Free is enough for most one-off jobs. Pro raises the file and batch caps; Pro + Media unlocks GB-scale streaming and unlimited duration.
Larger files supported on Developer (5 GB CSV) and Enterprise (unlimited). All processing happens in your browser — files never reach a server.
Drop your audio file
Set fade-in and fade-out durations
Download the smoothly faded file
0 bytes uploaded. Fade In / Fade Out runs entirely in your browser using FFmpeg.wasm 8.1, RNNoise, and the Web Audio API. Your audio stays on your device at all times. No data is sent to any server — critical for sensitive interviews and confidential calls.
Linear is fine for most uses. Exponential fades feel smoother on the ear and are the standard for music intros and outros.
Cut start/end timestamps from any audio file. JAD re-encodes once at the source quality — your file never leaves the browser.
Open toolConcatenate MP3, WAV, FLAC, M4A files end-to-end. Optional crossfade between tracks. All processing local.
Open toolSmooth out loud and quiet passages so voices sit consistently in the mix. Broadcast-style compression with adjustable threshold, ratio, attack, and release.
Open tool