Free Slowed + Reverb Effect

The sped-up TikTok style, flipped: slower and dreamier.

Free to use on Mac, Windows, and mobileNo installation requiredTLS encryption keeps your files safe

What is this tool

AudioToolKit makes slowed + reverb audio online for free, in your browser. The preset slows any track to 0.8x with a time-stretch that preserves pitch, then adds a medium reverb so the result floats — the ambient treatment behind the slowed-reverb trend. No upload, no install: the processed track downloads as MP3 or WAV straight from your device.

Drag and drop your file here

MP3, WAV, M4A, AAC, OGG, FLAC, AIFF, AIF, OPUS, WMA, AMR — up to 25 MB per file

Output format

Output

Slowed + reverbed MP3 or WAV

Accepted formats

.mp3, .wav, .m4a, .aac, .ogg, .flac, .aiff, .aif, .opus, .wma, .amr

Why use this free tool

Slowed + reverb is the ambient treatment that made songs like Dreams and Mortals famous in a second life. The preset slows the track to 0.8x — pitch preserved — then adds a medium reverb so it floats.

How does the free slowed & reverb work?

1
Upload the track.
2
Press Process — 0.8x tempo plus reverb are applied automatically.
3
Download the result.

Frequently asked questions

Does the pitch drop when it slows?

No. The time-stretch keeps the key, so the song stays in tune at 80% speed.

Can I change the amount?

For a custom mix, use the Tempo Changer and Reverb tools separately.

Local processing?

Yes, in your browser.