Audio Pitch & Speed Changer
Adjust pitch and speed of any audio file right in your browser.
No server upload — 100% local processing.
Drop an MP3 or WAV here, or click to select
Supported: MP3, WAV, OGG, M4A
Preview
Adjust
Processing...
About
The Audio Pitch & Speed Changer is a free browser-based tool that lets you modify the pitch (musical key) and playback speed of audio files instantly.
All processing runs entirely within your browser using the Web Audio API. Your audio files are never sent to any server, keeping your media private and secure.
Whether you're a singer adjusting karaoke keys, a musician doing transcription, or a language learner slowing down audio, this tool covers your needs.
How to Use
Select a file
Drag and drop an audio file onto the drop zone, or click it to browse and select a file from your device.
Adjust pitch & speed
Use the sliders to set pitch (-12 to +12 semitones) and speed (0.5x to 2.0x). Use preview playback to hear changes in real time.
Export as WAV
Click "Export as WAV" to render the full audio with your adjustments and save the lossless WAV file to your device.
Glossary
- Pitch
- The perceived frequency of a sound — how high or low a note sounds. Changing pitch shifts the musical key of the audio.
- Semitone
- The smallest standard interval in Western music — equivalent to one piano key step. 12 semitones make one octave.
- BPM (Beats Per Minute)
- A unit of musical tempo. Changing playback speed also changes the BPM of the audio proportionally.
- Web Audio API
- A browser-native audio processing framework that enables real-time manipulation of audio data without any server involvement.
- WAV (Waveform Audio File Format)
- An uncompressed audio format with no quality loss. Widely compatible with digital audio workstations and editing software.
- Sample Rate
- The number of audio samples captured per second. Standard CD audio is 44,100 Hz (44.1 kHz). Higher rates mean better fidelity.
FAQ
- Q.What audio formats are supported?
- MP3, WAV, OGG, M4A, and any other format your browser can decode. MP3 and WAV have the widest support.
- Q.Is my audio file sent to a server?
- No. All processing is done locally in your browser using the Web Audio API. It works completely offline too.
- Q.Can I change pitch without changing speed?
- Yes. Uncheck "Link pitch and speed together" to adjust them independently. Note that purely independent pitch shifting uses the browser's built-in detune feature.
- Q.What is the maximum file size?
- Processing happens entirely in browser memory. Files under 50 MB are recommended; larger files may take longer to convert.
- Q.Is WAV the only output format?
- Currently yes. WAV is lossless, so there is no quality loss, and it is compatible with most audio software.
- Q.Does it work on mobile?
- Yes — iOS Safari and Android Chrome are supported. Large file conversions may take a few seconds on mobile.
Use Cases
Karaoke key adjustment
Shift the key of a backing track up or down to match your vocal range for home practice sessions.
Music transcription
Slow down a challenging passage to transcribe notes accurately, or shift pitch to analyze a different register.
Language learning
Slow down a podcast or dialogue recording to catch every syllable, then speed it up as your comprehension improves.
Speeding up recordings
Review long meeting recordings or lectures at 1.5x or 2x speed to save time without missing content.
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