A track that starts with a bang or stops mid-note sounds unfinished.
Set how many seconds at each end and get a clean fade in and out. Audio or video in, MP3 out.
By ShinobiTools Team · Last updated: September 2026
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Two seconds is the safe answer for music and works for almost everything. Half a second is enough for speech — longer and the first words disappear. For a background track under a voice-over, four or five seconds feels natural. Set one of the two to zero if you only want a fade at one end.
A fade changes the volume at the start and end; it doesn't shorten the file. If there's a stretch you want gone entirely, cut it first and then fade the piece you kept, so the fade sits exactly where the audio now begins. For a video, the trim tool does that; for an audio-only file, use an audio editor, since the trim tool here needs a video track.
Your file is uploaded to our own machine, processed there, and deleted immediately afterwards. Limits: 1200 MB and 20 minutes on the free tier.
Not every fade is the same shape. This tool ramps the volume in a straight line — a linear fade — from silent to full over however many seconds you set, and the same straight line on the way out. It's the simplest curve there is, and for most music and speech it's also the one that sounds most predictable: the midpoint of the fade is the midpoint of the volume change, with no surprises. Some audio software instead uses a curved, "equal-power" fade that stays louder for longer before dropping away, which can sound smoother on a fast crossfade between two tracks playing at once — but for a fade in from silence or out to silence, which is what this tool does, a straight line does the job without adding a knob nobody asked for.
Set the same number of seconds at both ends and the two fades won't necessarily feel equal, because what they're masking is different. A fade-in is hiding the start of a sound the listener hasn't heard yet, so it can be short without anyone noticing. A fade-out is cutting off a sound that's already established in the listener's ear, and a fade that's too short there reads as an edit rather than an ending. If you only adjust one of the two numbers, it's usually worth making the fade-out the longer one.
The same two numbers work for anything: fade music at the end of a DJ mix, fade MP3 audio for a podcast intro, or fade a voice memo that starts with a click. A short fade in sound effect, like a coin pickup or a notification chime, wants well under a second; a fade out sound effect such as rain or an engine can run much longer. A song that ends on a fade out sounds finished rather than cut off. As a music fader it suits DJ mixes and podcasts: to fade out a song, set the fade-out seconds, and a song fade out of two or three seconds suits most tracks. To fade out MP3 files, drop them in; an MP3 fade out works on the file itself. Fade out songs for a mixtape one after another, since there's no daily cap.
It's an audio fader online, not an audio editor online: the only volume change is at the two ends, and everything in between stays as it was. Audio or video goes in; the result is MP3 audio. Drop the file above, set the fade in and fade out, and download. It runs on our server, so it works in a phone's browser too.
Want an even volume throughout instead of a fade? Normalize audio does that. Dead air at the start or end? Remove silence from audio cuts it out; for background hiss, CleanGrab's noise remover is the right tool.
Enter how many seconds you want at the start and at the end, then download the result; for a fade-in only, leave fade-out at 0. To fade audio online you need nothing but a browser, on a phone as well as a computer.
Yes: set the fade-in to 0 and the fade-out to two or three seconds, which suits most songs.
Two seconds suits music; half a second is plenty for speech.
Yes: drop the video here and you get the faded audio back as an MP3. Then put it back under the picture with add music to video, or replace the audio track in your editor.
Yes. No account, no watermark, no daily limit.
No. Only the volume at each end changes.
No. You don't need a full audio editor online just to add a fade — this tool does that one job: set the seconds, download the result.
Yes. Premiere and GarageBand have fade handles on the clip, and After Effects uses keyframes on the audio levels. This page is for a quick fade at either end when you do not have those apps open.
You get an MP3 back whatever you upload. An MP3 fade out runs on our server and changes the volume at the ends only; the rest of the audio is untouched.
A fade-out drops the volume gradually from full to silence over the last few seconds, the standard way to end a piece of music or a podcast segment cleanly. A fade-in is the mirror: a gradual rise from silence to full at the start.
Open this page in your phone's browser, upload the file, and it works the same as on desktop.
Keep the fade-in short, under a second, so the first beat isn't buried, and make sure the source track isn't already clipped before you upload it.
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