Audio Fade In and Out

Add a smooth fade in at the start and a fade out at the end. Set each length on its own slider, watch the waveform taper, then export as MP3 or WAV. The easy way to stop a track beginning or ending with an abrupt jump.

Add a fade in and fade out to audio online free, with no software to install. Set each length on its own slider, watch the waveform taper, then export as MP3 or WAV. It works as an audio fader for smoothing a track that starts or ends with an abrupt jump, ideal for podcasts, intros and loops. Everything runs in your browser, so nothing is uploaded.

Read the guide: How to Fade Audio In and Out
Drop an audio file here, or

How it works

  1. 1

    Add an audio file

    Drop in an MP3, WAV, OGG or M4A file to see its waveform.

  2. 2

    Set the fade lengths

    Use the two sliders to choose how long the fade in and fade out last. The waveform shows the taper.

  3. 3

    Export the result

    Preview the fades, then save the file as MP3 or WAV.

Instant & 100% private — nothing is uploaded

Everything runs locally in your browser. Your files are processed on your own device and are never sent to a server, so there are no upload waits, no size limits from us, and nothing is ever stored or logged.

Frequently asked questions

How do I add a fade in and fade out to audio?
Add your file, then use the two sliders to set how many seconds the start should fade up over and the end should fade down over. The waveform tapers so you can see it, and you preview before saving.
Why does my track need a fade?
A clip that starts or stops at full volume can begin with a click or end with an abrupt cut. A short fade in eases the start and a fade out gives a clean, professional ending, which is essential for podcasts, intros and loops.
Can I fade just the start or just the end?
Yes. Set one slider to the length you want and leave the other at zero. You can fade in only, fade out only, or do both with different lengths.
What formats can I add fades to, and is anything uploaded?
You can fade MP3, WAV, OGG and M4A files and export as MP3 or WAV. The fades are applied in your browser on your own device, so nothing is uploaded, and the file comes back with no watermark and no sign-up.

More tools

Online Audio EditorFull waveform editor: cut, fade, amplify and apply effects.Trim Audio OnlineSet in and out points on a waveform and export MP3 or WAV.Merge Audio FilesJoin several tracks into one, in the order you choose.Change Audio VolumeAmplify, lower or normalize loudness, then export.Audio ConverterConvert between MP3, WAV, OGG and M4A.Extract Audio from VideoPull the soundtrack out of a video as MP3 or WAV.

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