Brotli Checker

Free Brotli Checker — Test If a Site Uses Brotli Compression

This tool checks whether a website serves its text resources using the Brotli compression algorithm. Enter any URL and you'll see whether Brotli is active, or whether the site is using older Gzip or no compression at all.

Compression is one of the easiest, highest-return speed optimizations there is, and Brotli is the modern standard. Developed by Google, it typically compresses HTML, CSS and JavaScript 15–25% smaller than Gzip, which means fewer bytes over the wire and faster loads — particularly on mobile connections. Smaller transfers feed directly into faster rendering, better Core Web Vitals and lower bandwidth costs. Brotli is supported by every modern browser, so there's rarely a reason not to use it for text assets.

Use this tool to confirm Brotli is enabled on your own server, to check whether you're leaving easy savings on the table with Gzip-only or uncompressed delivery, and to verify a configuration change actually switched compression on. If the result shows no compression at all, that's a quick, high-impact fix: enabling Brotli (or at minimum Gzip) is usually a one-line server or CDN setting that instantly shrinks your text payloads.

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