Knock to Tune
Tap a glass, mug or pipe and it names the note it rang at — plus a mode that tells you how much water to pour to tune a glass to any pitch.
Mic listening isn't available here
Your browser doesn't support live microphone input (or the page isn't on HTTPS). Open this on a phone or a modern desktop browser over HTTPS to tap-and-tune any object.
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👋 Tap something!
Flick a glass, mug, table or pipe near the mic — I'll catch its ring.
Microphone blocked 🔒
Allow mic access for this site (tap the 🔒 / camera icon in your address bar), then press Start listening again.
Every object has a note
Press Start listening, then tap a glass, mug or table near your mic to hear its hidden musical pitch.
your glass
Sing a glass into tune
Pick a target note, press Start listening, then tap your glass. Add or remove water as I guide you, and re-tap until it locks in.
Lower = only loud, clean knocks. Higher = catches gentle taps (but more false triggers).
100% private — audio is analysed on your device and never uploaded.
Why you’ll love Knock to Tune
Instant & free
No signup, no paywall, no limits — Knock to Tune works the moment the page loads.
Completely private
Everything runs in your browser. Nothing you enter is ever uploaded or stored on a server.
Works on any device
Fully responsive and touch-friendly — use it on your phone, tablet or desktop.
Instant sound
Plays in real time in your browser via the Web Audio API — headphones recommended.
How to use it
Open it
No download and no login — the tool is ready right at the top of this page.
Use it
Enter your details or start interacting. Everything updates live as you go.
Get your result
Copy, download or share your result in a single tap. That’s it.
Frequently asked questions
Knock to Tune is 100% free — no signup, no watermarks and no usage limits. It’s one of 200+ free tools we build and give away.
Browsers require a single tap before playing audio. After that first tap, everything works instantly.
Completely. Knock to Tune runs entirely in your browser (client-side). Nothing you type, upload or generate is sent to our servers, so your data never leaves your device.
No. It works instantly in any modern web browser — Chrome, Safari, Edge or Firefox — on desktop and mobile. You can even install this site as an app.
Yes. The tool is fully responsive and touch-friendly, so it works great on phones and tablets as well as computers.
Workaholic Developers — a software & AI studio. We built Knock to Tune (and 200+ other free tools) to show what we can do. Need something custom built? We’d love to help.
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Knock to Tune is one of 200+ free tools from Workaholic Developers — a software & AI studio. Need a website, app, AI agent or automation? Let’s talk.
🇮🇳 Built by Workaholic Developers
We built this little toy in days. Imagine what we’ll build for you.
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