We are happy to announce BrowserMob Proxy a new open source tool for simulating network conditions.
Some early functionality:
- It can slow down network traffic, effectively simulating what a low-bandwidth user might experience.
- It can also easily intercept certain HTTP requests (via regular expression), allowing you to mock out unexpected results, such as 500 response codes, long delays is responses, or even unexpected content.
Please visit the main page to sign up for the mailing list, we’d love to get more people involved in the project.You can also go to the Git project page, where you can check out the source code and report bugs.
We hope you find this tool useful and we would love to get your feedback and improvements.

Tom Pinckney · October 22, 2009 at 12:37 pm
This is fantastic. I’d love to be able to run my load tests simulating different speed users, having connections get dropped randomly part way through, inject error or garbage into ajax responses etc etc.
Keej · November 19, 2009 at 1:56 pm
I’d inamorata to sufficient stay with that too!