Tempo Changer

Change speed without changing pitch – from 0.5x to 2x tempo (MP3, WAV, OGG, M4A, FLAC)

Drag & drop an audio file or click to browse

How to change tempo (without pitch shift):

  1. Select an audio file (MP3, WAV, OGG, M4A, FLAC, etc.)
  2. Adjust the "Tempo multiplier" slider in the settings panel (right) – values below 1.0 = slower, above = faster
  3. Click "Preview Tempo" to hear the effect (no file saved)
  4. Choose output format (MP3 recommended) and bitrate
  5. Click "Change Tempo & Export" – the time‑stretched audio will be created locally (pitch stays the same)
  6. Download the result with your desired tempo

All processing happens in your browser using SoundTouchJS – files never leave your device.