Instrument Tuner
Tune your instrument with precision using your microphone
Frequency: — Hz
| Note | Frequency (Hz) |
|---|---|
| C4 | 261.63 |
| D4 | 293.66 |
| E4 | 329.63 |
| F4 | 349.23 |
| G4 | 392.00 |
| A4 | 440.00 |
| B4 | 493.88 |
使い方
ツールを開く
セットアップ不要 — ツールはブラウザで即座に読み込まれます。
操作して探索
マウス、キーボード、またはタッチでリアルタイムに操作します。
いつでもどこでも利用可能
デスクトップとモバイルに対応 — 外出先でも練習や作成ができます。
このツールを使う理由
完全無料
隠れたコストもプレミアムプランもありません — すべての機能が無料です。
インストール不要
すべてブラウザで実行されます。ソフトウェアのダウンロードやインストールは不要です。
プライベート＆安全
データはデバイスの外に出ることはありません。サーバーにアップロードされることはありません。
モバイル対応
完全レスポンシブ対応 — スマートフォン、タブレット、デスクトップで利用できます。
How Digital Instrument Tuners Work
Key Takeaways
- Chromatic tuners detect pitch by analyzing audio frequency using Fast Fourier Transform (FFT) algorithms.
- Standard concert pitch is A4 = 440 Hz, though some orchestras tune slightly higher (441–443 Hz).
- Browser-based tuners use the Web Audio API to access your microphone and process audio in real time.
A digital instrument tuner listens to the sound your instrument produces, identifies the closest musical note, and shows how sharp or flat you are. Modern browser-based tuners leverage the Web Audio API to perform real-time pitch detection directly on your device, with no software installation required.
±1 cent
Tuning accuracy
Common Use Cases
Guitar & Bass Tuning
Quickly tune all six strings to standard (EADGBE) or alternate tunings like Drop D, Open G, or DADGAD before practice or performance.
Orchestral Warm-Up
Tune woodwind, brass, and string instruments to concert pitch A440 during ensemble warm-up without carrying a separate tuning device.
Ukulele & Mandolin
Tune less common stringed instruments accurately using a chromatic tuner that detects any pitch rather than only preset string notes.
Vocal Pitch Training
Singers can use a visual tuner as feedback to practice hitting and sustaining accurate pitches during vocal exercises.
Tips for Accurate Tuning
Tune in a quiet environment — background noise can confuse pitch detection and produce unreliable readings.
Play a single note clearly and let it sustain. Avoid strumming multiple strings simultaneously.
Tune up to pitch rather than down. If sharp, loosen below the target and tune upward for better stability.
Allow your microphone a moment to initialize. Some browsers require you to grant permission before the tuner can start.
This tuner processes all audio directly in your browser using the Web Audio API. No audio data is recorded, stored, or sent to any server. Microphone access is used solely for real-time pitch detection.