Audio speed changer

Files up to 100 MB and 60 minutes long.

Your file is deleted from our server as soon as the result is made, and the result 15 minutes later.

Result

Preview before you download

Add your file to begin. The result shows here.

Speeding up the slow parts?

Studio removes the long pauses instead, so the episode is tighter and still sounds natural.

Edit a full recording free

00:20How it works

How to change the speed of an audio file

Add your audioPlay it in the preview: it runs at the speed you choose, so you can decide before uploading.
Pick a speed0.75× to slow down, 1.25× to 2× to speed up, or type any value from 0.5 to 3.
Keep the pitch, or let it changeKeeping it makes a voice sound like the same person talking faster. Letting it change sounds like tape played fast.
Change speed and downloadThe result comes back in the format you uploaded, or choose MP3, WAV, M4A, FLAC or OGG.

00:30The details

What goes in and what comes out

Accepts: MP3, WAV, M4A, AAC, OGG, OPUS, FLAC, WMA, AIFF, AMR
Returns: The same format as your file, or one you choose
Limits: Files up to 100 MB and 60 minutes long.
Privacy: Your file is uploaded to our processing server over an encrypted connection, worked on, and deleted. The uploaded file is removed as soon as the result is ready; the result is removed 15 minutes later. Nobody looks at it and it is never used for anything else.
Cost: Free. No account, no watermark, no trial that runs out.

00:35Worth knowing

Getting a good result

Speeds that stay understandable

Most people follow speech comfortably at 1.25× to 1.5×. At 2× you catch the gist of a clear speaker. Slowing to 0.75× helps with transcribing by hand, learning a language or working out a piece of music.

Pitch kept or shifted

Keeping the pitch stretches or squeezes the sound in time without changing its notes. Shifting it changes both together, as a record does when played at the wrong speed: faster is higher, slower is deeper.

00:40Questions