Change Audio Speed
Speed up or slow down sound files, their pitch kept or not, many at once, in your browser
Drop sound files here
Or choose them: MP3, M4A, WAV, FLAC, OGG, or videos for their sound; they stay in your browser
Speed
Speed
Pitch
Save as
1.25 times as fast, voices and notes at the same pitch: good for podcasts, lessons and practising music.
Each sound is changed whole in your browser's memory, up to 20 minutes long. MP3, M4A and OGG are written at 192, 192 and 128 kbps; WAV and FLAC lose nothing. WMA and AIFF aren't read.
How to change the speed of an audio file
- Drop your sound files on the page or choose them.
- Pick the speed, from 0.5× to 2×, and whether to keep the pitch or change it like a tape.
- Pick the format; each file is changed as soon as it's added and can be downloaded.
Questions
Can I slow down a song without changing its pitch?
Yes: choose Keep the pitch; the notes stay the same, only the tempo changes, to practise an instrument or learn the words.
What does Like a tape do?
It plays the sound faster and higher, or slower and lower, as a record or tape played at another speed: for nightcore, slowed versions or effects.
Are my files uploaded?
No. They're changed by your browser, on your device, and never sent anywhere.
How long can the sound be?
Up to 20 minutes, as it's changed whole in your browser's memory; trim a longer one into parts first.