432You
Tune what's live.
Align what's yours.
Hear your instrument against an A=432 reference for free. When it is the whole recording that needs alignment, put your own song through the 432You conversion engine.
The tuner starts belowFree
No account or subscription
Private
Microphone stays on your device
Precise
Equal temperament at A=432
Live instrument tuning
Find the center.
Play one clear note and 432You shows the nearest note, its true frequency, and exactly how far you are from the A=432 center.
Online tuner · A=432
Tune your instrument free.
Use your microphone to tune guitar, voice, bowls, strings, or any live instrument against a 432 Hz reference. No account, no upload, no file leaves your device.
Current note
Waiting for signal
Start the tuner to listen
The center line is the nearest equal-tempered note with A4 tuned to 432 Hz.
Free tuner
Tune an instrument anytime, no account required.
432 reference
Every detected note resolves against A=432 temperament.
Plugin suite path
Need 432 tuning in your DAW? Move up to the 432Tuner plugin suite.
Your song · In 432
When one note is not enough.
Upload a song, demo, voice note, or recording you own. The 432You engine preserves the relationships inside the music while moving the full recording into the 432 reference.
Files are held only for delivery, then removed automatically after 24 hours.
Drag & drop your song here
or tap to browse — mp3, wav, flac, aiff, m4a · up to 100 MB
Hear the engine
432 against 440, in real time.
The live comparison uses the same retuning approach behind your converted track.
Flip 432/440 while it plays — hear it live through the polyphase resampler.