Add a fade in and fade out to any audio file: set each length, choose the curve, preview it, and export. Free, in your browser, no upload.
The audio fade tool adds a fade in at the start of a track, a fade out at the end, or both. Set each length separately, from a tenth of a second up to 30 seconds, and choose how the volume moves: Smooth for most music, Linear for a plain even ramp, S-curve for a gentler start and finish, or Slow start for a fade that holds back and then arrives. The preview can jump to a few seconds before the fade out, so you don't have to sit through the whole song to hear the ending.
Use it to stop a clip beginning or ending with a click, to end a song that has no natural finish, or to soften the edges of a section you have trimmed with the audio cutter. It fades one file. Overlapping the end of one track with the start of another is a crossfade, and the audio joiner does that when you set its crossfade length. Your audio never leaves your device, and how to fade audio in and out covers how long a fade should be.
For cleaning up the edges of a clip, a very short fade of 0.1 to 0.5 seconds is enough to remove a click without being noticed. A musical fade out at the end of a song usually runs 4 to 10 seconds. Fade ins are generally shorter than fade outs, often 1 to 3 seconds, because a slow fade in can make the opening feel late.
Smooth is the safe default for music and speech. Linear lowers the level at an even rate, which can sound as if it drops away quickly at the very end. S-curve eases in and out of the fade, and Slow start stays quiet for longer before rising, which suits a fade in under a voiceover. The difference is easiest to hear on fades of several seconds.
A fade changes the volume of one track, from silence up or down to silence. A crossfade overlaps two tracks so that one fades out while the next fades in. This tool applies fades to a single file. To crossfade two or more files, add them to the audio joiner and set its crossfade length.
Yes. Drag either slider to zero and it reads Off, so you can apply just a fade in, just a fade out, or both. Each fade can run up to 30 seconds in tenth-of-a-second steps. On a file shorter than about a minute, the maximum drops to just under half its length so the fade in and fade out can never overlap; a 20-second clip allows up to 9.9 seconds each.
No. Fades are applied within the existing audio: a fade out brings the final seconds down to silence rather than adding time after the track, so the export is exactly as long as the original. The export follows the same curve you heard in the preview, and you can save it as WAV, as MP3 at 128, 192, or 320 kbps, or as Opus in browsers that support it.