Audio fade in and out

With Audio fade in and out, podcasters, musicians and audio editors can prepare a track during an edit. Soften the start and end of an audio file, with the curve that sounds right.

Soften the start and end of an audio file, with the curve that sounds right. Use it free in your browser with no account required.

How to use

Select the audio file whose beginning or ending you want to soften.
Enter the fade-in length in seconds, or leave it at zero if you do not need one.
Set the fade-out length in seconds to match the ending you have in mind.
Choose constant power or linear curve, then apply the fade.
Listen to the result and download it if the transitions feel natural.

Example

For a short jingle or podcast segment, a brief fade-in avoids a click at the start, while a fade-out gives the ending a smoother exit. Try constant power for a gradual feel, then compare it with the linear curve to hear the difference.

Limits and formats

This tool only adds fades; it cannot trim, merge, denoise or repair an audio file.
Fade lengths are entered in seconds and should stay shorter than the file for the effect to work.
Constant power and linear curves sound different, so listen before you keep the exported version.
The original file is not overwritten, but confirm the output format before using it in another app.

Where processing happens

The fade calculations take place in your browser. The audio stays on your device, the curves are applied locally, and no data is sent outside.

Frequently asked questions

What is the difference between constant power and linear fades?

A constant power curve spreads the energy more evenly to the ear, which often sounds smoother on music. A linear curve changes volume in a straight mathematical line. Test both on your file, because the better choice depends on the content.

Can I add only a fade-in and no fade-out?

Yes, set a fade-in duration and leave the fade-out value at zero. The tool will then leave the end of the audio untouched while softly bringing in the beginning.

Does applying a fade change the total length of the track?

No, fading only changes the volume during the chosen opening or closing seconds. The audio duration remains the same, so your timings and edits stay aligned.