Free Audio Speed Changer

Music Speed Changer

Slow a song down, speed it up to nightcore, or set any speed from 0.25× to 4× — with one-click vibe presets, live preview and instant download. Your file never leaves your browser. Looking for the dreamy reverb sound? Use our Slowed + Reverb Maker.

No file handy?

Drop audio file here

or click to browse — processed in your browser — your file never leaves your device

MP3WAVOGG FLACAACM4A

Your file never leaves your device. All processing happens in your browser — nothing is sent to a server. Privacy policy.

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Speed 1.00×
One-click vibes
Reverb Off
Original: — New duration: —
Drag to move the playhead · pinch to zoom

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. Your files never leave your device.

Common use cases

Why use SnipSound

Frequently Asked Questions

How do I slow down or speed up audio online?▼
Drop your audio file onto the page, drag the speed slider (or click a preset like 0.5x or 1.5x), preview the result, and download. Everything runs in your browser.
How do I make audio or an MP3 slower online?▼
Drop your MP3 (or WAV/M4A/OGG) in and drag the speed slider below 1× — try 0.8× or 0.5× — to make the audio slower. Preview, then download the slowed file. Free, your files stay on your device, no sign-up.
How do I make a slowed + reverb song?▼
Drop your audio in, click the Slowed + Reverb vibe (or set the speed near 0.8× and raise the Reverb slider), preview, and download — the reverb is baked into the exported file.
How do I make a nightcore / sped-up version?▼
Click the Nightcore vibe — it speeds the track to ~1.3×, which also raises the pitch for that classic nightcore sound. Tweak the speed slider to taste, then download.
Does the pitch change when I change the speed?▼
Yes. This tool uses simple resampling, so slowing down lowers the pitch and speeding up raises it — the classic “tape effect”. Pitch-preserving (time-stretch) mode is on the roadmap.
Is my file uploaded to a server?▼
No. All processing happens entirely in your browser via the Web Audio API. See our privacy policy.
What formats are supported?▼
Any format your browser can decode — MP3, WAV, OGG, FLAC, AAC, M4A, and more.
What format is the output?▼
WAV (16-bit PCM, original sample rate). Lossless.