audio speed changer
speed up or slow down audio. keep the pitch natural, or let it shift like a tape for a classic effect.
runs on your device · free · no sign-up
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frequently asked questions
will voices sound normal?
yes by default; the audio is time-stretched with pitch preserved. tick the pitch option to get chipmunk or slowed effects.
what speed range is available?
0.25x to 4x.
are files uploaded?
no. ffmpeg in your browser handles it.