Command-line tool

locust

brew/locust

Checked 25 Oct 2026, 21:09 UTC · Listing refreshed from Homebrew, winget, npm, Scoop and cargo; npm packages checked against OSV.dev

Scalable user load testing tool written in Python

Website

At a glance

Type

Command-line tool

Install on

Windows, macOS, Linux

Last checked

25 Oct 2026, 21:09 UTC

Install it

Windows

pipx install locust

macOS

brew install locust
pipx install locust

Linux

brew install locust
pipx install locust

Load-test "example.com" with web interface using `locustfile.py`

locust -H http://example.com

Use a different test file

locust -H http://example.com -f test_file.py

Run test without web interface, spawning 1 user a second until there are 100 users

locust -H http://example.com --headless -u 100 -r 1

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