Load a song and change its pitch and its speed on their own. Move the key up or down by up to 12 semitones without changing the tempo, or slow a song down to practice it (as slow as 50%) or speed it up (up to 200%) without changing the key. Preview the result live while you move the sliders, then download it as a WAV file. Everything happens in your browser, so your file is never uploaded. The preview is free with no sign in, and the WAV download needs a free account. No credits are used.
Load the file, move the Pitch slider up or down by the number of semitones you need, and press Preview to hear it. One semitone is one fret on a guitar or one key on a piano, so moving up 2 takes a song in C to D. The tempo stays the same.
Move the Tempo slider below 100%. At 50% the song plays at half speed in the same key, which is handy for learning a part. Above 100% it speeds up, again without changing the key.
Yes. The two sliders work independently, so you can, for example, lower a song by 2 semitones and slow it to 80% in one go.
No. The file is decoded and processed in your browser, and the WAV you download is created on your device. Nothing is sent to our servers.
Yes. Loading a file and previewing changes is free with no sign in. Downloading the WAV needs a free account, and no credits are used. If you sign in partway through, the tool keeps your settings and tries to keep your file too.
Any audio file your browser can play, which in most browsers includes MP3, WAV, M4A and FLAC. Files can be up to 100 MB and 15 minutes long. The download is a WAV file at 44.1 kHz.
Small changes sound very natural. Big shifts, like a full octave or half speed, can add some smearing or a slightly robotic tone, because the sound is being stretched or squeezed that far.
Only if you own it or have permission. Changing the pitch or speed of someone else's recording does not make it yours, so releasing or uploading it needs the rights holder's permission. Practicing with it on your own is a different matter.