Fade audio in and out
Stop a track from starting or stopping dead. Set how many seconds each end should take, and the level is eased up and down for you.
Fit Meter
Settings appear once you add an audio file.
0 to start at full volume.
0 to end at full volume.
Advanced 3
Ignored by the lossless formats.
Still going. Your own device is doing this, so a long video or a big batch takes as long as it takes — and none of it is being uploaded.
Bytes sent anywhere: 0 B Bytes of your files sent anywhere: 0 B · nothing leaves this tab
Every request this page makes is listed as it happens. You’ll see our own code loading, for some formats a codec engine, and anonymous usage analytics marked STATS — but never your file going out.
- Waiting for network activity…
Check it yourself: open your browser’s developer tools on the Network tab, or turn off Wi-Fi once the page has loaded. The tools keep working.
How to use it
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Add your files
Drop in the song, podcast or voice note. Several at once is fine: every one gets the same fades.
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Check the settings
Set the seconds for each end. Two seconds in and three out suits most music; half a second is enough to stop a click.
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Save the result
Press add the fades and save the result.
Why it doesn’t upload
A fade is a multiplication: each sample is scaled by a number that moves from 0 to 1. Your browser can do that on a whole album in the time it would take to upload the first track, so there is no reason to send it anywhere.
How to check for yourselfWorth knowing
- The audio is encoded again, because the samples themselves change. Choose WAV or FLAC to keep it lossless, or raise the bitrate if the original was high quality.
- Fades are applied to the very start and the very end. To fade around a point in the middle, cut the file first with Trim Audio.
- A fade longer than the file fades all the way through it, which is quieter than you probably want.
- Uses the FFmpeg engine, a one-time 31 MB download.
Questions
How long should a fade be?
For music, 2 seconds in and 3 out sounds natural. For speech, half a second at each end is enough to stop the recording clicking on and off. For a ringtone, keep both under a second so the tune starts quickly.
Which fade shape should I pick?
Smooth for almost everything: it follows a quarter sine curve, which the ear reads as even. Linear drops by the same amount each second, which can sound like it falls away quickly at the end. The slow-start and fast-start shapes are for matching a fade to something else, like a video cut.
Does fading lose quality?
The samples have to be rewritten, so a lossy format is compressed again. At 192 kbps or above that is inaudible, and saving as WAV or FLAC avoids it entirely.
Can I fade a video’s audio?
Not here. Pull the sound out with Extract Audio, fade it, then put it back with Replace the Audio when that tool is ready.
Why does my track still start abruptly?
The fade starts at the first sample of the file. If the track has a second of silence before the music, the fade happens during that silence. Trim the silence first with Remove Silence or Trim Audio.