Speed up or slow down audio without the chipmunk effect. Set the speed in the convert step (1.5 = 50% faster) — the pitch stays natural.
We change the tempo with ffmpeg's atempo filter, so the audio plays faster or slower while voices and music keep their natural pitch — no chipmunk or slow-mo distortion.
Choose anywhere from half speed (0.5) to double speed (2.0) in the convert step. Keeps your format, or pick another.
Upload your file — it's pre-set to 1.5× speed. Set the Speed in the convert step (e.g. 0.75 to slow down, 2 for double speed) and download.
No — unlike simply resampling, the tempo change preserves pitch, so it sounds natural at the new speed.
Yes, and no account is needed. Anonymous files are temporary and encrypted in transit.
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