Audio Speed Changer

Create sped up or slowed audio versions locally in your browser.

Your audio file is processed locally in your browser. Nothing is uploaded or stored.

Make sped up or slowed audio versions directly in your browser. This tool helps artists, producers, DJs and creators quickly create classic sped up or slowed versions from a local audio file.

Changing speed also changes pitch. This is the classic sped up / slowed effect. Version 1 does not preserve key, does not use professional time-stretching, does not use ffmpeg and does not modify your original file.

Speed processing

Local audio speed change

Drag & drop an audio file here

Accepted formats: WAV, MP3, FLAC, M4A, AAC and OGG when supported by your browser.

Speed Slider 1.15x Presets Prevent clipping

Speed Change Results

Sped Up / Slowed Tips

1.10x to 1.25x is common for sped up versions
0.75x to 0.90x is common for slowed versions
Speed changes also affect pitch
For professional time-stretching without pitch change, use dedicated audio software