Change audio speed and pitch online

Frequently asked questions

Is my audio uploaded anywhere?

No. The audio is decoded and processed entirely in your browser — it never leaves your device, and there's no account. You only get a file when you press download.

Can I change speed without changing pitch (and vice versa)?

Yes — that's the point. It uses real time-stretching, so you can slow a track down without it sounding low and slurred, or drop the pitch without changing the tempo. The Speed and Pitch sliders are fully independent.

Can I make nightcore or slowed + reverb edits?

Speed and pitch are exactly the controls those edits use — try the Nightcore and Slowed presets as a starting point, then fine-tune. (This tool changes speed and pitch; it doesn't add reverb.)

Can I slow a song down to learn or transcribe it?

Yes. Drop the speed to 0.5–0.75× with pitch at 0 to hear every note clearly while staying in the original key — ideal for practising an instrument or transcribing.

Can I download the result, and how good is the quality?

You can download the processed audio as MP3 or WAV. Quality is very good for moderate changes; large stretches (well below half speed or beyond ±7 semitones) can introduce some artefacts, as with any time-stretching.