly reduce the size of website assets like HTML, CSS, and JavaScript files.
Smaller file sizes mean faster downloads, leading to quicker page load times, improved user experience, and potentially better SEO rankings. Brotli often provides better compression ratios than its predecessor, Gzip.
How this tool works: This tool checks if the server hosting the entered URL sends the Content-Encoding: br header when the browser indicates it accepts Brotli (Accept-Encoding: br), confirming full Brotli support.
Frequently Asked Questions
A Brotli checker is an online tool that pings a specific URL and analyzes the HTTP headers returned by the server. If the server responds with a `Content-Encoding: br` header, the tool confirms that Brotli compression is active and properly configured for that site.
Enabling Brotli compression drastically reduces the file sizes of your text-based assets (HTML, CSS, JS). This decreases bandwidth usage, speeds up page load times, improves user experience, and boosts your Core Web Vitals, which is highly beneficial for SEO.
Brotli uses a more modern compression algorithm and a larger predefined dictionary based on common web content. This allows it to achieve higher compression ratios (averaging 15-20% smaller files) compared to Gzip at similar compression and decompression speeds.
You can easily test your server using our free Brotli compression test above. Simply enter your website's URL (including https://) and click "Test Brotli." The tool will instantly query your server and report back its encoding status.
Yes, Brotli is fully supported by all modern web browsers, including Chrome, Firefox, Safari, and Edge. If an older browser that does not support Brotli visits your site, the server will automatically fall back to serving standard Gzip compression.
If our tool indicates a failure, it means your server or CDN is not configured to serve Brotli. You will need to enable the `mod_brotli` module on Apache, the `ngx_brotli` module on Nginx, or toggle the Brotli setting within your CDN dashboard (like Cloudflare).