curl -fsSL https://get.h3llo.cloud | sh

h3 --version
# h3 0.42.1 (revision 9657429, built 2026-05-04)

brew tap h3llo/tap
brew install h3

curl -fsSL https://get.h3llo.cloud/apt-key.gpg | sudo tee /etc/apt/keyrings/h3.gpg > /dev/null
echo "deb [signed-by=/etc/apt/keyrings/h3.gpg] https://get.h3llo.cloud/apt stable main" | sudo tee /etc/apt/sources.list.d/h3.list
sudo apt update && sudo apt install h3

sudo dnf config-manager --add-repo https://get.h3llo.cloud/rpm/h3.repo
sudo dnf install h3

winget install h3llo.h3