Adjust playback speed and pitch independently for audio files
Drop audio file here or click to browse
Supports MP3, WAV, AAC, and more
Speed Control
0.5x = half speed (slower), 2.0x = double speed (faster)
Pitch Shift
-12 semitones = 1 octave lower, +12 = 1 octave higher
Common Uses
Music practice, audiobook speed, voice pitch modification
Upload your audio file and adjust the speed slider from 0.25x (quarter speed) to 2.0x (double speed) while keeping the pitch at 0 semitones. The tool uses advanced algorithms to change tempo independently from pitch, perfect for speeding up audiobooks or slowing down music for practice.
Pitch shifting changes the musical note height of audio without affecting playback speed. You can adjust pitch from -12 semitones (one octave lower) to +12 semitones (one octave higher). Each semitone is one musical half-step, so +12 doubles the frequency while -12 halves it.
Yes! You can independently control both speed and pitch. For example, you can slow down audio to 0.75x while raising pitch by +3 semitones, or speed up to 1.5x while lowering pitch by -6 semitones. This gives you complete control over time-stretching and pitch-shifting.
Common uses include: slowing down music for instrument practice and learning, speeding up audiobooks and podcasts for faster consumption, adjusting lecture speeds for studying, creating slow-motion or time-lapse audio effects, and matching audio duration to video length.
Pitch shifting is useful for: transposing music to match your vocal range or instrument tuning, creating vocal effects (chipmunk/deep voice), correcting slightly out-of-tune recordings, matching pitch between different recordings, and creating creative audio effects for music production.
The tool supports all common audio formats including MP3, WAV, AAC, OGG, FLAC, M4A, and more. Processing happens in your browser, so your files remain private and secure. The output maintains the original format and quality settings.
The tool uses high-quality time-stretching and pitch-shifting algorithms to minimize quality loss. Moderate changes (speed 0.75x-1.5x, pitch ±6 semitones) typically maintain excellent quality. Extreme changes may introduce slight artifacts, but quality remains very good for most uses.
Absolutely! All processing happens locally in your browser using client-side JavaScript. Your audio files are never uploaded to any server or transmitted anywhere. Your files remain completely private and secure on your device throughout the entire process.