Privacy NoticeĪs of version 1.4, TwitchTest sends your settings and results to my server for analysis. Testing can take a long time, so it's best to select only regions close to you. You must not already be streaming during the test, and although TwitchTest needs your stream key, your stream will not go live. Streaming at your absolute maximum bitrate will result in lag and possible dropped frames. When setting the bitrate in your streaming program, you'll want to leave around 500kbps spare for any games and other data that may need to be sent. Some ISPs may also have poor routing or overloaded peering with Twitch which affects your maximum possible upload speed. Note that speed test sites will not give you an accurate view of your potential upload speed to Twitch, as they are designed to measure your upload as a whole, not to a single site over a single connection. You probably shouldn't change this unless you really know what you're doing! Other programs may use the system default. The default of 64k matches what OBS Studio uses. The TCP Window setting allows you to experiment with fine tuning certain TCP parameters. Servers further away from you will have a higher RTT. RTT: This is the time it took to establish the connection (Round Trip Time).

If your internet connection is below 10mbps upload, quality numbers may be lower due to your ISP discarding data. It's measured out of 100, and a quality rating of 80 or higher is recommended for a stable stream. Quality: This is a metric which tries to measure the overall stability / quality of the connection based on the rate at which data was sent and the number of re-transmitted packets. Note that TwitchTest will never go above 10mbps during testing and Twitch currently recommend a maximum of 6mbps (6000 kbps) when streaming.

Here's what the different numbers mean:īandwidth: Fairly self explanatory - this is the bandwidth TwitchTest was able to sustain to the server. Picking a server with sufficient bandwidth, low RTT and a high quality rating will ensure the best results when streaming to Twitch.Ī screenshot of the program. TwitchTest is a free, open source program that allows you to easily measure your upload speed to each Twitch server. A lightweight Windows program that performs a bandwidth test for Twitch.

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