Change Audio Speed
Speed up or slow down audio without changing pitch — free, client-side.
100% in your browser
No watermark
No sign-up
How it works
- Select an audio file — it never leaves your device.
- Pick a speed (0.5×–2×).
- Click change speed — the audio is re-rendered locally, keeping its pitch natural.
- Your audio downloads automatically.
Frequently asked questions
- Is my audio uploaded?
- No. The speed change runs in your browser with ffmpeg.wasm; the file never leaves your device.
- Does it change the pitch?
- No. It uses tempo adjustment (atempo), so voices and music keep their natural pitch.