Audio tools
Pitch & Tempo Shifter
Free Utility
Change the key and speed of any song independently. Perfect for musicians practicing along to backing tracks, or singers adjusting a song to their vocal range.
Track
Upload File
or drop your file here
max 50 MB
No track loaded
Drop an audio file above — the pitch and tempo controls appear once there's something to shift.
Questions answered
Frequently asked questions
Yes — right now it does. The shift is applied by resampling, so raising the pitch shortens the track by the same ratio: a ten-second clip pushed up two semitones comes back at about 8.9 seconds. To hold the length, move the tempo slider the other way — roughly 0.89 for +2 semitones, 1.12 for −2 — or leave pitch at 0 and use tempo alone if all you want is to slow a passage down.
Because the pitch change is a resample, the formants move with the notes rather than staying put, which is what makes big shifts sound chipmunked or cavernous. A couple of semitones on most material passes unnoticed; half an octave is obviously processed. The controls allow ±12 semitones and 0.5× to 2× speed. One more thing worth knowing: the shift is calibrated for a 44.1 kHz source, so a 48 kHz file moves by less than the number you set — convert it to 44.1 kHz first if you need an exact interval.
An audio file up to 50 MB and 30 minutes long. You choose the output format — MP3, WAV, FLAC or OGG — and the processed file is returned for playback and download in the browser. Apply stays disabled until you actually move one of the sliders.
No. Pitch and tempo shifting is free and runs through ffmpeg on the server; you only need to be signed in. Nothing is stored — the working files are cleaned up as soon as the processed audio has been sent back to you.