YouTube-Twitch Chat Swapper is a Firefox extension that replaces YouTube live chat with the corresponding Twitch chat on streams. It guesses Twitch channels, supports username overrides, saves settings per channel, offers quick platform switching, and includes dark mode.
In the Browser DevTools & extensions space, YouTube-Twitch Chat Swapper takes a focused approach. It focuses on watching YouTube streams with Twitch chat interactivity without manually switching platforms. YouTube-Twitch Chat Swapper is a consumer product aimed at viewers who watch streamers simulcast on YouTube and Twitch. YouTube-Twitch Chat Swapper costs nothing to use. It runs on the web and embeddable surfaces.
It is developed by Alfthebigheaded, and it first shipped in 2025. Among its 7 catalogued features are chat swapping, channel guessing, and username override. The interface is available in 32 languages, including Czech, German, and Greek.
Summary written by a language model from the project’s public pages.
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