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 is never uploaded - it's processed right here in your browser.
Free sound packs
Royalty-free kits and packs made with our own engines - use them in anything you release.
FREEAmbient pack · 26 loops
Pads & Textures
Lush pads, drones, vinyl, rain, ocean, fire and crickets - all seamless 16-second loops.
Download free →
FREEDrum kit · 58 sounds
Lo-fi & Boom Bap Drum Kit
Dusty drums, rhodes chords with tape wobble, vinyl and rain - plus 13 loops and MIDI.
Download free →
FREELoop pack · 40 loops + MIDI
Melody Loops Pack
8 sets of chords, arp, melody and pad layers that stack - lo-fi, trap, pop, R&B, afro, house.
Download free →
FREEMusic pack · 25 tracks
No-Copyright Background Music
Instrumentals for YouTube, streams and podcasts - safe for monetised videos, no credit needed.
Download free →
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's kept free by people who choose to support it. 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.
MP3 or WAV?
MP3 is small and plays everywhere - best for sharing and phones. WAV keeps every detail of the render, for editing or uploading to a music platform.
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 get a full original song with vocals - free and unlimited.
Speed and pitch
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Make a song
Full original songs with vocals from your lyrics - free and unlimited.
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