Loop & SlowdownLoop & Slowdown
Loop any part of a local song, slow it down without changing pitch, and speed up loop by loop. · Works offline
MP3 / M4A / WAV / OGG or anything your browser plays. The file is processed on this device and never uploaded.
0:00.00No loop set0:00.00
Changes tempo without changing pitch (0.5–1.5×). Keys: Space play/pause, [ set A, ] set B, \ clear loop.
Named markers Pro
Progressive speed-up Pro
Audio and markers stay in your browser. This page never sends audio to any server.
Features
- Open a local audio file (never uploaded), see its waveform and click to seek
- A–B loop: set A and B while playing; playback jumps back to A at B
- Slow down or speed up 0.5–1.5× without changing pitch
- Keyboard: Space play/pause, [ set A, ] set B, \ clear loop
- Named markers with one-tap loop to the next marker (Pro)
- Progressive speed-up: raise the speed every N loops up to a cap (Pro)
What you enter is stored only in this device's browser storage.