Mic Playback Lab

Mic Playback Lab is a tiny utility for testing a microphone directly in the browser. Press record, say something, stop, and immediately play back the captured audio.

Overview

The goal was to keep the loop as short as possible: no upload, no account, no extra UI. The audio stays in the browser and the same visual meter reacts while recording and during playback.

Technical Stack

• Frontend: Static HTML, CSS, and JavaScript
• Audio: MediaRecorder and Web Audio API
• Hosting: Cloudflare Workers Static Assets

Result

A focused, single-purpose tool that makes microphone checks fast and private.