Brotli Compression Test
Request a URL with Brotli accepted and check whether the server answers with br-encoded content.
- Runs on our servers
- Free to use
About this tool
Brotli is the modern successor to gzip for web content. This test requests the URL with Accept-Encoding: br and reports whether the response came back Brotli-encoded. It is the fastest way to verify a CDN or web server setting, since browsers hide the negotiation.
See also the Gzip Compression Test and the HTTP Headers lookup for the complete response.
How to use it — quick steps
- 01
Enter the url
Type or paste the url in the field above, for example https://www.example.com/
- 02
Press "Test Brotli"
Press "Test Brotli" or Ctrl + Enter. The result appears below in a few seconds. Results can be copied.
- 03
Read the result
It appears in the dark panel under the form in a few seconds. Every block has [copy] and other actions.
Key features of this tool
External lookups
The lookup runs from our infrastructure, so you see what the public internet sees without exposing your own IP address or network.
Fast and cached
Results come back in seconds; identical lookups are cached for a few minutes to keep the service fast and responsive for everyone.
Easy to reuse
Every result block can be copied with one click or downloaded as a text file, and tables can also be saved as CSV for your reports.
Frequently asked questions
Is Brotli better than gzip?
Yes, typically 15–25% smaller for text at comparable speed, and it is supported by every modern browser over HTTPS.
Brotli is on, but the test is negative
Many servers only serve Brotli over HTTPS or for pre-compressed static files; dynamic pages may still use gzip. Test an https URL and a static .css or .js file.
Does Brotli replace gzip?
Keep both: clients that do not advertise br still get gzip.