Slowed and Reverb Generator
Slow any song down, add lush reverb and download the edit — free, in your browser, nothing uploaded.
Drop an audio file here
MP3, WAV, M4A, OGG or FLAC — up to 60 MB
🔒 100% private — audio is processed in your browser and never uploaded.
How it works
- 1.Drop in an MP3, WAV, M4A, OGG or FLAC file, or hit the demo button to test the effect first.
- 2.Pick a preset or dial in your own speed, reverb amount and reverb size, then press Slow It Down.
- 3.Preview the result right on the page and download it as MP3 or WAV when it sounds right.
What the slowed + reverb effect actually is
A slowed + reverb edit does two things. First, it slows the track down the way a turntable or tape machine would, so the pitch drops along with the tempo. Vocals get deeper, drums hit heavier, and the whole song feels weightier. Second, it runs everything through a long reverb, which smears the transients and puts the song in a big, hazy room. Together they turn almost any track into something that sounds like a memory of itself.
The roots go back to DJ Screw's chopped and screwed mixtapes in 1990s Houston, where slowing records to around 60–70 BPM became a whole subgenre. Decades later, YouTube channels revived the slowdown, added reverb, and paired it with anime stills and rainy-window loops. The format exploded from there, and slowed versions of pop and rap songs now rack up millions of plays on TikTok and YouTube, sometimes outperforming the originals.
Getting the classic sound
If you only remember one setting, make it this: 0.8x speed with a medium reverb (about 35% mix and a 2.5 second tail). That is the combination the vast majority of popular slowed + reverb edits use, and it is the Classic preset above. It is slow enough to transform the mood without making vocals sound unnatural.
- 0.85x is a subtle slowdown that keeps the song recognizable. Good for tracks that are already mellow.
- 0.75x and below gets into deep, ambient territory. Push the reverb size toward 3–4 seconds to match, but back off the mix if vocals start to drown.
- Sparse songs take more reverb than dense ones. If a busy mix turns to mud, lower the reverb amount before touching anything else.
Why use this over an app or a DAW?
You could build this chain in any DAW, but for a quick edit it is overkill. This slowed and reverb maker runs entirely in your browser: no install, no account, and your audio never touches a server. Unlike most online slowed and reverb converter sites, there is no upload step at all, so a five-minute song processes in seconds and stays private. Preview, tweak, re-render as many times as you want, then export MP3 for sharing or WAV if you plan to edit further.
FAQ
Is this slowed and reverb generator free?
Yes, completely free. No sign-up, no watermarks, no limits on how many songs you convert. You can download the result as MP3 or WAV.
Do my files get uploaded to a server?
No. All processing happens inside your browser using the Web Audio API. Your song never leaves your device, which also means conversion is fast — there is no upload or download wait.
What settings give the classic slowed + reverb sound?
0.8x speed with a medium reverb (around 35% mix, 2.5 second tail) is the sound most slowed + reverb edits use. That is the Classic preset. Go slower and wetter for a deeper, more ambient feel.
Does slowing the song down also lower the pitch?
Yes, and that is intentional. Slowed + reverb edits use vinyl-style slowdown, where pitch drops with speed. That deeper, heavier tone is a core part of the aesthetic.
How is this different from nightcore?
They are opposites. Nightcore speeds a song up and raises the pitch for an energetic feel; slowed + reverb slows it down, lowers the pitch and adds space for a dreamy, melancholic feel.
Can I post my slowed edits online?
The tool itself is fine to use for anything, but the usual copyright rules apply to the music. Use songs you have rights to, or check the platform's rules before posting edits of commercial tracks.
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SongToolbox is an independent product and is not affiliated with, endorsed by, or sponsored by Suno, Inc., Udio, or any other music platform mentioned on this site.