432Tuner432TUNERTune your instrument to 432.
432Tuner is free on the web for live instrument tuning. Use your microphone to tune guitar, voice, bowls, strings, brass, or any live instrument against an A=432 reference.
No account, no upload, no file leaves your device. The paid plugin suite is the upgrade path for full songs, DAW sessions, and offline retuning.
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.
Bring 432Tuner into your DAW.
The web instrument tuner stays free. Buy the 432Tuner plugin suite when you want to retune full songs, podcasts, recordings, and production sessions across the locked 399-440 Hz reference range.
432Tuner plugin suite
AU · VST3 · Standalone · Mac universal
Mac universal today: Apple Silicon + Intel, macOS 10.13+, Audio Unit, VST3, and Standalone. Windows is coming soon.
Retune any audio file
Preserve pitch relationships
Fast offline processing
Works with music, podcasts, recordings
One-time purchase
Chain doctrine
FIRST in, LAST on.
Place 432Tuner at the top of your master bus chain — before EQ, compression, saturation, and limiting. Dial in your master, then add the shift at the front. Never place a pitch shift after a limiter.
Shifting the most dynamic, least-processed signal is the cleanest path — every downstream stage prints over the shift, and your limiter catches anything it produces.
The plugin watches its input and warns you when the signal looks already limited — the placement where artifacts live.
On an offline bounce the Mastering engine engages automatically: a larger analysis kernel and a render path that never splices, however long the track.
Install with eyes open
Honest distribution. Clear steps.
432Tuner is currently distributed as an unsigned Mac plugin package. The installer flow is direct, transparent, and built for producers who want the tool today.
Reference range: 399 / 414 / 432 / 440 presets, capped at 440 Hz.
Formats: AU, VST3, and Standalone app in one Mac universal package.
Unsigned now; notarized distribution can replace this flow later.
Copy the plugin files
Install the Audio Unit, VST3, and Standalone app into the standard macOS locations. Use the user Library paths for your account, or the system Library paths if you want every Mac user to see the plugin.
~/Library/Audio/Plug-Ins/Components/432Tuner.component~/Library/Audio/Plug-Ins/VST3/432Tuner.vst3/Applications/432Tuner.appClear macOS quarantine
The current build is unsigned. macOS may block it until you clear the quarantine flag. This is expected for the present distribution path.
xattr -dr com.apple.quarantine ~/Library/Audio/Plug-Ins/Components/432Tuner.componentxattr -dr com.apple.quarantine ~/Library/Audio/Plug-Ins/VST3/432Tuner.vst3xattr -dr com.apple.quarantine /Applications/432Tuner.appRescan in your DAW
Logic and GarageBand rescan on launch. Ableton, Reaper, Bitwig, Cubase, FL Studio, and most other hosts can rescan from their Plug-Ins or VST settings.
Logic: restart, or hold Ctrl+Opt at launch for a full AU rescanAbleton: Settings -> Plug-Ins -> RescanReaper: Options -> Preferences -> VST -> Re-scanThe Suite
Convert · Tune · Stream
Three tools, one reference. A4 = 432 Hz, stated as a fact.
Suite
432Tuner plugin suite
Upgrade from the free web tuner to retune whole mixes in your DAW with the High Quality polyphase engine. This page — one-time $22.32.
Tune
Free web instrument tuner
Tune guitar, strings, brass, bowls, voice, or any live instrument directly on 432tuner.com. The microphone tuner is free, accountless, and built around A4 = 432 Hz.
Free web tool
Upgrade to the plugin suite when you need DAW/offline retuning.
Stream
432Tune
Your whole library, always in 432 — upload once, stream retuned live on any device. 432tune.app
Ready to retune your session?
One-time plugin purchase. Streaming subscriptions live separately at 432tune.app.