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HTTP/3
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Google Chrome

Google has begun supporting HTTP/3 in nightly builds. Chrome Canary is an official experimental channel that provides binaries to allow you to test new features such as HTTP/3. Nightly builds may have some stability issues that you should keep in mind when testing.

HTTP/3 is not enabled by default. Chrome must be launched with the --enable-quic --quic-version=h3-27 flags to work.

Installation

Only Chrome canaries currently support HTTP/3. To install the latest, download the installer and run it.

Running on Windows

If installed in the default location, starting Chrome with the correct flags is done by running the following commands in a command prompt:

cd C:\Users\$USER\AppData\Local\Google\Chrome SxS\Applicationchrome.exe --enable-quic --quic-version=h3-27

(Replace $USER with the name of your account on Windows.)

Running on MacOS X

If installed in the default location, starting Chrome with the correct flags is done by running the following command in a terminal:

/Applications/Google\ Chrome\ Canary.app/Contents/MacOS/Google\ Chrome\ Canary --enable-quic --quic-version=h3-27