How it works

  1. Drop your audio file. MP3, WAV, FLAC, AIFF, OGG or M4A up to 500 MB — it's decoded locally, nothing is uploaded.
  2. Pick a shift and apply. Choose anywhere from −12 to +12 semitones; the duration is preserved, so the tempo doesn't move.
  3. Listen and download. Play the transposed result on the waveform, then download it in the same format as your source file.

Features

  • ±12 semitones, tempo untouched. The duration is kept constant — a 120 BPM track stays at 120 BPM.
  • Honest about quality. Small shifts are very clean; the tool warns you when you push past ±5 semitones, where artifacts creep in.
  • Same-format export. Lossless sources stay lossless (WAV, AIFF, FLAC); lossy sources are re-encoded at high quality.
  • 100% in your browser. Your track never leaves your computer — processing runs locally with ffmpeg.wasm.

FAQ

Is this pitch shifter free?

Yes. Anonymous users get 5 free uses per day across AudioKit's free tools — no account needed. A use is only counted when you apply a shift; loading and listening is free. AudioKit Premium removes the daily limit.

Is my audio file uploaded to a server?

No. The file is decoded, transposed and re-encoded entirely in your browser with ffmpeg.wasm and never leaves your machine. The only network call is a tiny anonymous counter that tracks your daily free quota.

Which audio formats are supported?

MP3, WAV, FLAC, AIFF, OGG and M4A files up to 500 MB. The transposed file is exported in the same format as the source: lossless stays lossless, lossy formats are re-encoded at high quality.

Can I change the key without changing the tempo?

Yes — that's exactly what this tool does. The pitch is shifted in semitones while the duration is kept constant, so a 120 BPM track stays at 120 BPM whether you go up 2 semitones or down 5. For the opposite (change tempo, keep pitch), use the Time stretch tool. Not sure of the key? Run the Key finder first.

Does pitch shifting degrade the audio quality?

Honestly: a little, and more as the shift grows. Shifts of ±1 to ±4 semitones sound very clean; beyond roughly ±5, a chipmunk-like or metallic color creeps in — that's inherent to this kind of processing, and the tool warns you when you cross that range. For transposing a backing track a few semitones, you'll be fine.