Hey Product Hunt! 👋 I'm tony, creator of TestMic.Online. Super excited to share this with you today! 🎯 Why I built this: After joining countless Zoom calls with broken audio, I realized there was no quick, privacy-focused way to test your microphone. Most tools are either desktop apps (annoying to install), or sketchy websites that might record your voice. So I built TestMic.Online — a completely browser-based, privacy-first mic tester that shows you exactly what you need to know in seconds. 🔒 Privacy-first approach: Everything runs locally in your browser. Zero data upload. Zero tracking. Your audio never leaves your device. This was a non-negotiable design principle. 🛠 Tech highlights: - Built with Next.js 15 (App Router) - Web Audio API for real-time processing - Supports 11 languages out of the box - TypeScript + Tailwind CSS - Deployed on Vercel for instant global access 🌍 Multi-language from day one: I wanted this to be truly accessible globally, so I added comprehensive language support for English, Chinese (Simplified & Traditional), Spanish, French, German, Portuguese, Japanese, Korean, Italian, and Russian. 🤔 I'd love your feedback on: 1. What other metrics would you like to see? 2. Should I add browser extension support? 3. Any features you'd love to have? Try it out and let me know what you think! → testmic.online 🙏 Thanks for checking us out, and huge thanks to the PH community for the support!

TestMic.Online

Test your mic with real-time visualization — free & private

Test your mic with real-time visualization — free & private