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No. 5 of 23 ·Pitch Correction Software

OpenTune

Windows · Mac

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Freedom report

Two barsScore 6.4

  • Free tierA free tier is on its own pricing page
  • Open codeNo open-source code on record
  • Runs widely2 of 6 device platforms
  • DocumentedPlans, terms and facts published

OpenTune is a free vocal pitch correction tool for macOS and Windows. It regenerates vocals with a neural vocoder while preserving formants, and offers real-time correction and formant control. For pitch editing, users can draw by hand or work with notes and anchors; automatic key detection can identify a key, with support for Chromatic, Major, Minor, Pentatonic, Dorian, Mixolydian, and Harmonic Minor scales. Per-note EQ lets users shape individual notes, and the software imports WAV, FLAC, OGG, and MP3 files. OpenTune runs as a standalone app or a VST3 plugin with ARA2 support. Its AI processing pairs FCPE pitch extraction with a PC-NSF HifiGAN vocoder through ONNX Runtime. GPU inference uses DirectML on Windows and CoreML on macOS. The interface is available in Chinese, English, Japanese, Russian, and Spanish. OpenTune is permanently free under the AGPL V3.0 license. macOS release packages are not Apple-notarized, so the first launch may display a developer verification prompt.

Who it is for

OpenTune suits vocalists, producers, and editors seeking pitch correction on macOS or Windows, either as a standalone app or within a VST3/ARA2 workflow. Its drawing, note, anchor, key-detection, and per-note EQ tools suit users who want detailed control over vocal edits.

What is good

  • Permanently free under AGPL V3.0.
  • Supports real-time correction and formant control.
  • Offers hand-drawn, note, and anchor editing.
  • Imports WAV, FLAC, OGG, and MP3.
  • Available standalone or as VST3 with ARA2.

What to know first

  • Available only for macOS and Windows.
  • macOS packages lack Apple notarization.
  • First macOS launch may prompt developer verification.

Verdict

OpenTune combines detailed pitch-editing tools with key detection and per-note EQ, and is available as a standalone app or plugin. Its free license and format support are useful, though macOS users may encounter a verification prompt on first launch.

OpenTune plans and pricing

All plans
OpenTune Free Permanently free; standalone app and VST3 plugin with ARA2 support github.com · 4 Oct 2026

Compared on pitch correction software

Free plan
Yes
Real-time correction
Yes
Formant control
Yes
Scale/key detection
Yes

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