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How to Build a Browser-Native Meeting Recorder Using HTML5 MediaRecorder API

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Developers can record Google Meet or Zoom sessions locally in the browser using the HTML5 MediaRecorder API, avoiding third-party software and upload limits. The approach combines three Web APIs — getDisplayMedia, getUserMedia, and the Web Audio API — to capture both meeting audio and microphone input simultaneously. The mixed audio and screen video tracks are merged into a single MediaStream, which MediaRecorder then encodes into a downloadable WebM file. This method requires no external server uploads, no sign-up, and imposes no recording time limits. A working implementation with sample JavaScript code has been published on DEV Community, with a live demo available via QuickWebSuite.

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