Your audio is decoded, processed and encoded entirely in your browser — nothing is uploaded. Speed below 1× lowers the pitch (slowed); above 1× raises it (nightcore). Reverb is generated locally. WAV is lossless; MP3 is re-encoded with LAME. Input: MP3, WAV, OGG, M4A and more.
A slowed + reverb and nightcore maker that turns a song into a slowed + reverb or nightcore edit right in your browser. Drag and drop or choose an MP3, WAV, OGG, M4A or other file (whatever your browser can decode), then pick a preset — Slowed + reverb, Nightcore or Super slowed — or set the speed (pitch), reverb mix and reverb space (Room / Hall / Cathedral) yourself. Speed below 1× slows the song down and lowers the pitch for that slowed sound; above 1× speeds it up and raises the pitch for nightcore. Preview it, then export as WAV (lossless) or MP3 (128–320 kbps) and download. The reverb is generated locally, and decoding, processing and encoding all happen entirely inside your browser — the file is never uploaded, stored or sent to a server. Great for making slowed audio for social clips and short videos, mellow study or sleep edits, or nightcore tracks. No install, no sign-up, free to use.
How to use
- Drop a song (MP3 / WAV / OGG / M4A and more) or use "choose a file" to load it.
- Pick a preset (Slowed + reverb, Nightcore, Super slowed) or set the speed (pitch), reverb mix and reverb space.
- Hit "Preview" to check it, choose the output format (WAV / MP3) and click "Render & download" to save.
FAQ
Is my song uploaded?
No. The song you load is decoded, processed and encoded inside your browser — it is never uploaded, stored or sent to a server. Everything runs locally.
What's the difference between slowed + reverb and nightcore?
Both change the playback speed, which also shifts the pitch. Below 1× the song gets slower and lower — add reverb and that's slowed + reverb. Above 1× it gets faster and higher, which is nightcore. The presets make either one in a click.
Which formats can I load, and what can I export?
Input can be MP3, WAV, OGG, M4A and more — whatever your browser can decode. Output can be WAV (lossless) or MP3 (choose 128–320 kbps).
Can I control how strong or long the reverb is?
Yes. The reverb mix slider blends the dry signal with the reverb, and the reverb space (Room / Hall / Cathedral) sets the tail length — bigger spaces give a longer, more spacious sound.
Can I edit copyrighted songs?
The processing happens entirely on your device, but if you publish or share the result, respect the rights of the original track. Please check the terms yourself, including whether your use is personal.