432You — Tune what's live. Align what's yours.

Convert audio you own from A=440 to A=432. Or tune live, free.

01 / Convert

Convert your recording.

Upload audio you own. Download it retuned from A=440 to A=432. Your first track is free.

Your upload is kept for delivery, then removed automatically after 24 hours.

Upload your recording440 → 432 Hz

Drag & drop your song here

or tap to browse — mp3, wav, flac, aiff, m4a · up to 100 MB

I own this recording or have the right to process it. 432You converts the file, stores it for 24 hours so I can download it, then deletes it.

02 / Tune live

Tune an instrument against A=432 using your microphone. One note at a time, right here.

No account. Microphone audio stays on your device.

A = 432 Hz

Detected note

—

Play one note at a time

FlatIn tuneSharp

Start the tuner to listen

Signal

Auto, or choose a guitar string

Microphone audio stays on your device.

03 / Listen

Switch the reference on a preview track and hear the difference.

Preview player

432 Hz reference

Rise

King Bau

0:00--:--

Tracks to try

Switch between 432 and 440 while you listen.