Slowed + Reverb Maker
Upload a song, dial in the slowdown and reverb amount, preview instantly and download your edit — the aesthetic slowed + reverb sound in one click.
100% client-side Free forever No sign-up
Runs 100% in your browser — nothing is ever uploaded.
Frequently asked questions
Are my audio files uploaded?
Never. Your file is decoded and processed with the Web Audio API directly in your browser. It never touches a server — processing even works offline.
What formats can I upload and download?
Upload anything your browser can play: MP3, WAV, OGG, M4A/AAC and FLAC in most browsers. The processed result downloads as a high-quality WAV file.
Is it really free? Any length limit?
Completely free with no watermark. There is no hard length limit — a typical 3-5 minute song processes in seconds; very long files just need more memory.