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.
WAV to MP3 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

Is the Audio Fade Tool really free?
Yes. The Audio Fade Tool is free to use, with no sign-up and no daily limits.

Are my audio files safe and private?
Yes. The audio is processed in your browser on your own device. Your files are never uploaded to our servers.

What are a fade-in and a fade-out?
A fade-in raises the volume gradually from silence at the start of a recording. A fade-out lowers it gradually to silence at the end. Both avoid an abrupt start or stop.

How do I add a fade-out to an MP3?
Open the MP3, enter the length of the fade-out in seconds, choose a curve and click Download WAV. Use the listen button next to the field to hear the fade first.

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.

Can I fade only the beginning or only the end?
Yes. Enter 0 for the fade you don’t need, and only the other one is applied.

Will fading reduce the audio quality?
No. Only the volume at the start and the end is changed, and the result is saved as an uncompressed 16-bit WAV file.

Do I need to install any software?
No. The tool runs in your web browser on computers, phones and tablets.