Add a fade to an audio file
Set how many seconds of fade in and fade out you want and download the audio with smooth fades, in its same format.
Your files never leave your device
How to add a fade
- 1
Upload the audio
We read its real duration.
- 2
Pick the seconds
Fade in and fade out separately (0 = no fade).
- 3
Download the result
Same format as the original.
Why use this tool
Clean starts and ends
Goodbye to abrupt cuts when a clip starts or ends.
Control in seconds
You decide the exact length of each fade.
Private
Your audio never leaves your device: ffmpeg runs inside your browser.
Real engine
ffmpeg, the industry standard, compiled to WebAssembly and self-hosted.
Frequently asked questions
Can I add only a fade out?
Yes: leave fade in at 0 and set only the ending (or the other way round).
What length sounds natural?
1-3 seconds usually works for music; for speech, 0.5-1 second avoids eating the first word.
Is the fade linear?
We use ffmpeg’s standard (triangular) curve, the one that sounds natural in most cases.