Performance Tools

Brotli Compression Checker

Check whether a website uses Brotli, the newer and more efficient compression.

Not sure what to enter? Try an example: cloudflare.com

Free & instant No signup How to use FAQ

Enter a URL to see whether the server sends the page Brotli-compressed when the browser supports it.

What is Brotli compression?

Brotli is a compression format made by Google that usually compresses web text 15-25% better than GZIP. All modern browsers support it over HTTPS and advertise it with Accept-Encoding: br. This checker shows whether the server actually responds with Brotli.

How to check whether Brotli is enabled

Enter the domain in the box above.
Click Check Brotli.
A Content-Encoding of br means Brotli is on.
To enable it, turn on Brotli at your CDN or install the Brotli module for your web server - keep GZIP as the fallback.

Related checks

To confirm GZIP as the fallback, use the GZIP Compression Checker.
For all compression settings together, see the Compression Summary.

Brotli is supported by every modern browser and is often available as a single switch on Cloudflare or your host. Leave Gzip on as a fallback - JustChecker will show you whether your pages get faster.

Frequently Asked Questions

For text files it usually produces files 15-25% smaller at similar speed. All current browsers support it over HTTPS, with GZIP as the fallback.

Many CDNs and LiteSpeed hosting turn it on automatically. On your own server install the Brotli module for Nginx or Apache, or put a CDN in front of the site.

Keep it enabled. The server picks Brotli for browsers that ask for it and GZIP for everything else.

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