Audio ToolsFree

Change Audio Speed

Speed up or slow down any audio file without changing the pitch. Adjust playback rate from 0.5x to 3x speed. Perfect for faster audiobook listening, slowing down music for practice, or speeding up lectures. In-browser, no upload, no signup.

Drop your audio anywhere, click to browse

MP3, WAV, OGG, FLAC, AAC · Any format

Ctrl+Vto paste a copied file

Frequently Asked Questions

Does pitch change when I speed up or slow down audio?▼
No. The tool uses pitch-preserving (time-stretching) algorithms so the audio sounds natural even at 2x or 0.5x speed — voices and instruments stay at the same pitch.
What speed range is available?▼
0.5x (half speed) to 3x (triple speed) in 0.25x increments. Most users prefer 1.25x-1.75x for efficient audiobook or lecture listening.
What formats are supported?▼
MP3, WAV, OGG, and FLAC. Output is saved in the same format as input.
Why would I want to slow down audio?▼
Slowing audio to 0.5x-0.75x is useful for music transcription, language learning, improving musical technique, or reviewing a recording in detail.
Is the speed change done in the browser?▼
Yes. FFmpeg.wasm handles the time-stretching locally. No file is uploaded to any server.