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MGToolbox

Pitch Detector

Analyzer100% In-Browser

Detect the fundamental frequency of a recording or hummed note — YIN algorithm, live F0 graph, nearest musical note.

Select an audio file for pitch analysis

Supports MP3, WAV, M4A, FLAC, OGG (Max 100MB) · never uploaded

100% In-Browser • Files are processed 100% locally
Zero Data Collection
Files are processed 100% locally
Instant Client-Side Speed
Zero network upload delays
Free & Unlimited
No registration or credit card needed

Detect Pitch & Musical Notes From Any Recording

Drop in a recording — a sung note, a guitar pluck, a hum — and see its fundamental frequency over time as a live graph, with the median, range, and the nearest musical note (in equal temperament, A4 = 440) including how many cents off it is.

Pitch is estimated with the YIN algorithm, the classic, widely-cited reference method from audio research — a deterministic signal-processing technique, not AI, running entirely in your browser. The first two minutes are analyzed (plenty for tuning); your audio never leaves the device.

Frequently Asked Questions

Everything you need to know about using Pitch Detector safely and efficiently.

The YIN estimator is sample-accurate enough that the note is reliable to within a few cents on a clean, single-voice recording. Very noisy input or chords (multiple notes at once) have no single fundamental to report.
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