ManySong Remixer
A remix studio in your browser — key lock, beat detection, waveform trimming and a real limiter. Nothing is uploaded.
Drop an audio file here
or browse — MP3, WAV, M4A, OGG, FLAC. Processed locally, never uploaded.
Rendered offline in your browser at full quality — the file never leaves this device.
Only remix audio you own or have the rights to use.
A free online remix studio — slowed + reverb, nightcore, 8D and lo-fi, done properly
The ManyHand Song Remixer runs entirely in your browser. Load a track and it is analysed on the spot for tempo and musical key, then drawn as a three-band waveform you can click to seek, drag to trim and loop. Key lock lets you move the tempo without moving the pitch — so a track can be slowed for practice or sped up for a set without turning the vocal into a chipmunk — and a separate pitch slider transposes in semitones when you do want the key to move.
The effects are the ones remixes are actually made from: a three-band EQ, a plate reverb with size and decay and a proper dry/wet balance, an echo that locks to the detected beat, 8D stereo rotation and a warmth filter. A look-ahead brickwall limiter holds the output under the ceiling you set, so bass boost and long reverbs no longer clip the download. Hold A/B at any time to hear the untouched original. Export renders offline through the identical signal path at 16- or 24-bit, so the WAV is exactly what you auditioned.
Is my song uploaded to a server?
No. Your track is decoded and processed entirely in your browser — the audio never leaves your device.
Can I change the tempo without changing the pitch?
Yes — that is what Key lock does, using WSOLA time-stretching. Switch it off for the tape-style pitch drop that slowed + reverb and nightcore rely on, or use the Pitch slider to transpose on its own while the tempo stays put.
How do I make a slowed and reverb remix?
Press the Slowed + Reverb preset. It takes the tempo to 0.85×, with key lock off so the pitch falls with it, adds a long reverb and softens the top end. Adjust anything by hand, then render.
Can I remix only part of a song?
Drag across the waveform to select a region and press Loop to audition it. The export renders just that selection — the panel tells you which, and how long the result will be.
Why does my remix no longer clip?
A look-ahead limiter sits on the output at a ceiling you choose, −1 dBFS by default, and it runs in the export as well as the preview. You can also normalise the finished render.
More free music tools: DJ Turntable · Online Piano · Drum Machine · Online Harmonium