Audio Fade Tool: Add Fade In and Fade Out Online

Give a recording a smooth start and ending: choose how long the fade-in and fade-out last and which curve they follow, and hear the result before you download it.

Online Audio Fade Maker

A fade-in raises the volume gradually from silence at the start; a fade-out lowers it to silence at the end. Your file is processed in your browser and never leaves your device.

Which Fade Curve Should You Choose?

  • Linear: the level changes by the same amount every moment. Best for very short fades that remove a click at the start or end of a clip.
  • Logarithmic: the level changes by the same number of decibels every moment, so the loudness seems to rise or fall at a steady rate. The natural choice for a long fade-out.
  • S-curve: starts and ends gently, with a faster change in the middle. A good all-round choice for music.

Linear vs. Logarithmic Fades: Which Is Best? compares the curves in detail.

How Long Should a Fade Be?

To remove a click at a cut, 0.01 to 0.05 seconds is enough. For speech, a fade of half a second to one second sounds natural. A song that ends with a fade-out usually takes 3 to 10 seconds. If the fade-in and the fade-out together are longer than the file, the tool shortens both in proportion.

Who Is It For?

Podcasters fading music in and out, video editors smoothing the edges of a clip, and musicians ending a song with a fade instead of an abrupt stop. To fade from one file into another, use the crossfade in the Audio Joiner & Mixer.

How to Add a Fade in 3 Steps

Step 1

Open Your Audio

Choose a file from your device. MP3, WAV, FLAC and M4A work in all modern browsers; OGG depends on your browser.

Step 2

Set the Fades

Enter the fade-in and fade-out length in seconds and choose a curve.

Step 3

Listen and Download

Use the listen buttons to hear each fade, then click Download WAV.

Select Audio File

Drag and drop a file here or choose one from your device. Supported formats: MP3, WAV, FLAC, M4A and OGG (OGG depends on your browser).

Your waveform will appear here after you choose a file.

Time: 00:00 / 00:00
Tip: Use headphones to hear the changes clearly. On a phone, make sure silent mode is off.
Tip: Need to cut out unwanted parts first?
Open Audio Trimmer

Fade Settings

sec
sec

Export Faded Audio

The file is exported as a 16-bit WAV with the same sample rate and channels as the original.

Tip: Need an MP3? Export a WAV here, then convert it.
Audio Converter

Next Step

Cut the recording to length first with the Audio Trimmer, or fade from one file into another with the Audio Joiner & Mixer.

Frequently Asked Questions

Which fade curve sounds most natural?
For a long fade-out on music, the logarithmic curve or the S-curve usually sounds best, because the loudness falls evenly to the ear. For fades of a few hundredths of a second, linear is the right choice.

How long should a fade-out be?
For a song, 3 to 10 seconds is common. For speech and podcast segments, half a second to one second is enough. To remove a click at a cut, use 0.01 to 0.05 seconds.

Why is there a click at the start or end of my audio?
A click occurs when the waveform starts or stops at a point that isn’t zero. A very short fade of 0.01 to 0.05 seconds brings the signal smoothly to zero and removes the click.