Brotli Checker
What Is Brotli?
Brotli is Google's compression algorithm for the web — typically 15–25% smaller than gzip for text assets (HTML, CSS, JS). Smaller files mean faster loads, especially on mobile networks.
Should You Enable It?
Yes, if your host/CDN supports it (most do now, including Cloudflare). It compresses on the server; browsers have decoded it natively for years. If this checker says it is off, enabling it is usually a toggle with instant bandwidth savings.
How to Use the Brotli Checker
Check whether a website serves Brotli compression — the modern algorithm that shrinks text files 15–25% smaller than gzip — and confirm visitors are actually receiving those smaller transfers.
- Enter the site’s URL in the input box.
- Click Check to request the page advertising Brotli support and inspect the content-encoding of the response.
- Read the verdict — Brotli active, gzip only, or no compression — with the transfer sizes compared side by side.
Example
Checking https://example-blog.com shows content-encoding: br on its HTML — a 120 KB page arrives as roughly 24 KB. A second site shows gzip only, leaving easy bandwidth savings unclaimed.
Frequently Asked Questions
How much smaller is Brotli than gzip?
Typically 15–25% smaller on HTML, CSS, and JavaScript. On text-heavy sites that compounds into visibly faster loads, especially over slow mobile connections where every kilobyte counts.
Do all browsers support Brotli?
All modern browsers do — but only over HTTPS, which is a protocol rule rather than a whim. Servers must not serve Brotli over plain HTTP, another reason HTTPS is non-negotiable.
Why would a site skip Brotli?
Older servers and some shared hosts ship with only gzip enabled. Most CDNs can switch Brotli on with a single toggle, so the fix is often trivial.