SnipFree Audio 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, never uploaded
MP3WAVOGG
FLACAACM4A
Your file is never uploaded. 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
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.
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, no upload, 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.