Slowed + Reverb Maker
Turn any song into a dreamy slowed + reverb edit - or a sped up one. Keep the singer's natural pitch or go deep, preview it live, download a WAV.
🔒 Your audio never leaves your computer - it's processed right here in your browser.
How it works
Drop in a song
Any MP3, WAV, M4A, OGG or FLAC. Your browser opens it - no upload, no queue.
Shape the vibe
Pick a preset, choose whether to keep the original pitch, then adjust speed, reverb and bass while it plays.
Download
Get a full-quality WAV of exactly what you heard - as many as you like, free.
How to make a slowed + reverb song online
Slowed + reverb (and its opposite, sped up / nightcore) is the easiest way to give a familiar song a new mood. Here's how to make one in under a minute - no app, no account, and no upload.
Open your song
Drop an MP3, WAV, M4A, OGG or FLAC file onto the box above, or click Choose audio file. It opens instantly in your browser.
Start with a preset
Press play, then try Classic slowed, Dreamy or Subtle - or Sped up for a nightcore-style edit. Every change is heard live while the song plays.
Decide on the pitch
Leave Keep original pitch on for natural-sounding vocals, or switch it off for the classic deep, dragged-out slowed sound (and chipmunk-style sped up).
Fine-tune the vibe
Set Speed (0.80-0.90× is the sweet spot for slowed), make the space bigger with Reverb size, blend it in with Reverb amount, and add warmth with Bass boost. Click the waveform to jump to any part.
Download the WAV
Press Download WAV to save a full-quality file of exactly what you heard. Need an MP3? Run it through the free audio converter.
Frequently asked questions
Is it really free? What's the catch?
No catch - no credits, no sign-up, no watermark, no limit. It runs on your own computer, so it costs nothing to run and stays free. Swara Sound is a free, supporter-funded project.
What does "Keep original pitch" do?
Normally, slowing a song also lowers its pitch - voices get deep and sluggish (and sped-up songs sound like chipmunks). With Keep original pitch on, the timing changes but the notes stay where they were, so vocals sound natural. Turn it off for the classic, deeper "slowed" aesthetic.
Is my song uploaded anywhere?
No. Everything happens inside your browser tab using its built-in audio engine. Your file never reaches our servers or anyone else's.
Why WAV and not MP3?
WAV keeps the full quality of the render. Any converter or music app can turn it into an MP3 afterwards if you need a smaller file.
Can I post the result on YouTube or TikTok?
This tool edits audio - copyright stays with whoever owns the original song. For music you can freely use, make your own in the Swara Sound studio.
Want a song that's actually yours?
Write lyrics, pick a style, and generate a full original track in the Swara Sound studio - free, with your own Suno, Mureka or RunPod key.
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