Change Music Pitch & Speed Online — Free Pitch Shifter Tool
The Online Music Pitch and Speed Changer lets you raise or lower the pitch (musical key) and adjust the playback speed (tempo) of any audio file independently — so you can slow down a solo without changing its key, or transpose a song without affecting its rhythm.
What are pitch shifting and time stretching?
Pitch shifting moves the musical key of an audio recording up or down by a set number of semitones without altering its duration. Time stretching (speed change) adjusts how fast the audio plays back without changing its pitch. Modern audio processing algorithms — such as phase-vocoder and WSOLA — make it possible to change one property while keeping the other intact, something that was impossible with simple tape-speed changes.
These two adjustments are at the heart of most professional digital audio workstations and are widely used in music production, education, and accessibility tools.
What is it used for?
- Instrument learning: Slow down a fast guitar riff or piano passage to a comfortable practice speed without the pitch dropping, so you can follow along note for note.
- Music transcription: Reduce tempo to catch every note in a complex chord progression or drum fill.
- Vocal practice & karaoke: Transpose a song into a key that suits your vocal range.
- Ear training: Shift pitch in small increments to train interval recognition.
- Accessibility: Speed up spoken-word recordings or audiobooks without the "chipmunk" effect on the speaker's voice.
- Content creation: Match the key of a backing track to a lead instrument or vocalist.
Supported input formats
The tool accepts the most common audio formats, including MP3, WAV, OGG, FLAC, AAC, M4A, WMA, OPUS, AIFF, and RA, among others. Simply upload your file, set the desired pitch shift in semitones and the speed multiplier, then download the processed result.
Frequently asked questions
Is this pitch and speed changer free to use?
Yes, the tool is completely free. No subscription, account, or software installation is required to change the pitch or speed of your audio file.
Can I change pitch and speed at the same time?
Yes. You can adjust both the pitch (in semitones) and the speed (as a multiplier) independently in a single processing step. The tool applies both changes to the output file simultaneously.
Will changing the pitch affect the playback speed, or vice versa?
No. Pitch shifting and time stretching are applied independently. Raising the pitch by 2 semitones will not speed up the audio, and slowing the tempo to 75% will not lower the key.
What happens to my uploaded audio file after processing?
Your file is processed on the server and then deleted automatically. It is not stored, shared, or used for any other purpose.
How many semitones can I shift the pitch?
The tool supports a practical range of semitone shifts suitable for most music and training use cases. Extreme shifts may introduce audible artifacts depending on the source material and the processing algorithm used.