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Slowed and Reverb Generator

Drop in a track, slow it down and let the reverb bloom, then download it. Nightcore and 8D audio are one click away. Free, no sign-up, and your file never leaves your browser.

Slowed + reverb, nightcore, and 8D audio presets

Speed, reverb, and stereo settings

80%

Below 100% slows the song and drops its pitch. Above 100% is the nightcore direction.

35%

How much of the sound is washed into the reverb tail.

8D auto-panSweeps the stereo image around your head. Best on headphones.

The download is a full quality WAV of exactly what you are hearing, so the file is larger than the MP3 you started from.

Works on your own files, including unreleased demos. Nothing is uploaded.
How it works

How to make a slowed and reverb song in three steps

No sign-up, no software, and nothing leaves your device. Drop in a track, pull the speed down and the reverb up, and download the result in about a minute.

1

Upload the song you want to slow down

Drag in an MP3, WAV, M4A, FLAC, or OGG file, or tap to browse. The audio is decoded locally and never uploaded to a server, so an unreleased demo or a rough bounce works exactly as well as a finished release.

  • Accepts MP3, WAV, M4A, FLAC, and OGG
  • Nothing is uploaded, the file is read in your browser
  • Works on your own unreleased tracks, not just released songs
2

Pick slowed + reverb, nightcore, or 8D audio

One click loads a preset, then the two sliders are yours. Speed below 100% slows the song and drops its pitch, which is the whole slowed and reverb sound. Push it above 100% instead and you are in nightcore territory. Switch on the auto-pan and the track starts circling your head as 8D audio.

  • Slowed + reverb: speed down, reverb up, the classic late-night sound
  • Nightcore: the same trick inverted, sped up and pitched up
  • 8D audio: the stereo image sweeps around you, best on headphones
3

Preview it live, then download the WAV

Every slider move is heard immediately, so you can dial the mood in by ear rather than by guessing at numbers. What you hear in the preview is exactly what gets rendered, and the download is a full quality WAV of it, free, with no account and no watermark.

  • Live preview, the sliders retune the sound as it plays
  • The download is bit for bit what you previewed, not a re-render
  • Free WAV export, no sign-up, no watermark, no cap on how many tracks
Why this tool

Why use this slowed reverb maker

A free slowed and reverb generator that runs entirely in your browser, with nightcore and 8D audio built in from the same engine.

CreateYourMusic slowed and reverb generator, part of the AI music platform

A slow and reverb generator with real control

Two sliders, not a fixed filter. Set exactly how far the song slows and how deep the reverb tail runs, from a gentle wash to a fully drowned, cavernous mix.

A nightcore maker in the same window

Nightcore is the same effect run backwards, sped up and pitched up. One click flips the preset, so you never need a second tool or a second upload.

An 8D audio converter built in

Switch on the auto-pan and the stereo image sweeps slowly around your head, the effect people call 8D audio. Put headphones on before you try it.

Live preview, no render-and-wait loop

The sliders retune the audio while it is playing, so you hear the change as you make it. What you preview is exactly what the download renders.

Your file never leaves your browser

The whole chain runs locally on your device. Nothing is uploaded, nothing is stored, and nothing is ever shared, which is also why it works on private demos.

Free, no sign-up, no watermark

No account, no credit card, no install, and no audio watermark stamped over your download. Process as many tracks as you like.

Who it is for

Who uses a slowed and reverb generator

One engine, four very different reasons to reach for it, from an edit that has to land in fifteen seconds to a practice loop you will play a hundred times.

Editor preparing a slowed and reverb audio track for a short video

The editor making a slowed audio for a short video

Challenges

  • Most online tools watermark the export or cap the length
  • Desktop editors need an install and a project file for a 30 second clip
  • Uploading a full song to a stranger's server just to slow it down

Solution

Drop the track in, pull the speed to about 80%, push the reverb until it sits right, and download a clean WAV. No account, no watermark, and the file never left your browser.

Slowed audioVideo editsNo watermark
Slow a track down
Listener playing a slowed and reverb version of a song at night

The listener who wants a lofi, late-night version of a song

Challenges

  • Streaming apps have no speed or reverb control worth using
  • The version you want is not on any platform, only in your head
  • Video sites bury the good ones under ads and reuploads

Solution

Load your own file and shape it yourself, in seconds. Save the result and it is yours to keep, at full quality, on your device.

LofiSlowed + reverbLate night
Try the slowed preset
Nightcore fan speeding up a song with the nightcore preset

The nightcore fan speeding a track up

Challenges

  • Slowed tools and nightcore tools are usually two different sites
  • Speeding audio up without the pitch rising kills the nightcore effect
  • Most converters make you upload, wait in a queue, then pay to export

Solution

The nightcore preset is one click away from the slowed one, on the same engine and the same upload. Speed and pitch rise together, exactly as the sound requires.

NightcoreSped upOne click
Switch to nightcore
Musician slowing a song down to learn a part by ear

The musician slowing a song down to learn it by ear

Challenges

  • Practice apps that slow audio down want a subscription
  • Slowing audio in a video player smears it into mush
  • The track you are learning is a private recording no app has indexed

Solution

Slow your own file to whatever percentage makes it readable, loop it, and download the slowed take so you can practice against it later without reopening anything.

PracticeLearn by earTempo
Find its BPM and key
Questions

Slowed and reverb FAQ

What the presets actually do, what nightcore and 8D audio are, and the honest limits of processing audio in a browser tab.

Upload the track, pick the slowed + reverb preset, and it is done. The preset drops the playback speed to about 80% and mixes in a long reverb tail, which is the sound people mean by slowed and reverb. From there the two sliders let you go further or pull back, and everything you hear in the preview is what the download gives you. Nothing is uploaded to a server, the whole thing runs in your browser.

Yes, completely. There is no account, no credit card, no install, no watermark on the export, and no cap on how many tracks you can run through it. It is free because the work happens on your device rather than on a paid server, which is also the reason your audio never has to leave your browser.

Nightcore is a song sped up and pitched up at the same time, usually around 25% faster, which makes vocals sound brighter and higher and gives the track a rushing, energetic lift. It started as a style of remix built around dance and anime tracks and became a genre of its own. Technically it is the exact inverse of slowed and reverb: one pulls the playback rate down and takes the pitch with it, the other pushes it up and takes the pitch with it. That is why both live on this page as presets on one engine rather than as two separate tools.

8D audio is a track whose stereo image slowly circles around your head rather than sitting still between the speakers. There is nothing eight dimensional about it: the effect is an automatic pan sweeping the sound from one ear to the other, usually with reverb added so each position feels like a place in a room rather than a speaker. It only works on headphones, because on speakers your two ears both hear both channels and the illusion collapses. Switch on the auto-pan here and you have it.

Yes, and that is on purpose. Slowing playback down lowers the pitch with it, the same way a record played at the wrong speed sounds deeper, and that dragged, heavier pitch IS the slowed and reverb sound. A tool that slowed the tempo while holding the pitch fixed would give you something quite different, closer to a practice tool than to the genre. Nightcore is the same relationship running the other way, faster and higher together.

No. The file is decoded, processed, and rendered entirely inside your browser tab using the Web Audio API. It is never sent to our servers, never stored, and never seen by us, which is why the tool works offline once the page has loaded and why it is safe to use on an unreleased demo or a private recording.

The export is a full quality 16 bit WAV, which is uncompressed, so a three minute song lands around 30MB rather than the 3MB the MP3 you started from took. We chose that over re-encoding to MP3 because MP3 would compress audio that was already compressed once, and stacking lossy encodes audibly degrades the reverb tail, which is the part you came here for. If you need a smaller file, convert the WAV afterwards in whatever tool you already use.

That depends entirely on the song you put in, and it is worth being straight about it. This tool processes a file you already have, it does not grant you any rights to it. Slowing down a track you do not own does not make it yours, and posting it can still run into the original copyright, exactly as it would on any platform. If you want something you can use freely, generate an original song with our AI music generator and the result is yours.

Up to 10 minutes. The limit exists because slowing a song down makes the rendered output longer than the original, and the whole render is held in memory as raw audio, so a very long upload could exhaust the tab. If your track is longer, trim it first and run the piece you actually need.

No. There is nothing to download, no extension, and no sign in. Open the page, drop in a file, move two sliders, and take the result. Everything runs in the browser tab you already have open.

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