AnyTool
Your files never leave your device. All processing happens locally in your browser.

How do I get a tuning reference tone or tune an instrument online?

Open AnyTool's Tuning Fork to play a precise, click-free reference tone for any note — with an adjustable A4 (432, 440, 442 or 415 Hz) so every frequency is recomputed correctly — or switch on the built-in microphone chromatic tuner that shows the detected note and how many cents sharp or flat you are. Layer notes into chords, pick instrument tuning presets, and download the tone as WAV, MP3, M4A, OGG or FLAC. Everything runs in your browser; the mic audio never leaves your device — no upload, no Flash, no sign-up.

  • Precise reference tones with adjustable A4 (432/440/442/415 Hz)
  • Built-in mic chromatic tuner showing note + cents sharp/flat
  • Chords, instrument presets and a click-free Web Audio engine
  • 100% in your browser — mic audio never leaves your device, no sign-up

What is

Tuning fork / reference tone

A tuning fork or tone generator produces a precise reference pitch (e.g. A4 = 440 Hz) for tuning instruments by ear. A chromatic tuner does the reverse — it listens through a microphone and reports the nearest note and how many cents flat or sharp the input is. A client-side tuner generates tones and analyses mic pitch in the browser with the Web Audio API, with no audio uploaded.

Audio Tools

Related terms

A4 reference432 Hzcentschromatic tunerequal temperament

How to Use the Tuning Fork and Tuner

Play a reference tone or tune an instrument in your browser.

15 secWeb browserMicrophone (optional)
  1. 1

    Pick a note and A4

    Choose a note and set the A4 reference (432/440/442/415 Hz).

  2. 2

    Play or listen

    Play the reference tone, or enable the mic tuner to see your note and cents off.

  3. 3

    Export (optional)

    Download the tone as WAV, MP3, M4A, OGG or FLAC — nothing is uploaded.

Result: A reference tone or live tuning readout

Frequently Asked Questions

Yes — A4 is adjustable (432/440/442/415 or custom) and recomputes every note.

All note and instrument-string frequencies are derived from the chosen A4 by equal temperament, so 432/442/415 stay correct — most rivals lock 440 and put 432 on a separate page.

Both — it generates tones and includes a mic chromatic tuner with cents.

A microphone tuner detects your instrument's pitch and shows the nearest note and cents off, making it a superset of pure tone generators and dedicated tuners in one page.

No — all mic analysis happens in your browser.

Pitch detection runs locally with the Web Audio API; the mic audio never leaves your device, and you can download reference tones as WAV/MP3/M4A/OGG/FLAC.

Detailed Explanation

Methodology

How the Tuning Fork and Tuner Work

AnyTool generates tones and tunes instruments entirely in the browser with the Web Audio API. One persistent AudioContext drives a pool of OscillatorNodes through per-note gain (with short attack/release ramps for click-free play), so notes and chords sound instantly; every frequency is computed from the chosen A4 by equal temperament (f = A4 × 2^((n-69)/12)), keeping 432/440/442/415 Hz correct. The mic tuner takes getUserMedia input into an AnalyserNode and runs the McLeod Pitch Method each frame, gated by a clarity score, to show the nearest note and cents on a needle/strobe meter — all locally, with no audio uploaded. Reference tones are rendered with an OfflineAudioContext and exported as WAV via Web Audio encodeWav, or MP3/M4A/OGG/FLAC through a self-hosted single-threaded ffmpeg.wasm engine (bundled core, no CDN).

  • Runs client-side — tones and mic analysis stay on the device
  • Persistent Web Audio engine with click-free envelopes
  • Adjustable A4 (432/440/442/415 Hz) via equal temperament
  • Mic chromatic tuner (McLeod Pitch Method) showing note + cents
  • Self-hosted ffmpeg core (bundled) — no CDN
  • Export reference tones as WAV/MP3/M4A/OGG/FLAC
Privacy & Security

Privacy and Reliability vs Legacy Tools

OnlineTuningFork.com requires dead Flash and Get-Tuned relies on a defunct Java applet, while many tone generators lock A4 to 440 and most tuners are detection-only with no export. AnyTool runs on modern Web Audio with no plugins; the mic audio never leaves the browser, there is no sign-up or length cap, and it is both a tone generator and a chromatic tuner in one page — with adjustable A4 and downloadable reference tones that the namesake competitors lack.

Tuning tools: AnyTool vs typical tools
CapabilityAnyToolTypical tools
Data handlingIn your browserVaries
Adjustable A4432/440/442/415 HzOften 440 only
Generator + tunerBothUsually one
Tone exportWAV/MP3/M4A/OGG/FLACRare
Plugins requiredNoneSome need Flash/Java

AnyTool is a privacy-first client-side tuner — tone generation and mic analysis run locally and nothing is uploaded.