Tuner 432
Measure the concert pitch (A4) of your music and retune it to 432 Hz, entirely in your browser.
Screenshots
Tuner 432 measures the reference pitch of recorded music and lets you retune it to another frequency, including 432 Hz. It is useful for listeners and musicians who want to inspect a recording, compare tunings or prepare an adjusted copy. Your audio is processed in the browser without being uploaded.
- Add one or several audio files supported by your browser.
- See the estimated A4 reference, its offset from 440 Hz and measurement confidence.
- Retune to your chosen frequency using a speed change or a tempo-preserving mode.
- Compare the original and converted recording with a player that keeps your position.
- Export WAV or MP3 files, with multiple results packaged together.
- Try a blind A/B comparison with scoring.
How to start: open the website and choose your audio files.
Changelog
Changelog
1.0.0 — 2026-10-12
- Added: measuring the concert pitch (A4) of audio files in the browser, with cents offset, standard-pitch label and confidence.
- Added: retuning to any target (default 432 Hz) by speed change or with tempo kept (SoundTouch), with a re-measured check.
- Added: WAV 16-bit and MP3 320 kb/s export, ZIP for several files.
- Added: original/converted player that keeps the position, and a blind A/B test with scoring.
- Added: "Why 432 Hz?" panel, System/Light/Dark theme, phone layout.