Free Audio Speed Changer

Slow Down or Speed Up Audio Online — Free, Private, No Sign-up

SnipSound's Audio Speed Changer lets you slow down or speed up any audio file directly in your web browser. Drop in an MP3, WAV, OGG, FLAC, AAC or M4A, drag the speed slider from 0.25x (a quarter speed) to 4x (four times faster), preview the result, and save it as a WAV. Nothing is uploaded.

Common use cases

• Transcription & lyric work. Slow down a song to 0.5x or 0.75x to catch fast lyrics, drum patterns, or guitar lines you want to learn.
• Language learning. Slow down a foreign-language podcast or audiobook for better comprehension.
• Podcast time-saving. Speed up a long-form podcast to 1.25x or 1.5x to fit it into a commute.
• Sound design. Half-speed a drum loop for a slow, heavy texture, or double-time it for chipmunk effects and creative transitions.
• Tempo testing for video. Try a track at 0.9x or 1.1x to see if it fits the cut of a video better than the original tempo.

Why use SnipSound

• 100% browser-side. Other speed changers upload your audio to a server. We don't.
• No file size limit. Most tools cap uploads at 50–250 MB; we don't.
• Wide range. 0.25x to 4x covers everything from extreme slow-mo transcription to fast-forward podcast skimming.
• WAV export. Lossless output you can drop straight into any DAW or editor.