Change audio speed
Speed up a podcast or slow down a lesson, with the pitch left where it belongs.
Your file
Drop a file here, or click to choose
It stays on this device. Nothing is sent anywhere.
Settings
Time stretching, not pitch shifting
Playing a recording faster the naive way raises the pitch, which is why fast-forward sounds like a chipmunk. The atempo filter used here stretches time and leaves the pitch alone, the same technique your podcast app uses for 1.5× playback. The difference is that this bakes it into the file, so it plays that way in anything.
Practical speeds
1.25× and 1.5× are comfortable for most speech. 2× works for a clear, well-paced speaker. 3× is intelligible but exhausting. Below 1×, slowing to 0.75× is genuinely useful for transcription and language practice.
Common questions
Does the voice sound unnatural?
Slightly, at 2× and above, in the form of a faint warble on sustained sounds. Speech holds up much better than music does.
Can I speed up a video the same way?
Yes, change video speed applies the same audio filter alongside the picture.