MyBestAudio Fade In and Out Online for Free
Add audio fade in and fade out online for free. Set the duration at each end, compare both previews, and save a WAV with your file kept on your device.
Choose your audio
Drag a file here, or choose one from your device.
MP3, WAV, supported M4A · Up to 50MB · 3 minutes · Mono/stereoLinear fades at the beginning and end. Use 0 to disable either fade; the combined duration must fit the clip. Defaults adapt to short clips.
Output: 44.1kHz, 16-bit PCM WAV. MP3 export is not available.
Your result is ready
PROCESSED LOCALLYHow to use this tool
Choose your audio
Select MP3, WAV or a browser-supported M4A file. The original preview remains available.
Set your fades
Set fade-in and fade-out durations in seconds. Use 0 to disable a fade; the combined duration must fit your clip. Select Apply fades.
Compare and download
Listen to the original and faded result, then download the WAV. Changing a duration clears the old result.
Key features
Separate fade controls
Set each end in seconds, or use 0 to leave it unchanged. Combined fade durations must fit inside the clip.
Preserve the clip length
Fades change amplitude without shortening the audio. Compare original and result players before saving a WAV.
Free, without an account
Use the available controls, preview and downloads without sign-up or payment. Processing runs on your device within the stated format and memory limits.
Separate control over each end
Fade in increases gain linearly from silence at the beginning. Fade out decreases gain linearly to silence at the end. Durations default to one second each, adapting to short clips.
A duration of 0 leaves that end unchanged. Combined fades cannot exceed the clip duration. Processing starts from the original decoded samples each time, so repeated clicks do not accumulate fades.
Hear the change before saving
The original and result have separate players. Duration and channel layout stay the same, and the middle is unchanged outside the chosen fade regions. Start playback at a comfortable device volume.
Fading controls amplitude; it does not remove background noise, change speed or crossfade between separate files.
Free online fading with WAV output
MP3 and WAV input; M4A only when your browser can decode it. Up to 50MB, 3 minutes and one or two channels. Output is 44.1kHz, 16-bit PCM WAV; MP3 export is not available.
Both fades, preview playback and WAV downloads are free. Your audio, filename and result stay in your browser, with no account, payment or installation.
Frequently asked questions
Is audio fade in and out online free?
Yes. Both fades, original/result playback and WAV downloads are free, with no sign-up.
Can I fade only the end?
Yes. Set Fade in to 0 and enter the Fade out duration you want.
Does applying a fade shorten the audio?
No. Fading changes sample amplitude, while retaining the clip duration and channel layout. Output is WAV.