Audio Speed Changer
Speed up or slow down audio. Free, no signup, no upload.
How It Works
Select an audio file and adjust the speed slider. Click Change Speed and the audio is re-sampled at the new rate. Speeds below 1x slow it down, above 1x speed it up. Download the result as WAV. No file is ever uploaded to a server.
Why Change Audio Speed?
Slowing down audio is useful for transcription, music practice, and language learning. Speeding up is great for listening to podcasts and lectures faster. Note that changing speed also changes pitch proportionally.