Pitch shifter - HTML5 Video audio FX is a Chrome plugin developed by eldog that allows users to alter the pitch of audio in HTML5 videos on any webpage, including platforms like YouTube and Facebook. The plugin enables users to pitch shift audio without changing the playback rate, offering a range of creative possibilities.

With this tool, users can modify audio for various purposes, such as adjusting the voice of a youtuber, creating unique remixes, or experimenting with different audio effects. Notably, the plugin does not store any user data remotely and only activates when enabled, ensuring optimal performance without unnecessary system slowdowns.