Speed up or slow down any track from 0.5x to 2x — with the pitch kept natural, or shifted too if you want. Free, private and instant in your browser.
Open the Audio Studio
Go to the DefyAudio Studio and upload your file.
Open the Effects tab
Switch to the Effects tab in the settings rail.
Set the Speed slider
Drag Speed between 0.5x (slower) and 2x (faster). Pitch stays natural — the track just plays quicker or slower.
Export
Choose a format and download your sped-up or slowed-down track — processed locally.
0.5x to 2x
Slow a track down to half speed or push it up to double, smoothly.
Pitch stays natural
Speed changes tempo without the chipmunk effect — pitch is preserved by default.
Or shift pitch too
Want the classic sped-up sound? Raise the separate Pitch slider alongside Speed.
Any format
Speed up MP3, WAV, FLAC and more, then export in any format.
Changing audio speed is useful in dozens of ways: slow down a song to learn a solo, speed up a lecture or podcast to save time, tighten the pacing of a voiceover, or create sped-up and slowed edits for social media. DefyAudio lets you set tempo anywhere from 0.5x to 2x with a single slider.
By default, pitch is preserved so a slowed track doesn't sound muddy and a sped-up one doesn't sound like a chipmunk. If you want the classic pitched-up 'nightcore' or pitched-down 'slowed' sound, the separate Pitch slider lets you shift the key at the same time.
Upload your file to DefyAudio, open the Effects tab, and move the Speed slider between 0.5x and 2x — then export. Free, with no upload.
No — by default the Speed slider changes tempo while keeping pitch natural. If you want the pitch to shift too, use the separate Pitch slider.
From 0.5x (half speed) to 2x (double speed), in 0.1x steps.
No — speed changes run in your browser, so your file stays on your device.