Change audio speed, keep the voice
Lectures at 2x, practice tracks at 0.75x. Pitch preserved, nothing uploaded.
Drop audio files here or click to browse
The converter downloads once (about 32 MB), then works offline. Your videos stay on your device.
Time is the one thing recordings waste
A one-hour meeting recording holds forty minutes of listening at 1.5x, and comprehension barely drops for most people. Musicians go the other way: a solo at three-quarter speed with the original pitch is how you actually learn it. QuietPix retimes the audio with FFmpeg's tempo filter on your device, so private recordings stay private.
Frequently asked questions
Does changing speed change the pitch?
No. The tempo filter stretches time while preserving pitch, so voices stay natural: no chipmunk at 1.5x, no monster voice at 0.75x.
What is this useful for?
Listening to lecture and meeting recordings at 1.5-2x, slowing down music practice sections to 0.75x, transcribing fast speakers at half speed.
Is my audio uploaded?
No. The processing runs in your browser through WebAssembly FFmpeg. Recordings never leave your device.
What formats can I speed up?
MP3, M4A, WAV, FLAC, OGG and Opus all work; the output is a high-quality MP3 at the new speed.