Does Pitch / Hz Viewer upload my data?

Microphone audio stays in your browser and is never uploaded.

How do I use Pitch / Hz Viewer?

1. Click Start listening and allow microphone access. 2. Play or sing a steady note. 3. Read the note name and cents meter (negative = flat, positive = sharp). 4. Click Stop listening when finished.

What are common mistakes with Pitch / Hz Viewer?

Denying microphone permission (the tool cannot measure pitch without it). Using it in a noisy room, which makes detection jumpy. Expecting perfect accuracy on very quiet, very low, or very distorted signals.

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Pitch / Hz Viewer

Use your microphone to see pitch (Hz), note name, and cents in real time. Tune instruments or practice singing, locally in your browser.

Microphone is off

Audio is processed locally. No data is sent to any server.

Pitch / Hz Viewer: Guide

Intent: Use this pitch detector online to tune instruments: see Hz, note name, and cents in real time from your microphone input.
What it does: Analyzes microphone audio with autocorrelation to estimate frequency and display the closest note and cents offset.
Key features: Real-time Hz + note, Cents meter, Local-only mic processing
Privacy: Microphone audio stays in your browser and is never uploaded.
Best for: Quick tuning checks for guitar, violin, bass, and vocals
Intonation practice when you want Hz + cents feedback (not just a needle)
Anyone searching 'pitch detector Hz' or 'tuner online'
Why this tool: Shows Hz, note, and cents so you can correct pitch precisely
Local microphone processing: no recordings uploaded
Fast for quick checks without installing an app